www.arves.org - UAPA 20th 2023

Studies awarded for the 20th UAPA 2023 tournament.

Section Theme A

[Event "1/2 p.UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023"] [Round ""] [White "Jan Sprenger"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "5q2/R4Bpp/8/5k1K/8/6PP/5Pb1/6R1 w - - 0 1"] [PlyCount "24"] [EventDate "2023"] 
 1. g4+ {The only move that does not lose on the spot.} (1. Ra5+ $2 Kf6 2. Rