www.arves.org - Garcia MT

Studies awarded in the 4 sections for the

Mario Garcia Memorial Tournament:

Garcia, Mario 1948-2024

With his grandchildren.

So far Sections A1, A2 and B1 are here available.

Section A1 (no theme Wins):

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Eduard Eilazyan, Ukraine"] [Black "1 prize"] [Result "1-0"] [SetUp "1"] [FEN "5r2/1P6/P2q1pN1/K7/2Q2P2/3r4/7b/k3B3 w - - 0 1"] [PlyCount "33"] [EventDate "2024"] 
 1. Qc1+ $1 {Foresight effect for nine moves!} ({Main thematic try:} 1. Bc3+ $2 Kb1 2. Qb4+ Qxb4+ 3. Bxb4 Rd5+ 4. Kb6 Bg1+ 5. Kc6 Rfd8 6. Be7 Ba7 { Here White cannot take the f6 pawn with tempo.} 7. Bxd8 Rxd8 8. Ne7 Rd2 $1 ( 8... Bb8 $2 9. Kb5 Rd7 10. Nc6 Bxf4 11. Kc4 Rxb7 12. axb7 $18) 9. Kc7 Ra2 10. Nc6 Rxa6 11. Nxa7 Rxa7 12. Kc8 Rxb7 $11) 1... Ka2 2. Qc2+ Ka3 (2... Ka1 3. Bc3+ Rxc3 4. Qxc3+ Kb1 5. Nxf8 $18) 3. Qa4+ ({loss of time} 3. Qc1+ Ka2 4. Qc2+ Ka3) 3... Kb2 4. Qb4+ Qxb4+ (4... Kc2 5. Qxd6 Rxd6 6. Nxf8 $18) 5. Bxb4 Rd5+ (5... Re8 6. a7 Rd5+ 7. Ka4 Rdd8 8. Kb5 Bg1 9. Bc5 Bxc5 10. Kxc5 $18) 6. Kb6 Rfd8 ({ or} 6... Bg1+ 7. Kc6 Rfd8 8. Be7 Ba7 9. Bxf6+) 7. Be7 Bg1+ (7... Re8 8. a7 Bg1+ 9. Kc6 Bxa7 10. Kxd5 $18) 8. Kc6 Ba7 { Compared to the Main thematic try, here the king is on square b2.} 9. Bxf6+ $1 {check! Black has a choice: where should the king move? B:} Kb3 ({A:} 9... Ka3 10. Bxd8 Rxd8 11. Ne7 Rf8 12. Nc8 Rf6+ 13. Kd7 $1 ({But not} 13. Kd5 $2 Rxa6 ({ Loss of time} 13... Bb8 14. a7 Bxa7 15. Nxa7 Rb6) 14. Nxa7 Rb6 15. Nb5+ Rxb5+ 16. Kc6 Rb4 $11 (16... Kb4)) ({Loss of time} 13. Kc7 Rf7+ 14. Kc6 Rf6+ 15. Kd7 $1) (13. Kb5 $2 Bb8 14. a7 Bxa7 15. Nxa7 Rxf4 $11) 13... Rxa6 14. Nxa7 Rxa7 15. Kc8 {/Kc6} Rxb7 16. Kxb7 {The black king from square a3 cannot delay the pawn.} Kb4 17. Kc6 $18) 10. Bxd8 Rxd8 11. Ne7 Rf8 12. Nc8 Rf6+ 13. Kd5 $1 { Change of solution!} ({Thematic try:} 13. Kd7 $2 Rxa6 14. Nxa7 Rxa7 15. Kc8 Rxb7 16. Kxb7 Kc4 17. Kc6 Kd4 18. f5 Ke5 $11) (13. Kc7 $6 Rf7+ 14. Kd6 (14. Kc6 Rf6+ {Loss of time}) 14... Bb8+ $1 $11) 13... Rxa6 14. Nxa7 Rb6 15. Nc6 $1 Rxb7 16. Na5+ {The b3 square for the black king turned out to be mined!} Kc3 17. Nxb7 $18 {"In study, a synthesis of two themes is implemented: the effect of foresight and change of solution. On the first move, White makes the right choice and forces the black King to occupy the b2 square. Then they use this circumstance on the 9th move. The choice of the square for the white King to retreat from the Rook check on the 13th move depends on the choice of the square for the black King to retreat from the Bishop check on the 9th move" (author's comment). A two-phase study with a sequential synthesis. The phases are interconnected-there is a logical transition from the first phase to the second.}

[Event "MT Mario Garcia, UAPA 2025 Sec. A1 "] [Site ""] [Date ""] [Round ""] [White "Eduard Eilazyan , Ukraine"] [Black "2 prize version"] [Result "1-0"] [SetUp "1"] [FEN "8/4k3/2P3R1/8/8/2p2p2/7B/1n1K4 b - - 0 1"] [PlyCount "50"] [EventDate "2026"] 
 1... c2+ $1 {Diverting the white king from a passed pawn.} 2. Kxc2 f2 $1 { The passed pawn gives Black a chance to escape. For the pawn, White will have to give up the rook.} 3. Rg7+ $1 {Diverting the black king from a passed pawn.} ({Try:} 3. Bd6+ $2 Kf7 4. Rg4 f1=Q 5. Rf4+ Qxf4 6. Bxf4 Na3+ 7. Kb3 Nb5 8. Kc4 Na7 9. c7 Ke7 10. Kc5 Kd7 11. Kb6 Nc6 12. Kb7 Nd8+ 13. Kb8 Nc6+ 14. Kb7 { Perpetual check}) ({Or} 3. Rg4 $2 f1=Q 4. Re4+ Kf6 5. Rf4+ Qxf4 6. Bxf4 Na3+ 7. Kb3 Nb5 8. Kc4 Na7 $11) 3... Kf8 $1 (3... Kf6 4. Be5+ Ke6 5. c7 f1=Q 6. c8=Q+ Kxe5 7. Re7+ $18) 4. Rg1 $1 (4. Rg4 $2 f1=Q 5. Rf4+ Qxf4 6. Bxf4 Na3+ 7. Kb3 Nb5 8. Kc4 Na7 $11) 4... Na3+ 5. Kb3 fxg1=Q 6. Bxg1 { A change in the situation! Now the white passed pawn gives a chance to win.} Nb5 7. Kc4 $1 (7. Kb4 $2 Nc7 8. Bh2 Ne6 $11) 7... Nc7 8. Bb6 $1 (8. Bh2 $2 Ne8 $1 9. Kb5 Ke7 $11) 8... Ne8 9. Bd8 $1 (9. Bc5+ $2 Kf7 10. Kd5 Nc7+ 11. Kd6 Ne8+ 12. Kd7 Nf6+ 13. Kd8 Nd5 $11) 9... Nd6+ 10. Kd5 $1 (10. Kc5 $2 Ke8 11. Bb6 Nc8 $11) 10... Ke8 11. Ke6 $1 { Refusal to take the knight due to the position of mutual zugzwang.} (11. Kxd6 $2 Kxd8 {Reciprocal zugzwang WTM} 12. c7+ Kc8 13. Kc6 $11 {Stalemate.}) 11... Nb5 $1 {Black refuses to take the bishop for the same reason.} (11... Kxd8 $2 12. Kxd6 {Reciprocal zugzwang BTM} Kc8 13. c7 Kb7 14. Kd7 $18) 12. Bb6 $1 (12. Bf6 $2 Nc7+ 13. Kd6 Nb5+ 14. Kc5 Na7 15. c7 Kd7 $11) 12... Kf8 13. Kd7 (13. Bc5+ Ke8 14. Bb6 Kf8) 13... Kg8 14. Ke8 $1 (14. Bd4 Kf8 15. Bb6 Kg8) 14... Nd6+ 15. Kd8 Nb5 16. Bc5 $1 ({Waste of time:} 16. Ke7 Kg7 17. Ke6 Kf8 18. Kd7 Kg8 19. Ke8) (16. Ke8 Nd6+ 17. Kd8 Nb5) 16... Kf7 17. Kd7 $1 { Reciprocal zugzwang BTM} (17. Kc8 $2 Nc3 18. Kd7 (18. Kb7 Nd5 $11) 18... Nb5 $11 {Reciprocal zugzwang WTM}) 17... Kf6 18. Kc8 $1 Ke6 (18... Nc3 $2 19. Bd4+) 19. Kb7 $18 {e.g.} Kd5 20. Be7 Kc4 21. Bf8 Kd5 22. Kb6 Kc4 23. Bg7 Kb4 24. Bh6 Kc4 25. Bd2 Nd6 26. c7 $18 {(author's comment). Another two-phase study with sequential synthesis. The change in the introductory moves improved the study. The introduction became thematic due to the mutual application of similar tactical techniques.}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Michael Pasman, Israel"] [Black "Special prize"] [Result "1-0"] [SetUp "1"] [FEN "2k2NR1/B6p/3P4/1NP4n/2n5/5p1K/4r3/5r2 w - - 0 1"] [PlyCount "27"] [EventDate "2026"] 
 1. d7+ $1 (1. c6 $2 Rh1+ 2. Kg4 Ne5+ 3. Kf5 Ng3+ 4. Kf6 Nh5+ 5. Kf5 Ng3+ 6. Rxg3 Nxc6 $11) 1... Kd8 2. Bb6+ $1 (2. c6 $4 Rh1+ 3. Kg4 Ne5+ 4. Kf5 Nxc6 $19) 2... Nxb6 {[#]} 3. c6 $1 Nf4+ (3... Rh1+ 4. Kg4 Nf6+ 5. Kf5 Nxg8 6. c7+ Ke7 7. d8=Q+ Kf7 8. Nd6+ Kg7 9. Nd7 Ne7+ 10. Kg4 Nxd7 11. Nf5+ $1 Kf7 12. Qxd7 f2 13. c8=Q $18) 4. Kg4 (4. Kh4 $2 Rh2+ 5. Kg4 Rg1+ 6. Kf5 Rh5+ $1 7. Ke4 Re1+ 8. Kxf4 Nd5+ 9. Kxf3 Rf5+ 10. Kg2 Re2+ 11. Kg1 Re1+ $11) 4... Rg1+ 5. Kf5 $1 (5. Kxf4 $4 Nd5+ $19) 5... Ke7 {[#]} (5... Re5+ 6. Kxf4 $1 Nd5+ 7. Kxe5 $18) 6. c7 $1 ( 6. Rxg1 $2 Nxd7 $11) 6... Ne6 7. Rxg1 ({Thematic try :} 7. c8=N+ $2 {3rd knight } Nxc8 8. dxc8=N+ {another knight} Kf7 $1 $11) 7... f2 {[#]} 8. Nxe6 (8. c8=Q $2 Nxc8 {and thematic} 9. dxc8=N+ {is not good enough} Kxf8 10. Rf1 $11) (8. Rd1 $2 f1=Q+ $1 9. Rxf1 Nxc7 10. Nd4 Nxd7 11. Nxe2 Nxf8 $11) (8. c8=N+ $2 { is again too early}) 8... Re5+ $1 ({Thematic line:} 8... Kxd7 9. Rd1+ Ke7 10. Nbd4 $1 Re1 11. Nc6+ Kf7 12. Ne5+ $1 Ke7 13. c8=N+ $1 $18 {third knight!} (13. c8=Q $4 f1=Q+ $19)) 9. Kxe5 Nxd7+ 10. Kf5 $1 fxg1=Q {[#]} 11. c8=N+ $1 { Third knight!} (11. c8=Q $2 $11 {is perpetual check}) 11... Kf7 12. Nbd6+ Kg8 13. Ne7+ Kh8 14. Nf7# {At the end of the 19th century, A. Troitsky checkmated with three Knights in three corners of the board. Here, the author did not set such an ambitious goal and limited himself to checkmating in one corner.}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Michal Hlinka & Luboš Kekely, Slovakia"] [Black "1 honorable mention"] [Result "1-0"] [SetUp "1"] [FEN "1kB5/8/1b5p/PK2p3/1P6/3p4/7P/8 w - - 0 1"] [PlyCount "27"] [EventDate "2024"] 
 1. Bf5 $1 d2 2. Bc2 (2. Bg4 $2 Bd4 $11) 2... Bd8 (2... Bd4 3. Ka6 e4 4. b5 e3 5. Bd1 Kc7 6. b6+ Kc6 7. Be2 $1 Kc5 8. b7 Be5 9. Ka7 Kb4 10. a6 Ka5 11. b8=Q Bxb8+ 12. Kb7 $1 $18) 3. Ka6 $1 Kc7 4. h4 $1 ({try} 4. b5 $2 Kd6 5. b6 Kc5 6. b7 Bc7 $11) ({Logical try} 4. Ka7 $2 e4 5. Ka6 $1 h5 $1 6. h3 h4 7. Ba4 e3 8. Bd1 Bf6 9. b5 Bc3 $1 10. b6+ Kc6 11. Be2 (11. b7 Be5 12. Ka7 Kd5 $1 13. a6 Ke4 14. Be2 Kf4 $1 15. Ka8 Kg3 16. a7 Kf2 $11) 11... Bd4 $1 { Position A1 mzz - White to move} 12. Bf3+ Kc5 13. b7 Be5 14. Ka7 Kd4 15. Be2 Kc3 16. a6 Kc2 17. b8=Q Bxb8+ 18. Kxb8 d1=Q 19. Bxd1+ Kxd1 $11) 4... Kc6 (4... Bxh4 5. b5 Bd8 6. Ka7 Kd6 7. b6 Kc5 8. b7 Bc7 9. a6 Kb5 10. Bd3+ Kb4 11. Be2 Ka5 12. b8=Q Bxb8+ 13. Kb7 $1 $18) (4... e4 5. h5 e3 6. Bd1 Kc6 7. Bf3+ Kc7 8. Ka7 $18) 5. Ba4+ $1 ({try} 5. Be4+ $2 Kd6 6. Bc2 Bxh4 7. Kb7 Bf2 $1 8. a6 h5 9. b5 h4 $1 $11) 5... Kc7 (5... Kd6 6. Kb7) 6. h5 $1 (6. Bc2 Kc6 7. Ba4+ { waste of time}) (6. b5 $2 Kd6 $1 7. b6 Kc5 8. b7 Bc7 $11) 6... e4 7. Bc2 $1 e3 (7... Bf6 8. b5 e3 9. b6+ Kc6 10. Bd1 Bc3 11. b7 Be5 12. Ka7 $18) 8. Bd1 Bf6 ( 8... Kc6 9. Bf3+ Kc7 10. Ka7 $18) 9. b5 Bd4 (9... Bc3 10. b6+ Kc6 11. b7 $18) ( 9... Kd6) 10. b6+ Kc6 11. Be2 $1 {Position A mzz - Black to move} (11. Bf3+ $2 Kc5 12. b7 Be5 13. Ka7 Kd4 14. Be2 Kc3 15. b8=Q Bxb8+ 16. Kxb8 Kc2 $11) 11... Bc3 (11... Be5 12. Bf3+ (12. Ka7 Bd4 13. Ka6 Be5 {waste of time}) 12... Kc5 13. Kb7 $1 Kb4 14. a6 $18) 12. b7 Kc7 13. Ka7 Bd4+ 14. Ka8 $18 {Initially, the judge perceived the study as a sequence of moves without a clear idea. Unfortunately, authors often fail to comment on their pieces or explain their intentions. The judge managed to find a mutual zugzwang not mentioned by the authors, as well as a false try in which the zugzwang with White's move was shown in parentheses. With the zugzwang logical sense emerged in White's play.}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Ilshat Valitov, Serbia"] [Black "2 honorable mention"] [Result "1-0"] [SetUp "1"] [FEN "7r/P2k4/1P4PP/2b5/8/8/1K6/n7 w - - 0 1"] [PlyCount "29"] [EventDate "2026"] 
 1. Kc3 $1 (1. g7 $2 Bd4+ 2. Kb1 $11) 1... Kc6 (1... Bxb6 2. g7 Rc8+ 3. Kd3 $18) 2. g7 Rd8 3. a8=Q+ $1 {Deflection of the rook from the d-file} (3. h7 $2 Bd4+ $19) 3... Rxa8 4. h7 Ra3+ 5. Kd2 (5. Kc4 $2 Nc2 6. g8=Q Ne3#) (5. Kb2 $2 Bd4+ 6. Kxa3 Bxg7 $19) 5... Nb3+ 6. Kd3 $1 (6. Kd1 $2 Ra1+ 7. Kc2 (7. Ke2 Nd4+ 8. Kd3 Rd1+ 9. Ke4 Re1+ $11) 7... Nd4+ 8. Kb2 Nb5 $1 9. h8=Q Bd4+ 10. Kc2 Bxg7 11. Qxg7 Ra6 $11) (6. Kc2 $2 Nd4+ $11) 6... Nd4+ 7. Ke4 (7. Kd2 $2 Bb4+ 8. Kc1 Bc3 9. g8=Q Ra1#) 7... Ne2 $1 (7... Ne6 8. g8=Q (8. h8=Q $2 Re3+ 9. Kf5 Nxg7+ 10. Qxg7 $11) 8... Re3+ 9. Kf5 $18 {White wins. For example:} Bd4 10. h8=Q Bxh8 11. Qxh8 Kxb6 (11... Re2 12. Qb8 $1 $18) 12. Qb2+ $1 $18) (7... Nb5 8. h8=Q $1 (8. b7 $18) 8... Nd6+ 9. Kf4 $18 (9. Ke5 $2 Nf7+ $11)) 8. h8=Q $1 (8. g8=Q $2 Re3+ 9. Kf5 Rf3+ 10. Kg6 Rg3+ 11. Kf7 Rf3+ 12. Ke8 Re3+ 13. Kd8 Bxb6+ 14. Kc8 Bd4 15. Qc4+ Kd6 16. Qxd4+ Nxd4 17. h8=Q $11) 8... Re3+ 9. Kf5 Rf3+ 10. Kg6 Rg3+ 11. Kf7 Rf3+ 12. Ke8 Re3+ 13. Kd8 Bxb6+ 14. Kc8 $18 {White wins. For example:} Bd4 15. Qh6+ $18 {Change of solution. Depending on the choice of the black Knight, White decides which pawn to promote to a Queen.} (15. Qh1+) *

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Martin Minski, Germany"] [Black "3 honorable mention"] [Result "1-0"] [SetUp "1"] [FEN "2B4r/6p1/7N/7P/k6K/4p3/8/3N4 w - - 0 1"] [PlyCount "23"] [EventDate "2025"] 
 {[#]} 1. Ng8 $1 (1. Bd7+ $2 Kb4 2. Nxe3 gxh6 $11) (1. Nxe3 $2 Rxc8 $11) 1... e2 $1 (1... Rxg8 2. Bd7+ Kb4 3. Nxe3 Kc5 4. Kg5 Kd6 5. Bg4 Ke7 6. Kg6 $18) (1... g5+ 2. Kg4 $18) 2. Nc3+ Kb4 3. Nxe2 Rxg8 4. Bh3 $1 (4. Be6 $2 Rb8 $1 5. Ng3 Rb6 $11) (4. Bg4 $2 g5+ $11) 4... Kc5 (4... g5+ 5. Kg4 $18) (4... Rf8 5. Ng3 Kc5 6. Nf5 Kd5 7. Nxg7 Ke5 8. Kg5 $18) 5. Ng3 Kd5 (5... g5+ 6. Kg4 Kd6 7. h6 $1 Ke7 8. Kh5 g4 9. Bxg4 Kf6 (9... Kf7) (9... Kf8) 10. Ne4+ $18) 6. Nf5 Ke6 $5 (6... Ke5 7. Kg5 Ra8 8. Nxg7 $18) (6... g5+ 7. hxg6 $1 Rxg6 (7... Ke5 8. Kg5 $18) 8. Ne7+ $18) 7. Nh6+ Ke7 8. Nxg8+ Kf7 9. Ne7 $1 (9. Kg5 $2 Kxg8 $11) (9. Be6+ $2 Kxe6 10. Kg5 Kf7 11. Ne7 Kxe7 12. Kg6 Kf8 13. Kh7 Kf7 $11) 9... Kxe7 10. Kg5 Kf7 11. Be6+ $1 Kxe6 12. Kg6 $18 {In the finale, White sacrifices pieces in the correct sequence, preventing the black King from moving into the draw corner.}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Pavel Arestov, Russia"] [Black "Commendation"] [Result "1-0"] [SetUp "1"] [FEN "1N6/8/1R6/8/1r2q1p1/4N1RB/7k/2K5 w - - 0 1"] [PlyCount "17"] [EventDate "2026"] 
 1. Nf1+ (1. Rxb4 $2 Qxb4 $11) 1... Kh1 2. Bg2+ Qxg2 3. Rh6+ $1 (3. Rxg2 $2 Rxb6 $1 $11) 3... Qh3 $1 (3... Kg1 4. Rxg2+ Kxg2 5. Ne3+ Kf3 6. Nc6 $18 (6. Na6)) 4. Rgxh3+ $1 (4. Rhxh3+ $2 gxh3 5. Rxh3+ Kg2 $11 (5... Kg1)) 4... gxh3 5. Nc6 $1 ( 5. Rxh3+ $2 Kg2 $11 (5... Kg1)) 5... Ra4 $1 (5... Rf4 6. Ne3 {-Main line}) 6. Ne3 $1 {Switchback} (6. Rxh3+ $2 Kg2 $11) (6. Kb2 $2 Kg1 $1 7. Ne3 h2 8. Rg6+ Kf2 $11) 6... h2 (6... Re4 7. Rxh3+ $18) 7. Nd4 $3 {Puante} ({Try:} 7. Ne5 $2 Kg1 8. Rg6+ Kf2 9. Nd1+ Kf1 $1 10. Rf6+ Kg2 11. Rg6+ (11. Ne3+ {position} Kg3 ( 11... Kh3) 12. Rh6) 11... Kf1 $11 {Positional draw}) (7. Rf6 $2 Ra1+ 8. Kb2 Re1 $11) 7... Rxd4 (7... Kg1 8. Rg6+ (8. Ne2+ Kf2 9. Kd2) 8... Kf2 9. Nd1+) 8. Rf6 $1 Kg1 (8... Rg4 9. Nxg4 $18) 9. Rf1# { model mate with blocking h2 (author's comment).}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Hergert Volker, Switzerland"] [Black "Commendation"] [Result "1-0"] [SetUp "1"] [FEN "4K1B1/8/1P6/k7/3Pb2P/8/8/5n2 w - - 0 1"] [PlyCount "19"] [EventDate "2023"] 
 1. b7 $1 {Desperado sacrifice that pulls the bishop over the intersection square d5 and puts it into a passive position.} (1. d5 $2 Kxb6 $10) (1. h5 $2 Kxb6 $10) 1... Bxb7 (1... Bc6+ 2. Kf8 $1 Bxb7 3. h5 Ne3 4. d5 $1 $18 { The win is easier for White than after immediate 1...Bxb7.}) 2. h5 (2. d5 $2 Bxd5 (2... Ng3 $10) 3. Bxd5 Ng3 $10) 2... Ne3 $1 (2... Ng3 3. h6 $18) (2... Be4 3. d5 Ng3 (3... Ne3 4. d6 Nf5 5. d7 $18) 4. h6 Nf5 5. Bh7 $1 Nd6+ 6. Kd7 Bxh7 7. Kxd6 $18) 3. d5 $1 {A sacrifice on the intersection square.} (3. h6 $2 Be4 $10) 3... Kb6 $1 {Its relatively best for Black to decline the offer.} (3... Nxd5 4. h6 $1 Nf6+ (4... Nf4 5. Bh7 $1 $18 { The passed pawn is only blocked shortly and cannot be stopped anymore.}) 5. Kf7 Nxg8 6. h7 $1 $18) (3... Bxd5 4. Bxd5 Nxd5 5. Kf7 $1 $18) 4. d6 $1 (4. h6 $2 Ng4 5. h7 Nf6+ 6. Ke7 Nxh7 $10) 4... Bc6+ (4... Nf5 5. d7 $18) 5. Kd8 $1 (5. Kf8 $2 Nf5 6. Bh7 Nh6 $11 (6... Nxd6 $2 7. h6 $18) 7. Kg7 (7. Ke7 Kc5 8. d7 Bxd7 $11) 7... Bf3 $1 8. d7 Kc7 $11) (5. d7 $2 Ng4 6. Be6 Bxd7+ $1 7. Bxd7 (7. Kxd7 Nf6+ 8. Ke7 Nxh5 $10) 7... Nf6+ 8. Kf7 Nxh5 $10) 5... Nf5 (5... Kc5 6. h6 Kxd6 7. h7 $18) 6. d7 Kc5 (6... Nh6 7. Be6 $18) 7. Be6 $1 (7. Kc7 $2 Bxd7 $1 8. Kxd7 Kd4 9. Ke6 Ng7+ 10. Kf7 Nxh5 $11) 7... Ng7 8. h6 $1 (8. Ke7 $2 Bxd7 9. h6 (9. Bxd7 Nxh5 $10) 9... Nf5+ 10. Bxf5 Bxf5 $10) 8... Nxe6+ 9. Ke7 Bxd7 10. h7 $1 $18 {(author's comment).}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Hergert Volker, Switzerland"] [Black "Commendation"] [Result "1-0"] [SetUp "1"] [FEN "2k5/2P3p1/3P4/6bp/2K5/8/7N/8 w - - 0 1"] [PlyCount "17"] [EventDate "2023"] 
 1. Kc5 $1 {Threatens both 2.Kc6 with checkmate on the spot and 2.Kb6 with a winning position.} (1. Kd5 $2 Kd7 2. Nf3 Bf4 $1 3. Ne5+ Bxe5 4. Kxe5 h4 $11) ( 1. Kb5 $2 Kb7 $10) (1. Nf3 $2 Bf4 $1 2. Kd5 Kd7 {see 1.Kd5?}) 1... Kb7 (1... Bf4 2. Kc6 $1 Bxh2 (2... Bxd6 3. Kxd6 $18) 3. d7#) (1... Kd7 2. Kb6 $18) 2. Kd5 $1 {The idea of this triangulation is that Black can no longer reply with Kd7.} (2. Nf3 $2 Be3+ 3. Kd5 Bb6 $1 $10 { as White cannot prevent Black from sacrificing his bishop for the two pawns.}) 2... h4 (2... Be3 3. Ke6 Bb6 4. Kd7 $18) 3. Ng4 $1 (3. Nf3 $2 {Again incorrect! } h3 $1 4. Ke6 (4. Nxg5 h2 5. Ke6 h1=Q { and here White must find a precise move order to just draw:} 6. c8=Q+ Kxc8 7. d7+ Kc7 8. Ke7 $10) 4... Kc8 5. Nxg5 (5. Nd4 h2 6. Nc6 h1=Q 7. Na7+ Kb7 8. c8=Q+ Kxa7 9. Qc5+ Ka6 10. Qxg5 Qc6 $1 $10) 5... h2 6. Nf7 (6. Ke7 h1=Q 7. d7+ Kxc7 8. d8=Q+ Kb7 $10) 6... h1=Q 7. d7+ Kxc7 8. d8=Q+ { Here, White can chase the king a lot, but the black monarch eventually escapes. } Kb7 9. Nd6+ Ka6 10. Qc8+ Kb6 $1 (10... Ka5 $2 11. Qc5+ Ka4 12. Qb5+ Ka3 13. Nc4+ Ka2 14. Qb2#) 11. Qb8+ Kc5 12. Qb5+ Kd4 13. Qc4+ (13. Nf5+ Kc3 $10) 13... Ke3 14. Nf5+ Kd2 15. Qd4+ Kc2 $10) (3. Ke6 Kc8 4. Ng4 (4. Nf3 $2 h3 5. Nxg5 { leads us back to the last sideline}) 4... h3 5. Kd5 (5. Ne5 h2 { is a draw line we also had above}) 5... Kb7 6. Ke5 Kc8 7. Ke6 { is the main line but with a waste of time}) 3... h3 (3... Bd2 4. Ke6 Ba5 5. Kd7 $18) 4. Ke5 $1 (4. Ke6 Kc8 5. Kd5 (5. Ne5 $2 h2 $10 {see above}) 5... Kb7 { Waste of time}) 4... Kc8 (4... Bd2 5. Ke6 Kc8 { is the same position as in the main line.}) 5. Ke6 Bd2 $1 {Addressing both possible replies White would have after the two other candidate moves with the bishop.} (5... Bh4 6. Ne3 $1 h2 7. Nd5 h1=Q 8. d7+ Kb7 9. c8=Q+ $18 { followed by checkmate}) (5... Bf4 6. Ke7 Bg5+ 7. Ke8 $18) 6. Nf6 $1 {Interrupti ng the diagonal h4-d8 und thus shielding the king from a bishop check on g5.} ( 6. Ne5 $2 Ba5 $1 $10) (6. Ke7 $2 Bb4 $1 $10) 6... gxf6 {Black has no other choice than to accept the sacrifice as otherwise the knight would reach any of the key squares d5 or e8.} 7. d7+ Kxc7 8. Ke7 Bb4+ 9. Ke8 $18 { (author's comment).}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Jorge Joaquín Lois, Argentina"] [Black "Special commendation"] [Result "1-0"] [SetUp "1"] [FEN "8/k5p1/p2bP1P1/K7/P1p2p1P/4p1p1/1P2P1p1/6N1 w - - 0 1"] [PlyCount "25"] 
 1. h5 Bf8 2. h6 (2. Nf3 Kb7 3. Ng1 (3. h6 c3 4. bxc3 gxh6 5. c4 Bg7 6. Kb4 Kc6 $11) 3... Ka7 {waste of time}) 2... c3 $1 3. bxc3 (3. hxg7 $2 Bxg7 4. e7 cxb2 $19) (3. h7 $2 cxb2 $19) 3... gxh6 4. c4 (4. g7 $4 Bxg7 5. e7 Bxc3#) 4... h5 ( 4... Kb7 5. c5 Bg7 6. Kb4 Kc6 7. Kc4 $18) 5. c5 h4 (5... Kb7 6. c6+ Kxc6 7. e7 $1 Bxe7 8. g7 $18) 6. c6 h3 7. c7 $1 (7. e7 $2 Bxe7 8. c7 Bb4+ 9. Kxb4 h2 10. c8=Q hxg1=Q $11) (7. Nxh3 $2 f3 $19) 7... Kb7 (7... h2 8. c8=Q hxg1=Q 9. Qc7+ Ka8 10. Kxa6 $18) (7... Bb4+ 8. Kxb4 h2 9. c8=Q $18) 8. e7 $1 Bxe7 9. g7 h2 ( 9... Bf6 $2 10. c8=Q+ $1 Kxc8 11. g8=Q+ Bd8+ 12. Kxa6 h2 13. Qc4+ Bc7 14. Qe6+ Kd8 15. Qd5+ Kc8 16. Qxg2 $18) 10. g8=Q $1 (10. c8=Q+ $2 Kxc8 11. g8=Q+ Bd8+ $1 $19) 10... Kxc7 11. Qc4+ Kd7 (11... Kd6 12. Qxf4+ Kd5 13. Qf3+) (11... Kb8 {but White wins more easily} 12. Kb6 ({ The author tried to complete the study with the line} 12. Qxf4+ Kc8 13. Kb6 Bd8+ 14. Kc6 hxg1=Q 15. Qg4+ Kb8 16. Qb4+ $18) 12... Bd8+ 13. Kc6 hxg1=Q 14. Qb4+ $18) 12. Qd5+ Kc7 13. Qxg2 $18 {Perhaps the amount of force on the board can be reduced.}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Stanislav Nosek, Czech Republic"] [Black "Special commendation"] [Result "1-0"] [SetUp "1"] [FEN "2kBq1n1/8/2P5/1K2Pp2/8/8/2Q5/8 w - - 0 1"] [PlyCount "13"] [EventDate "2026"] 
 1. Bf6 $1 ({not enough} 1. Qxf5+ $2 Kxd8 2. Kb6 Qxc6+ $1 (2... Ne7 $2 3. c7#) 3. Kxc6 Ne7+ $11) 1... Nxf6 (1... Qe6 2. Qd3 $1 Nxf6 3. exf6 Kc7 (3... Qe5+ 4. Kc4 Qe6+ 5. Qd5 $18) 4. Qg3+ Kc8 5. Kc5 $1 Qxf6 6. Qg8+ Qd8 7. Qe6+ Kc7 (7... Kb8 8. Qb3+ $18) 8. Qf7+ Kb8 9. Qb7#) (1... Nh6 2. Qa2 $1 Kb8 3. Kb6 $18) (1... Ne7 2. Bxe7 Qxe7 3. Qxf5+ Kc7 4. e6 $18) (1... Kc7 2. Qc5 Qb8+ 3. Kc4 Nxf6 4. Qd6+ $18) 2. Qxf5+ (2. exf6 $2 Qe5+ 3. Qc5 Qxf6 $11) 2... Nd7 (2... Kc7 3. Qxf6 Qb8+ 4. Kc5 $1 (4. Kc4 $2 Qg8+ $1) 4... Qb6+ 5. Kd5 Qb5+ 6. Ke6 Qxc6+ 7. Kf7 Qd5+ 8. e6 Qh5+ 9. Kf8 $18 {with pawn promotion to queen}) 3. e6 $1 ({premature } 3. cxd7+ $2 Qxd7+ 4. Qxd7+ Kxd7 $11) 3... Nb8 4. e7+ Nd7 (4... Kc7 5. Qf4+ Kc8 6. Qf8 $18) 5. cxd7+ $1 (5. Qxd7+ $2 Qxd7 6. cxd7+ Kxd7 $11) 5... Qxd7+ 6. Kb6 $3 Qxf5 7. e8=Q# {model mate (author's comment). The study can be considered a correction and improvement of the work by L. Mitrofanov, 1970.}

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date ""] [Round ""] [White "Eduard Eilazyan, Ukraine"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/4k2b/2PR4/4N3/8/5p2/2K4B/1n6 w - - 0 1"] [PlyCount "51"] [EventDate "2026"] 
 {The Rook is attacked and the King is in check. How can White win?} 1. Ng6+ $1 {Everything else leads to a draw:} (1. Rg6 $2 f2 $1 2. c7 $1 f1=Q (2... Bxg6+ 3. Nxg6+ Kd7 4. Ne5+ Kxc7 5. Nd3+ $11) 3. c8=Q Qg2+ 4. Kxb1 Bxg6+ 5. Nxg6+ Qxg6+ $11) (1. Rd3 $2 f2 2. c7 f1=Q 3. c8=Q Bxd3+ 4. Nxd3 Qe2+ $11) (1. Nd3 $2 f2 2. c7 f1=Q 3. c8=Q Bxd3+ 4. Rxd3 Qe2+ 5. Kxb1 Qxd3+ $11) 1... Bxg6+ 2. Rxg6 (2. Kc1 $2 f2 3. Rd1 Nc3 4. Rf1 Ne4 5. c7 Bf5 $11) 2... f2 $1 {The passed pawn gives Black a chance to escape. For the pawn, White will have to give up the rook.} 3. Rg7+ $1 ({Thematic try} 3. Bd6+ $2 Kf7 $1 4. Rg4 f1=Q 5. Rf4+ Qxf4 6. Bxf4 Na3+ 7. Kb3 Nb5 8. Kc4 {Position A1 with wBf4 - there is a move} Na7 $1 9. c7 Ke7 10. Kc5 Kd7 11. Kb6 Nc6 $1 12. Kb7 Nd8+ (12... Na5+) 13. Kb8 Nc6+ $11 { Perpetual check}) ({Thematic try} 3. Rg4 $2 f1=Q 4. Re4+ Kf6 5. Rf4+ Qxf4 6. Bxf4 Na3+ 7. Kb3 Nb5 8. Kc4 {Position A1 with wBf4 - there is a move} Na7 $11) (3. Rg1 $2 fxg1=Q 4. Bxg1 Kd6 $11) 3... Kf8 $1 (3... Kf6 4. Be5+ $1 (4. Rg8 $2 Kf7 $11) 4... Ke6 5. c7 f1=Q 6. c8=Q+ Kxe5 7. Re7+ $18) 4. Rg1 $1 { White must exchange the promoted Queen on another square} ({Thematic try} 4. Rg4 $2 f1=Q 5. Rf4+ Qxf4 6. Bxf4 Na3+ 7. Kb3 Nb5 8. Kc4 { Position A1 with wBf4 - there is a move} Na7 $11) 4... Na3+ 5. Kb3 fxg1=Q 6. Bxg1 { A change in the situation! Now the white passed pawn gives a chance to win.} Nb5 7. Kc4 $1 {Position A with wBg1 - no move 7...Na7} (7. Kb4 $2 Nc7 8. Bh2 Ne6 $11 (8... Ne8)) 7... Nc7 8. Bb6 $1 (8. Bh2 $2 Ne8 $1 $11) 8... Ne8 (8... Ne6 9. Kd5 Ke7 10. Bc5+ $18) 9. Bd8 $1 (9. Bc5+ $2 Kf7 10. Kd5 Nc7+ $11) 9... Nd6+ 10. Kd5 $1 (10. Kc5 $2 Ke8 $1 11. c7 (11. Bh4 Nc8 $11) 11... Kd7 $11) 10... Ke8 11. Ke6 $1 { Refusal to take the knight due to the position of mutual zugzwang.} (11. Kxd6 $2 Kxd8 {Reciprocal zugzwang WTM} 12. c7+ Kc8 13. Kc6 $11 {Stalemate.}) 11... Nb5 $1 {Black refuses to take the bishop for the same reason.} (11... Kxd8 $2 12. Kxd6 {Reciprocal zugzwang BTM} Kc8 13. c7 Kb7 14. Kd7 $18) 12. Bb6 $1 (12. Bf6 $2 Nc7+ 13. Kd6 Nb5+ 14. Kc5 Na7 15. c7 Kd7 $11) 12... Kf8 13. Kd7 (13. Bc5+ Ke8 14. Bb6 Kf8 {waste of time}) 13... Kg8 14. Ke8 $1 (14. Bd4 Kf8 15. Bb6 Kg8 {waste of time}) 14... Nd6+ 15. Kd8 Nb5 16. Bc5 $1 (16. Ke7 Kg7 17. Ke6 Kf8 18. Kd7 Kg8 19. Ke8 {waste of time}) ({Or} 16. Ke8 Nd6+ 17. Kd8 Nb5 { waste of time}) 16... Kf7 17. Kd7 $1 {Reciprocal zugzwang BTM} (17. Kc8 $2 Nc3 18. Kd7 (18. Kb7 Nd5 $11) 18... Nb5 $11 {Reciprocal zugzwang WTM}) 17... Kf6 18. Kc8 $1 Ke6 (18... Nc3 $2 19. Bd4+ $1 $18) 19. Kb7 $18 {e.g.} Kd5 20. Be7 ( 20. Bb4) 20... Kc4 21. Bf8 Kd5 22. Kb6 Kc4 23. Bg7 Kb4 24. Bh6 Kc4 25. Bd2 Nd6 26. c7 $18 *

Section A2 no Theme Draws:

[Event "MT Mario García UAPA-Section A2"] [Site ""] [Date "2026"] [Round ""] [White "Hergert Volker, Switzerland"] [Black "1st-2nd prize"] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/8/5p2/4p1p1/7p/2k1PP1P/5P1K/8 w - - 0 1"] [PlyCount "24"] [EventDate "2024"] 
 {[#]} 1. e4 $1 {Black threatened both 1...f5 -+ and 1...e4 -+.} Kd2 2. Kh1 $1 ( 2. Kg2 $2 Ke2 $19) (2. Kg1 $2 Ke1 3. Kg2 Ke2 $19) 2... g4 $1 (2... Ke2 3. Kg2 $11) (2... Ke1 3. Kg1 $11) (2... Kd1 3. Kh2 $11) 3. hxg4 (3. fxg4 $2 Kd3 $19) 3... Ke2 4. f4 $1 (4. Kg2 $2 h3+ 5. Kg3 h2 6. Kxh2 Kxf3 $19) 4... exf4 5. Kg1 $1 (5. Kg2 $2 f3+ $19) (5. e5 $2 fxe5 6. g5 Kxf2 7. g6 f3 8. g7 Ke1 9. g8=Q f2 $19) (5. g5 $2 fxg5 6. e5 Kxf2 7. e6 g4 $19) 5... f3 (5... h3 6. e5 $1 (6. g5 $2 fxg5 7. e5 g4 8. e6 g3 9. fxg3 fxg3 10. e7 h2+ 11. Kg2 h1=Q+ 12. Kxh1 Kf2 13. e8=Q g2+ 14. Kh2 g1=Q+ 15. Kh3 Qg3#) 6... fxe5 7. g5 e4 8. g6 e3 9. fxe3 f3 10. g7 f2+ 11. Kh2 f1=Q 12. g8=Q $11) (5... Kf3 $4 6. g5 $1 fxg5 7. e5 $18) 6. g5 $1 (6. e5 $2 fxe5 7. g5 e4 8. g6 e3 9. g7 exf2+ 10. Kh2 f1=Q 11. g8=Q Qf2+ 12. Kh1 Qe1+ 13. Kh2 Qg3+ 14. Qxg3 hxg3+ 15. Kxg3 f2 $19) 6... fxg5 7. e5 g4 8. e6 g3 9. e7 gxf2+ 10. Kh2 f1=Q 11. e8=Q+ Kd2 (11... Kf2 12. Qe3+ $1 Kxe3 { Stalemate}) 12. Qe3+ $1 (12. Qd8+ $2 Qd3 $19) (12. Qd7+ $2 Qd3 $19) 12... Kxe3 {Stalemate} 1/2-1/2

[Event "MT Mario García UAPA-Section A2"] [Site ""] [Date "2026"] [Round ""] [White "Sergey Osintsev, Russia"] [Black "3rd prize"] [Result "1/2-1/2"] [SetUp "1"] [FEN "2rQ4/7N/1P6/1R6/2q5/k4n2/2pP1b1B/2K5 w - - 0 1"] [PlyCount "32"] [EventDate "2025"] [Source "ChessBase"] 
 1. Bd6+ (1. Qxc8 $6 Qf1+ $1 (1... Qxc8 $2 2. Bd6+ Ka4 $11) 2. Kxc2 Nd4+ $19) 1... Ka4 2. Rb4+ (2. Qxc8 $6 Qf1+ $1 3. Kxc2 Nd4+ 4. Kc3 Qc1+ $1 (4... Nxb5+ $2 5. Kb2 Bd4+ 6. Kc2 $11) 5. Kd3 Qxc8 6. Rb4+ Ka5 7. b7 Qc2#) 2... Qxb4 3. Qd7+ Qb5 4. Qa7+ $1 {White prefers to exchange on the adjacent square.} ({thematic try} 4. Qxb5+ $2 Kxb5 5. b7 Rh8 $1 6. Ng5 $1 Ne1 $1 {change of try and main line} (6... Nd4 $2 7. b8=Q+ {Position B with bKb5 - with check!} Rxb8 8. Bxb8 Kc4 9. Ne4 $11 (9. Ne6)) 7. b8=Q+ Rxb8 8. Bxb8 Bc5 $1 (8... Kc4 $2 9. Nf3 $1 Kb3 10. Nxe1 Bxe1 11. Bf4 $11) 9. Be5 {Position A1 with bKb5 - there is a move} Kc4 $1 10. Ne6 Bf2 $1 11. Kb2 (11. Bf4 Kb3 $1 $19) 11... Kd5 12. Bc3 Kxe6 13. d4 Be3 $19) 4... Qa5 5. Qxa5+ ({try} 5. Qd7+ $2 Kb3 $1 6. Qf7+ Rc4 (6... Ka4 $2 7. Qa2+ Kb5 8. Qxa5+ Kxa5 9. b7 {to main line}) 7. Qxf3+ Ka2 8. Qd3 Qa4 9. b7 Ba7 10. Ng5 Rd4 $1 (10... Qb3 $2 11. Qxb3+ Kxb3 12. Ne6 $11 (12. Nf3)) (10... Bb8 $2 11. Nf7 Bxd6 12. Nxd6 Rb4 $11) (10... Rh4 $2 11. Qxc2+ Qxc2+ 12. Kxc2 Rc4+ 13. Kd1 Rg4 $11) 11. Qc3 Qb3 12. Qxc2+ Qxc2+ 13. Kxc2 Rxd6 $19) 5... Kxa5 6. b7 Rh8 $1 7. b8=Q ({thematic try} 7. Ng5 $2 Nd4 $1 (7... Ne1 $2 {change of try and main line} 8. b8=Q Rxb8 9. Bxb8 {main line}) 8. b8=Q {Position B1 with bKa5 - without check!} Rh1+ $19) 7... Rxb8 8. Bxb8 Ne1 9. Ng5 Kb4 {Black changes the plan.} (9... Bc5 10. Be5 {Position A with bKa5, Black is forced to play} Ka4 11. Ne6 $1 (11. Bb2 $2 Kb3 $19) 11... Ba3+ 12. Bb2 Kb3 13. Nd4+ (13. Bxa3 $2 Nd3#) 13... Kc4 $11) 10. Nf3 $1 (10. Ne4 $2 Bd4 11. Bg3 Kb3 $1 12. Bxe1 Bb2#) 10... Kb3 $1 11. Nxe1 Bxe1 12. Bf4 (12. Bd6 $2 Bf2 13. Bb4 Bd4 14. Bc3 Bc5 (14... Bxc3 $2 15. dxc3 Kxc3 $11 {stalemate}) 15. Bb2 Bf8 16. Bh8 Ba3+ 17. Bb2 Bxb2#) 12... Bh4 13. Bg5 $1 Bg3 14. Bf4 $1 Bf2 15. Be3 Bh4 16. Bg5 Bxg5 $11 {ideal stalemate with Pawn-pin} 1/2-1/2

[Event "MT Mario García UAPA-Section A1"] [Site ""] [Date "2026"] [Round ""] [White "Alain Pallier, France"] [Black "2nd-3rd HM"] [Result "1/2-1/2"] [SetUp "1"] [FEN "6N1/1K4R1/1P6/1q5p/8/3p4/3k4/6N1 w - - 0 1"] [PlyCount "31"] [EventDate "2026"] 
 1. Nf6 $1 (1. Ne7 $2 Qd7+ $1 2. Ka8 Kc1 3. b7 (3. Nf3 Qa4+ 4. Kb7 Qe4+ 5. Nc6 Qxf3 $19) 3... Qa4+ 4. Kb8 d2 5. Ne2+ Kb2 $1 $19) (1. Nh3 $2 Qf5 $1 2. Ka7 Qxh3 3. b7 Qe3+ 4. Ka8 Qe4 5. Nf6 Qc6 6. Rd7 Kc2 7. Ka7 Qa4+ 8. Kb8 d2 9. Kc8 d1=Q 10. Rc7+ (10. Rxd1 Qc6+ $19) (10. b8=Q Qa6+ $19) 10... Kd2 {/d3} 11. b8=Q Qa6+ 12. Qb7 Qda4 $19) 1... Qf5 2. Nd7 $1 Kc2 3. Kc8 (3. Rg2+ $2 d2 4. Rxd2+ Kxd2 $19) 3... Qe4 {/d5} 4. Nh3 {with: a)} d2 ({b)} 4... Qc6+ 5. Kd8 Qa8+ 6. Kc7 d2 7. Rg1 (7. Nf2 $2 Qf3 8. b7 Qxf2 $19) 7... Qf3 8. b7 (8. Ng5 $2 Qf2 $19) 8... Qxh3 9. b8=Q Qh2+ 10. Kc8 $1 (10. Kd8 $2 Qxg1 11. Qc7+ Kd1 12. Nf6 Qd4+ $1 { and eg} 13. Ke7 Ke1 14. Qg3+ Qf2 $19) 10... Qxg1 11. Qc7+ Kd1 12. Nf6 $1 Qg6 ( 12... Qf1 13. Qc6 $1 Qf5+ 14. Kd8 Ke1 15. Qh1+ Ke2 16. Qg2+ {/Dh2=}) 13. Qd6 $1 (13. Qc6 $2 Qc2 $19) 13... Qf5+ (13... h4 14. Qf4 $11) 14. Kd8 h4 15. Nd5 $1 ( 15. Qc6 $2 Qd3+ 16. Ke7 Qe3+ 17. Kd8 h3 18. Ne4 Ke2 19. Nxd2 Qxd2+ $19) 15... Qg5+ 16. Kd7 $1 (16. Ke8 $2 h3 $1 $19) (16. Kc8 $2 Qg4+ $1 17. Kd8 Qd4 $1 18. Kc7 Kc1 19. Qa3+ Qb2 $19) 16... Qg4+ 17. Kc6 $1 Qc4+ 18. Kb6 $1 (18. Kd7 $2 Qd4 $19) 18... Qd4+ 19. Ka6 $1 (19. Ka5 $2 h3 20. Qc6 Qe5 $19) 19... h3 (19... Kc2 20. Nb4+ Kc3 21. Na2+ Kc4 22. Qb4+ $11) 20. Qc6 $1 Ke2 21. Qe6+ Kf2 22. Qf5+ Kg1 23. Qg5+ Kh1 24. Ne3 $1 $11) 5. Rg1 (5. Nf2 $2 Qf3 $19) 5... Qc6+ 6. Kd8 h4 (6... d1=Q 7. Rxd1 Kxd1 8. Nf4 h4 9. Nd3 $11) 7. Nf2 Qa8+ 8. Kc7 $1 (8. Ke7 $2 Qf3 $1 $19 {and not} (8... Qa3+ $2 9. Kd8 Qf3 (9... Qa8+ 10. Kc7 $1 $11) 10. Ra1 $1 Qxf2 11. b7 $11)) 8... Qf3 $1 9. Nd1 $1 h3 (9... Qf4+ 10. Kd8 Qe4 11. Kc7 h3 12. b7 h2 13. Rf1 h1=Q 14. Rxh1 Qxh1 15. Ne3+ Kd3 16. Ng4 $1 Kc3 17. b8=Q d1=Q 18. Nge5 $11) 10. b7 h2 11. Rf1 $3 h1=Q 12. Rxh1 Qxh1 13. Ne3+ Kd3 14. Ng4 $1 Qc1+ 15. Kd8 $1 (15. Kd6 $2 Qa3+ $19) 15... Qb2 16. b8=Q $11 1/2-1/2

[Event "MT Mario García UAPA-Section A2"] [Site ""] [Date "2026"] [Round ""] [White "Michael Pasman, Israel"] [Black "2nd-3rd HM"] [Result "1/2-1/2"] [SetUp "1"] [FEN "2N4r/n7/k3P1R1/3K3P/4r3/PP6/b7/8 w - - 0 1"] [PlyCount "27"] [EventDate "2026"] 
 1. e7+ $1 (1. Kxe4 $2 Bb1+ 2. Kf4 Bxg6 3. Nxa7 Rxh5 $19) 1... Ka5 (1... Kb7 $2 2. Nd6+) 2. Nd6 $1 (2. Kxe4 Nxc8 (2... Bb1+ 3. Kd5 Bxg6 4. Nxa7 Bxh5 $19)) 2... Rxh5+ {[#]} (2... Rxe7 $4 3. Nc4+ Kb5 4. Rb6#) 3. Rg5 $3 (3. Kxe4 $2 Bb1+ 4. Kf4 Bxg6 $19) 3... Reh4 $1 (3... Rxg5+ 4. Kxe4) (3... Rxe7 4. Nc4+ Ka6 5. Rxh5 $11) 4. Rxh5 (4. e8=Q $2 Rxg5+ 5. Ke6 Rh6+ 6. Kd7 Rg7+ 7. Nf7 Nc6 $19) 4... Bxb3+ {[#]} 5. Nc4+ $1 {Check on check} Bxc4+ 6. Kd6+ $1 {Check on check} Nb5+ $1 {Check on check} (6... Rxh5 7. e8=Q $11) 7. Kc6 Re4 {[#]} (7... Rxh5 8. e8=Q Bd5+ 9. Kd7 Rh7+ 10. Kd8 $11) 8. a4 $1 (8. Rh4 $2 Re6+ 9. Kd7 Rd6+ $1 10. Kc8 Be6+ $19) 8... Kxa4 9. Rh4 $1 Nc3 (9... Re6+ 10. Kd7 Rd6+ 11. Kc8 $11) 10. Rxe4 Nxe4 {[#]} 11. e8=N $3 (11. e8=Q $2 Bb5+ 12. Kd5 Nf6+ $19) 11... Bb5+ 12. Kd5 Nc3+ 13. Kd4 Ne2+ 14. Ke3 1/2-1/2

[Event "MT Mario García UAPA-Section A2"] [Site ""] [Date "2026"] [Round ""] [White "Polasek Jaroslav, Czechia"] [Black "spec. HM"] [Result "1/2-1/2"] [SetUp "1"] [FEN "k7/7P/1p4P1/p7/P7/1Pb5/8/3K4 w - - 0 1"] [PlyCount "34"] [EventDate "2026"] 
 1. b4 $3 {You'll see the point of this seemingly baffling move at the end of the solution. White is preparing a stalemate rescue.} (1. Kc2 $2 Bg7 ({or} 1... Bh8) 2. Kd3 (2. b4 Kb7 3. b5 Kc7 4. Kd3 Kd6 5. Ke4 Ke6) 2... Kb7 3. Ke4 Kc6 4. Kf5 Kd6) 1... Kb7 (1... b5 2. Kc2 $1 Bf6 3. Kb3) (1... axb4 2. Kc2 Kb7 3. Kb3 Ka6 4. g7 $1 (4. h8=Q $2 Bxh8 5. Kxb4 Bg7 6. Kb3 Ka5 7. Ka3 Bh6 8. Kb3 Bf8) 4... Bxg7 5. Kxb4 $11) 2. b5 $1 (2. Kc2 $2 Be5 (2... Bg7) (2... Bh8) 3. Kd3 Kc6 4. Ke4 Kd6 5. b5 Ke6) 2... Kc7 3. Ke2 $1 {White hurries to guard the g6-square The White king's next moves to a critical position is not unambiguous, but these are organic (harmless) duals.} Kd6 4. Kf3 ({or} 4. Ke3 Ke6 5. Kf4) 4... Ke6 5. Kf4 ({or} 5. Kg4) 5... Bf6 6. Kg4 $1 Ke5 7. Kh5 $1 Bg7 8. Kg5 ({or} 8. Kh4) ({or} 8. Kg4) 8... Ke6 9. Kh5 ({or} 9. Kg4 Kf6 10. Kh5 Kf5 11. h8=Q $1 Bxh8 12. Kh6 {and then as in the main line}) 9... Kf6 {[#] A critical position: White is losing the g6 pawn.} 10. h8=Q $1 {That's an unexpected rescue!} Bxh8 11. Kh6 Bg7+ ({Thanks to the b5-pawn, White can simply promote the queen after } 11... Ke5 12. g7 Bxg7+ 13. Kxg7 Kd5 14. Kf6 Kc5 15. Ke6 Kb4 16. Kd6 Kxa4 17. Kc6 Kb4 18. Kxb6 $11) 12. Kh7 Bf8 13. Kg8 Bb4 14. Kh7 $1 (14. g7 $2 Kg6 15. Kh8 Bc3 16. Kg8 Bd4) 14... Bf8 15. Kg8 Bh6 16. Kh7 Bg7 17. Kg8 Kxg6 {stalemate} 1/2-1/2

Section B1 (Theme miniatures Wins):

[Event "1.pr Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°31 - Sergey Osintsev"] [Black "Russia"] [Result "1-0"] [SetUp "1"] [FEN "R7/8/6K1/2B5/2r5/2p5/3k4/7N w - - 0 1"] [PlyCount "59"] [EventDate "2022"] 
 1. Be7 (1. Rd8+ $2 Ke2 $1 2. Ng3+ Kf3 3. Rd3+ Kg2 $1 4. Bd6 c2 $11) 1... c2 2. Bg5+ Ke2 3. Ra1 {White's Rook and Bishop took control of the pawn promotion square} Rg4 $1 4. Ra2 (4. Kf5 $2 Rxg5+ $1 5. Kxg5 Kd2 $11 {Sacrifice of a Rook followed by promotion of a pawn is Black counterplay}) 4... Rc4 (4... Rxg5+ $2 5. Kxg5 Kd3 6. Nf2+ Kc3 7. Ra3+ $1 Kb2 8. Re3 $3 c1=Q 9. Nd3+ $18) 5. Kh5 $1 ( 5. Kf5 $2 Kf3 6. Ra1 Rc5+ $1 $11) 5... Kf3 6. Ra1 Kg2 {The White Knight is blocked in the corner. How to win?} 7. Rc1 ({loss of a tempo} 7. Re1 $2 Rd4 ( 7... Rb4) 8. Rc1 Rd1 9. Rxc2+ Kxh1 10. Kg4 Rg1+ $1 {Position B1 with wKg4 - there is a check!} 11. Kf4 Rg2 $1 $11) 7... Rb4 ({or} 7... Rd4 8. Be3 $1) 8. Bh6 $3 {Main line} ({Logical try} 8. Be3 $2 {Position A1 with bRb4} Kf3 $1 9. Bg5 (9. Bd2 Rb1 10. Kh4 Ke2 11. Bf4 Rxc1 12. Bxc1 Kd1 $11) 9... Rb1 10. Kh4 Kg2 11. Rxc2+ Kxh1 {After losing the Knight the drawn endgame is Rook and Bishop vs Rook} 12. Kg4 Rg1+ {Position B1 with wKg4 - there is a check!} 13. Kf4 Rg2 $1 $11 ({no} 13... Rf1+ $2 14. Ke4 $1 Rg1 {Position B with Ke4 without a check! } 15. Bf4 $18)) ({Logical try} 8. Bd2 $2 Rb1 9. Rxc2 Kxh1 {Draw endgame Rook and Bishop vs Rook} 10. Kg4 Rb3 $1 {Position C4 with wBd2 and wKg4 - The Bishop has blocked the Rook, there is no move Re2 and no move Be3!} 11. Kf4 ( 11. Bf4 Kg1 $1 12. Re2 Kf1 $1 $11) 11... Rh3 $1 12. Ra2 Kg1 $1 13. Be3+ Kf1 $11 ) 8... Re4 ({Additional thematic line} 8... Rb1 9. Rxc2+ Kxh1 {After losing the Knight the winning endgame is Rook and Bishop vs Rook} 10. Kg4 $1 Rb3 { Position C with wBh6 - The Bishop will not block the Rook, there is a move Re2! } 11. Re2 $1 (11. Rd2 $2 Kg1 $1 $11) 11... Kg1 12. Be3+ Kf1 13. Kf3 Rd3 14. Rh2 $1 (14. Ra2 $2 Ke1 $11) 14... Ke1 15. Rh1#) 9. Bd2 $1 Rd4 10. Be3 $1 {Position A with bRd4. After the preliminary maneuver of the Bishop, the Black Rook is under attack. Main lineA} Re4 ({Main line B} 10... Rc4 11. Kg6 $3 {White paradoxically includes the King in the game!} ({loss of time} 11. Rg1+ $6 Kh2 12. Rf1 Kg2) 11... Re4 12. Bg5 Rb4 13. Kf5 $1 {c)} Rd4 ({d)} 13... Rb1 14. Rxc2+ Kxh1 {Winning endgame is Rook and Bishop vs Rook} 15. Ke4 $1 (15. Kg4 $2 Rg1+ 16. Kf4 Rg2 $1 $11) 15... Rg1 {Position B with wKe4 - no check! The Bishop is moving!} 16. Bf4 $1 Rg2 17. Rc1+ $1 Rg1 18. Rc3 $1 ({loss of time}  18. Rc8 Rg2 19. Rc1+ Rg1) 18... Re1+ 19. Kf3 (19. Be3 $2 Kg2 $1 20. Rc2+ Kg3 $1 $11) 19... Rf1+ 20. Kg3 Rg1+ 21. Kh3 Rg2 22. Bg3 ({loss of time} 22. Rc1+ Rg1 23. Rc3 Rg2) 22... Rh2+ 23. Kg4 (23. Bxh2 $2 $11 {stalemate}) 23... Ra2 24. Kf3 $18) 14. Be3 $1 Rb4 15. Bd2 Rb1 16. Rxc2 Kxh1 {Winning endgame is Rook and Bishop vs Rook} 17. Kf4 $1 (17. Kg4 $2 Rb3 $1 {Position C4 with wBd2 and wKg4 - no a move 18.Be3.} 18. Bf4 Kg1 $1 19. Re2 Kf1 $1 $11) 17... Rb3 {Position Ñ2 with wBd2 and wKf4 - there is a move Be3!} 18. Be3 $18) ({Additional line}  10... Rd3 11. Bf4 $1 Kf3 12. Bh6 $1 ({loss of time} 12. Rf1+ Kg2 13. Rc1 Kf3) 12... Rd1 13. Kh4 $1 Rxc1 (13... Rd4+ 14. Kh3 $18) (13... Kg2 14. Rxc2+ Kxh1) 14. Bxc1 Kg2 15. Ng3 $18 {The King saved the Knight}) 11. Rg1+ $1 Kh2 12. Bf2 $1 Rc4 13. Rc1 Kg2 14. Kg5 Rb4 15. Bg3 $1 {a)} Rd4 ({b)} 15... Rb1 16. Rxc2+ Kxh1 {Winning endgame is Rook and Bishop vs Rook} 17. Kg4 $1 Kg1 (17... Rb3 { Position C1 with wBg3 - The Bishop covers the King, there is a move Kh3!} 18. Kh3 Rb1 19. Rh2+ Kg1 20. Bf2+ Kf1 21. Rh1+ $18) 18. Bf2+ $1 (18. Kh3 $2 Rd1 $3 19. Rg2+ Kf1 20. Rf2+ Ke1 21. Ra2+ Kf1 $11) 18... Kf1 19. Kf3 Rb3+ 20. Be3 $18) 16. Kf5 (16. Rxc2+ $2 Kxh1 {Draw endgame Rook and Bishop vs Rook} 17. Bf4 Rd3 $1 {Position C5 with wKg5 and wBf4 - White is late!} 18. Kg4 Kg1 $1 19. Re2 Kf1 $1 $11) 16... Rb4 17. Be5 $1 Rb1 18. Rxc2+ Kxh1 {Winning endgame is Rook and Bishop vs Rook} 19. Ke4 $1 (19. Kg4 $2 Rb3 $1 20. Bg3 {Position C1 with wBg3 - The Bishop covers the King, but Black to move!} Kg1 $11) 19... Rb3 {Position C3 with wKe4 and wBe5 - there is a move Bc3!} (19... Re1+ 20. Kf4 Kg1 21. Bd4+ Kf1 22. Rf2+ Kg1 23. Kg3 $18) 20. Bc3 $1 Rb8 (20... Kg1 21. Kf3 Ra3 22. Kg3 Kf1 23. Rf2+ Kg1 24. Rf3 $18) (20... Rb5 21. Bd2 Kg2 22. Bf4+ Kh3 23. Kf3 Rb3+ 24. Be3 $18) 21. Bd2 $1 Rh8 22. Kf3 $1 Rh3+ 23. Kf2 Rh2+ 24. Kg3 Rg2+ 25. Kf3 Kh2 26. Bf4+ Kh1 27. Rc1+ Rg1 28. Rc3 Rf1+ 29. Kg3 Rg1+ 30. Kh3 $18 {White's coordinated play led to a winning Rook and Bishop vs. Rook endgame in multiple lines.}

[Event "3.pr Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°13 – Minski Martin"] [Black "Germany"] [Result "1-0"] [SetUp "1"] [FEN "5R1K/8/4b3/7k/7P/8/7Q/4q3 w - - 0 1"] [PlyCount "9"] [EventDate "2025"] 
 1. Rf6 $1 (1. Kg7 $2 Qa1+ $1 2. Kh7 $11 (2. Rf6 $4 Qa7+ $19)) 1... Qc3 ( 1... Qa1 2. Qe2+ Bg4 3. Qe7 Kxh4 4. Kh7 Qb1+ 5. Rg6+ Kh3 6. Qe3+ $18) (1... Qe4 2. Qb8 $18) 2. Kg7 $1 ({try} 2. Qf4 $2 Qc8+ 3. Rf8 Qc3+ 4. Kh7 Bg8+ $3 5. Kxg8 Qg7+ $1 6. Kxg7 {stalemate}) (2. Qe2+ $2 Bg4 3. Qe7 Kxh4 $11) 2... Qd4 ({main}  2... Bg4 3. Qc2 $3 {echo sacrifice} ({thematic try} 3. Qg3 $6 Qd4 $1 (3... Qxg3 $2 4. Rh6#) 4. Qd3 $1 Qa7+ $1 (4... Qxd3 $2 5. Rh6#) 5. Rf7 Qa1+ 6. Kg8 Qa8+ $11) 3... Qxc2 4. Rh6#) (2... Bb3 3. Qf4 $18) 3. Qe2+ Bg4 4. Qe4 $3 {the point} ({thematic try} 4. Qd3 $6 Qa7+ $1 (4... Qxd3 $2 5. Rh6#) 5. Rf7 Qa1+ 6. Kg8 Qa8+ $11) (4. Qf2 $2 Qd7+ $11) 4... Qxe4 (4... Qa7+ 5. Rf7 Qa1+ 6. Kg8 {/Kf8+-} ) 5. Rh6# {mate with self block on g4; inspired by the game Keymer - Hovhannisyan, FIDE Grand Swiss 2025, round 6, 111.Qf3+- (111.Qc6! Qxc6 112. Rh7# was possible)}

[Event "5 pr Sec. B1 – Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°14 – P. Arestov (Russia)"] [Black "Michal Hlinka (Slovakia)"] [Result "1-0"] [SetUp "1"] [FEN "4R3/4p3/3nk2K/8/8/2p5/8/6B1 w - - 0 1"] [PlyCount "27"] [EventDate "2026"] 
 1. Ra8 $1 {Try} (1. Rf8 $2 Ke5 $1 2. Kg5 Ke4 3. Bc5 Nc4 4. Rf4+ (4. Bxe7 c2 $11) 4... Kd5 5. Bxe7 c2 $11) 1... Kd5 2. Kg6 $3 {Try} (2. Kg5 $2 Ke4 $1 3. Ra7 e5 4. Rc7 Nb5 5. Rc5 Nd4 $1 6. Rxc3 Nf3+ $11) 2... Kc4 (2... c2 3. Be3) ( 2... Ke4 3. Ra7 $1 e5 4. Rc7 Nb5 5. Rc5 Nd4 6. Rxc3 $18 {6...Nf3 It's not check!}) 3. Be3 c2 4. Kg5 Kd3 5. Bc1 Ke2 6. Kg6 $3 {Try} (6. Kf4 $2 Kd1 $1 7. Ra1 Nc4 $1 $11) (6. Kg4 $2 Ne4 {/or} (6... Kd1)) 6... Kd1 (6... Nc4 7. Rh8 $1 Ne5+ 8. Kf5 Nd3 9. Rh2+ Kd1 10. Rh1+ $18 Ke2 11. Bh6 {or} (11. Bg5)) (6... Ne4 7. Rd8 $1) 7. Ra1 Nb5 $1 (7... Ne4 8. Bh6+ $1 Ke2 9. Kf5 $18) 8. Bh6+ $1 {try} (8. Bg5+ $2 Ke2 9. Kf5 Nd4+ 10. Ke4 Nf3 $1 $11 (10... Nb3 $2 11. Rh1 $1 $18 { Try})) (8. Bf4+ $2 Ke2 9. Kf5 Kd3 $1 10. Ke5 Nc3 $11) 8... Ke2 9. Kf5 Nd4+ ( 9... Kd3) (9... Nc3) 10. Ke4 Nb3 11. Rh1 $1 {Try} (11. Rg1 $2 Nd2+ 12. Kd5 e6+ $1 13. Kxe6 Nb3 14. Kd5 Kf2 $1 15. Rh1 Kg2 16. Re1 Kf2 {pos. draw}) 11... e6 12. Rh2+ Kd1 13. Kd3 $1 c1=Q 14. Rh1# {The white king enters the g6 square twice. 1) The white king plays 2.Kg6!! and avoids 2.Kg5? 2) then repeats the same move 6.Kg6!! and avoids 6.Kf4?}

[Event "1.hm Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°20 – Beat Neuenschwander"] [Black "Switzerland"] [Result "1-0"] [SetUp "1"] [FEN "8/4KP2/6P1/8/k7/4p3/2P5/4b3 w - - 0 1"] [PlyCount "19"] [EventDate "2025"] 
 1. g7 $1 (1. Kd7 $2 Bb4 2. g7 e2 3. g8=Q e1=Q $10 {because Qe8 is not a check}) (1. Kd8 $2 e2 2. f8=Q Ba5+ $10) 1... e2 2. g8=Q (2. f8=Q $2 Bb4+ 3. Kd7 Bxf8 4. gxf8=Q e1=Q $10) 2... Bb4+ 3. Kd8 $1 (3. Kd7 $2 e1=Q $10 {because Qe8 is not a check}) (3. Kf6 $2 Be7+ $1 (3... e1=Q $2 4. Qe8+ $18) 4. Kxe7 e1=Q+ {leads to perpetual check, e.g.} 5. Kf8 Qb4+ 6. Kg7 Qd4+ 7. Kh7 Qh4+ $10) 3... Be7+ (3... e1=Q 4. Qe8+ $1 $18) 4. Kd7 $1 e1=Q 5. Qe8 $1 {Pin and battery.} Qb4 6. Ke6+ $1 {Forcing the black king to step on a bad square.} (6. Qxe7 $2 Qb7+ {leads to perpetual check, e.g.} 7. Kd6 Qb4+ 8. Ke6 Qe4+ 9. Kf6 Qh4+ 10. Ke6 Qe4+ 11. Kd7 Qb7+ 12. Ke8 Qb8+ 13. Qd8 Qe5+ 14. Kf8 Qh8+ 15. Ke7 Qe5+ 16. Kd7 Qd5+) 6... Ka5 (6... Ka3 7. Qxe7 $18) 7. Qxe7 Qe4+ 8. Kd7 (8. Kf6 Qh4+ {loss of time}) (8. Kd6 Qb4+ {loss of time}) 8... Qb7+ 9. Ke8 (9. Kd8 Qb8+ {loss of time}) 9... Qb8+ 10. Qd8+

[Event "2.hm Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°30 – Michael Pasman"] [Black "Israel"] [Result "1-0"] [SetUp "1"] [FEN "7k/n2K4/5p2/6p1/4R3/8/8/8 w - - 0 1"] [PlyCount "23"] [EventDate "2026"] 
 1. Re7 $1 (1. Kd6 $2 Nb5+ 2. Kc5 Nc3 3. Re3 Nd1 4. Re1 (4. Rd3 Nf2) 4... Nf2) ( 1. Ra4 $2 Nb5 2. Kc6 Nc3) 1... Kg8 (1... g4 2. Ke6 Nc6 3. Rc7) (1... f5 2. Ke6 Nc6 3. Rc7) 2. Ke6 Nc6 (2... Nb5 3. Kxf6 Kf8 4. Rb7 Nd6 (4... Nc3 5. Rb8#) 5. Rb8+ Ne8+ 6. Ke6) 3. Rc7 Nd8+ $1 4. Ke7 (4. Kxf6 $2 Kf8 5. Rd7 (5. Rh7 Ke8 6. Rh8+ Kd7) 5... Ke8 6. Re7+ Kf8) 4... Kg7 5. Rd7 ({Logical Try 1:} 5. Kxd8+ $2 Kg6 6. Rc4 (6. Rc5 g4 7. Ke7 f5 8. Rc6+ Kg5) 6... Kf5 7. Ke7 g4 {Position T1.2, White Rook on c4 instead of g8}) 5... Kg6 (5... Nc6+ 6. Kd6+) 6. Rxd8 g4 7. Rg8+ ({Logical Try 2:} 7. Ke6 $2 Kg5 8. Rg8+ (8. Rd3 Kf4 9. Kxf6 g3) 8... Kf4 { Position T2.2, White King on e6 instead of f7}) (7. Rd5 $2 f5 8. Ke6 g3 9. Rd1 (9. Rd8 Kg5 10. Rg8+ Kf4 11. Kd5 Kf3) (9. Ke5 Kg5 10. Rd4 g2 11. Rd7 Kg4) 9... Kg5 10. Ke5 Kg4) 7... Kf5 {Position T1.1} 8. Kf7 (8. Rg7 $2 Kf4 9. Kxf6 g3 10. Ke6 Kf3) 8... Kf4 {Position T2.1} 9. Kg6 (9. Kxf6 $2 g3 10. Ke6 Kf3) 9... Kf3 ( 9... g3 10. Kh5) 10. Kh5 (10. Kf5 $2 g3) 10... g3 {Position T3.1} 11. Kh4 g2 12. Kh3 $18

[Event "3.hm Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°32 - Sergey Osintsev"] [Black "Russia"] [Result "1-0"] [SetUp "1"] [FEN "8/6N1/1R6/2n3P1/8/r7/4K3/7k w - - 0 1"] [PlyCount "27"] [EventDate "2025"] 
 1. g6 (1. Nh5 $2 Ne4 $1 2. g6 Ng3+ 3. Nxg3+ Rxg3 4. Kf2 Kh2 5. Rb7 (5. g7 Rg2+ $1 6. Kf3 Rxg7 $11) 5... Rg2+ $1 6. Kf3 Rxg6 $11) 1... Ne4 2. Re6 Ng3+ (2... Nc5 3. Rc6 Ne4 4. Ne6 $18) 3. Kf2 Kh2 4. Re5 $1 Nh1+ $1 (4... Ra2+ 5. Kf3 $18 ( 5. Ke3 $2 Rg2 $1 6. Rg5 Nf5+ $1 {fork} 7. Rxf5 (7. Nxf5 Rxg5 $11) 7... Rxg6 $11 )) (4... Ra6 5. Ne6 $18) 5. Ke1 $1 (5. Ke2 $2 Rg3 $11) (5. Kf1 $2 Rf3+ $1 6. Ke1 Ng3 $1 7. Ne6 Rf1+ $1 (7... Nf5 $2 8. Rxf5 $1 Rxf5 9. g7 $18) 8. Kd2 Nf5 9. Rxf5 Rxf5 10. g7 Rf2+ 11. Ke3 Rg2 $11) 5... Ra1+ ({Additional line} 5... Rg3 6. Re2+ $1 (6. Rh5+ $2 Kg1 $1 $11 (6... Kg2 $2 7. Nf5 $1 Rxg6 8. Nh4+ $18 {fork})) 6... Kg1 (6... Kh3 7. Nh5 (7. Ne6) 7... Rg1+ 8. Kd2 Rxg6 9. Nf4+ $18 {fork}) 7. Nf5 $1 Rxg6 (7... Rg4 8. g7 Ng3 $1 9. Rg2+ $3 Kxg2 10. Ne3+ $18 {fork}) 8. Nh4 Rg3 (8... Ng3 9. Nf3+ Kh1 10. Rh2#) 9. Rg2+ $1 Rxg2 10. Nf3# $1 {Ideal mate}) 6. Ke2 ({Try:} 6. Kd2 $2 Ra2+ $1 7. Ke3 Rg2 8. Re6 (8. Rh5+ Kg1 9. Rh6 Nf2 $1 $11) 8... Kh3 $1 (8... Ng3 $2 9. Kf3 $1 Kh3 10. Re8 $1 Kh2 11. Rh8+ Kg1 12. Rh6 $18) 9. Nf5 (9. Ne8 Ng3 $1 10. g7 Nf5+ $11 {fork}) 9... Kg4 $1 {Black King's Maneuver} 10. Re5 (10. Rf6 Kg5 11. Rf8 Ng3 $1 12. g7 Nxf5+ $11 {fork}) 10... Ng3 $1 11. Nh6+ Kh3 $1 12. g7 Nf1+ $11) 6... Ng3+ 7. Kf3 Rf1+ 8. Kg4 Rg1 9. Ne6 $1 (9. Kg5 $2 Ne2+ $1 10. Kh6 Nf4 $11) (9. Re6 $2 Ne2+ $11) 9... Ne4+ 10. Kf5 ( 10. Kh5 $2 Nf6+ $1 11. Kh6 Ng4+ $11 {fork}) 10... Nd6+ 11. Kf6 Ne8+ 12. Kf7 Nd6+ 13. Kg7 Ne8+ 14. Kh6 $18 {White King's Maneuver}

[Event "4.hm Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°27 – Polasek Vlasak"] [Black "Emil Vlasak, Czech"] [Result "1-0"] [SetUp "1"] [FEN "5k2/4p3/3p2P1/8/4B3/8/8/K7 w - - 0 1"] [PlyCount "19"] [EventDate "2007.08.07"] 
 1. Bd5 $1 (1. Kb2 $2 {missing the possibility to change bishops diagonal} Kg7 $1 2. Kc3 d5 $1 3. Bf5 (3. Bc2 e5 $1 4. Bf5 e4 $1) 3... e6 $3 4. Bc2 e5 $1 5. Bf5 e4 6. Kd4 (6. Kd2 $5 Kg8 {or other move on the 8th rank} (6... Kf6 $2 7. Ke2 $3 Kg7 8. Ke3 Kf6 9. Kf4) 7. Ke2 Kf8 8. Kf2 Kg8 9. Ke3 Kg7 10. Kf4 Kf6) 6... Kf6 7. Ke3 Kg7 8. Kf4 Kf6 { mutual zugzwang}) ({Thematic try} 1. Bc6 $6 Kg7 2. Be8 d5 (2... e5) 3. Kb2 e5 4. Kc3 e4 $1 (4... Kf6 $2 5. Kd3 Kg7 6. Bf7 Kf6 7. Ke2 $1 (7. Kd2) 7... Kg7 8. Ke3 Kf6 9. Kf3 Kg7 10. Kg4 e4 11. Kf4 Kf6 12. Be8) 5. Kd4 Kf6 6. Ke3 Kg7 7. Kf4 Kf6 {mutual zugzwang} 8. Bf7 Kg7 9. Kg5 $2 e3) 1... Kg7 2. Bf7 e5 3. Kb2 d5 4. Kc3 e4 $1 (4... Kf6 5. Kd3 (5. Kd2) (5. Be8) 5... e4+ 6. Ke3 $1 Kg7 7. Kf4 Kf6 8. Be8) 5. Kd4 Kf6 6. Ke3 ({or switch moves} 6. Be8 Kg7 7. Ke3 Kf6 (7... Kf8 8. Bf7 (8. Bd7 Kg7 9. Bf5) 8... Kg7 9. Kf4 Kf6 10. Be8) 8. Kf4) 6... Kg7 7. Kf4 { mutual zugzwang} Kf6 8. Be8 $1 Kg7 9. Kg5 $1 (9. Kf5) 9... e3 (9... Kf8 10. Kf6 ) 10. Bb5

[Event "c. Sec. B1 – Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°8 - Hergert Volker"] [Black "Switzerland"] [Result "1-0"] [SetUp "1"] [FEN "3n4/8/3KP1k1/8/8/5p2/1NP5/8 w - - 0 1"] [PlyCount "33"] [EventDate "2025"] 
 1. Nd3 $1 {For now, White should keep e5 under control.} (1. Nd1 $2 Kf6 2. e7 Nf7+ 3. Kd7 Ne5+ (3... f2 4. e8=N+ Ke5 $1 5. Nxf2 Kd4 6. Nd1 Ne5+ 7. Kc7 Nc4 8. Nd6 Na3 $11) 4. Kd6 Nf7+ 5. Kd7 Ne5+ $11) (1. e7 $2 Nf7+ 2. Kd7 f2 $11) 1... Kf6 2. e7 Nf7+ 3. Kd7 f2 $1 4. e8=N+ $1 (4. e8=Q $2 f1=Q $11) (4. Nxf2 $2 Ne5+ 5. Kd6 (5. Kd8 Nc6+ $11) 5... Nf7+ 6. Kd7 Ne5+ $11) 4... Kf5 5. Nxf2 Ne5+ 6. Kc7 $1 (6. Ke7 $2 Kf4 7. Nd6 Ke3 8. Nde4 Nc4 $11 9. Kd7 Kd4 10. c3+ Kd5) (6. Kd6 $2 Nc4+ 7. Kc5 (7. Kd5 Ne3+ $11) 7... Na3 $1 (7... Ne3 $2 8. c3 $18) 8. c3 Nb1 $11) 6... Kf4 (6... Nc4 7. Nd6+ Nxd6 8. Kxd6 $18) (6... Ke6 7. Nd6 $18) 7. Nd6 Ke3 8. Nde4 Kd4 (8... Nc4 9. Kc6 Kd4 10. c3+ $18) 9. c3+ Kc4 10. Kd6 Nf7+ ( 10... Nf3 11. Nd1 $18) 11. Ke6 Ng5+ $1 12. Kf5 (12. Ke5 $2 Nf3+ $11) 12... Nf3 13. Nd1 $1 Nd4+ (13... Ng1 14. Ke5 $1 $18) 14. Ke5 $1 Ne2 (14... Nf3+ 15. Kf4 $18) (14... Nc6+ 15. Kd6 $18) 15. Nb2+ $1 {The knight finishes its roundtrip  (b2-d3-f2-d1-b2) and returns to its starting square, sacrificing itself exactly there for the decisive tempi gain.} (15. Nd2+ $2 Kc5 16. c4 Nd4 17. Nb2 Nc6+ 18. Ke4 Na5 $11) (15. Nd6+ $2 Kc5 $11) (15. Ne3+ $2 Kd3 $11) 15... Kb3 ( 15... Kb5 16. c4+ $18) 16. c4 $1 (16. Nd1 $2 Nxc3 $11) 16... Kxb2 17. c5 $18 { The pawn is unstoppable.}

[Event "c. Sec. B1 – Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°15 – Rainer Staudte"] [Black "Michael Schlosser, Germany"] [Result "1-0"] [SetUp "1"] [FEN "8/p1K5/k7/8/2p3p1/B7/1P6/8 w - - 0 1"] [PlyCount "21"] [EventDate "2026"] 
 1. Kc6 Ka5 (1... g3 2. Bd6 g2 3. Bh2 Ka5 4. Kc5 c3 5. bxc3 $18) (1... c3 2. bxc3 $18) 2. Kc5 (2. Bd6 $2 Ka4 $1 {and White pawn falls soon}) (2. Kd5 $2 Kb5 $1 {finally, the a-pawn rushs to a3}) 2... c3 (2... Ka4 3. Kxc4 $18) 3. bxc3 Ka4 4. Bc1 Kb3 5. c4 a5 (5... g3 6. Kd5 $1 (6. Be3 $2 a5 $1 7. Kd5 a4 8. c5 a3 9. c6 a2 10. Bd4 g2 $11) 6... a5 7. c5 a4 8. c6 a3 {transposes to mainline} ( 8... g2 9. Be3 a3 10. c7 a2 11. c8=Q a1=Q 12. Qc4+ $18 {Por ej:} Ka3 (12... Kb2 13. Bd4+) 13. Bc1+)) 6. Kd5 $1 (6. Kd4 $2 {[%emt 0:00:00]} g3 $1 7. c5 g2 $1 8. Be3 a4 $1 9. c6 a3 $1 10. c7 a2 11. c8=Q a1=Q+ $11) (6. Kb5 $2 a4 $1 7. c5 a3 $1 8. Bxa3 (8. c6 a2 $1 9. c7 a1=Q 10. c8=Q $11 {Por ej:} Qa4+ 11. Kb6 Qb4+ { perpetual check or queen exchange}) 8... Kxa3 $1 9. c6 g3 $1 10. c7 g2 $1 11. c8=Q g1=Q $11) 6... a4 (6... g3 7. c5 a4 {transposes to mainline}) 7. c5 g3 ( 7... a3 8. Bxa3 g3 9. Bc1 g2 10. Be3 $18) 8. c6 a3 (8... g2 9. Be3 a3 10. c7 a2 11. c8=Q a1=Q 12. Qc4+ Ka3 (12... Kb2 13. Bd4+ $18) 13. Bc1+ $18) 9. c7 a2 10. c8=Q a1=Q 11. Qc4#

[Event "c. Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°19- Alain Pallier"] [Black "France"] [Result "1-0"] [SetUp "1"] [FEN "5k2/2n5/8/8/8/1P4KB/1P6/8 w - - 0 1"] [PlyCount "27"] [EventDate "2026"] 
 1. Kf4 Na6 (1... Ke7 2. Ke5 Na6 3. Kd5 $18 {and the main solution like in main line after 5. Rd5}) 2. Bf1 $1 (2. Ke5 $2 Nc5 $1 3. Be6 Ke7 $1 4. Bc4 Nb7 {(Rd7) } 5. Kd5 Kd7 {(Cb7)=}) 2... Nc7 $1 {Back on c7} 3. Ke5 Ke7 4. Bh3 $1 {Back on h3. Not 4. b4? Rd7 5. b5 Ca8! drawing.} (4. b4 Kd7 5. b5 Na8) 4... Na6 $1 { Back on a6.4... Rd8 5. Rd6 Cb5+ 6. Rc5+-. Now begins a curious journey by white king.} (4... Kd8 5. Kd6 Nb5+ 6. Kc5 $18) 5. Kd5 Nb4+ 6. Kc4 Nc2 $1 (6... Nc6 7. Kc5 $18) 7. Kc5 $1 (7. Kd5 $2 Kd8 $1 8. Kd6 (8. Bf5 Ne3+ $1 9. Ke4 Nc2 10. Kd5 (10. Kd3 Nb4+ 11. Kc4 Nc6 $11) 10... Ne3+ {Positional draw}) 8... Ne3 $1 9. Be6 (9. Kc6 Nd1 10. b4 Nxb2 11. b5 Ke7 $1 12. b6 Nc4 $11) 9... Nc2 $1 ( 9... Nd1 $2 10. b4 $18) 10. Kc6 (10. Bh3 Ne3 $1 11. Be6 (11. Kc6 Nd1 $1 12. b4 Nxb2 13. b5 Ke7 $1 14. b6 Nc4 $11) 11... Nc2 {Positional draw}) 10... Nd4+ 11. Kd6 Nc2 $1 12. Kc6 Nd4+ {Positional draw}) (7. Kc3 $2 Ne1 $1 8. Kd2 Nf3+ $11) 7... Kd8 8. Kb6 $1 Ne3 $1 9. Kb7 $1 Ke7 10. Kc6 $1 Nc2 11. Bg2 $1 Nd4+ 12. Kc5 {(d5)} Nxb3+ 13. Kc4 Nc1 14. Bf1 $1 {(back on f1) and White wins. 14. b4? Ce2=}

[Event "c. Sec. B1 Min Win "] [Site "Union Argentina de Problemist"] [Date ""] [Round ""] [White "N°24 – Ivan Bondar"] [Black "Belarus"] [Result "1-0"] [SetUp "1"] [FEN "8/8/8/8/k3rpr1/1R3K2/5P2/8 w - - 0 1"] [PlyCount "17"] 
 1. Rb2 $1 ({(It is not possible to win inmediately with} 1. Rb1 $2 Rg2 $1 2. Kxg2 Re2 3. Kf3 Rd2 4. Rf1 Kb5 5. Kxf4 Kc6 6. Kf5 Kd7 $1 $11 {First defensive line. Therefore, White's first move eliminates it)}) 1... Ka3 {(Black forces the white rook to leave the second rank. However, after Ra3, the black king cannot reach the saving square b5 with the further route c6-d7)} 2. Rb1 $1 ({( } 2. Rb8 $2 Rg2 $1 3. Kxg2 Re2 4. Kf3 (4. Rf8 Kb4 $1 5. Rxf4+ Kc5 $11) 4... Rc2 $1 5. Rf8 Kb4 6. Rxf4+ Kc5 $1 $11 {Second defensive line)}) 2... Rg2 $1 3. Kxg2 Re2 4. Kf3 Rd2 5. Rf1 $3 (5. Rb5 $5 Rc2 $1 6. Rf5 Kb4 $1 7. Rxf4+ Kc5 $11) (5. Re1 $2 Kb4 $1 6. Re2 Rd8 $1 $11) 5... Rd4 (5... Kb4 6. Kxf4 $18) 6. Re1 $1 ({ (6.Rb1 Rd2-Repetition of position;} 6. Kg4 $2 Kb4 $1 7. Rc1 Kb5 $1 $11) (6. Rg1 $2 Kb4 $1 $11 {)}) 6... Kb4 7. Re4 $1 {The second defensive line is overcome by exchanging rooks!} (7. Re5 $2 Rd2 $1 8. Re2 Rd8 $1 $11) 7... Kc5 8. Rxd4 $1 Kxd4 9. Kxf4 $18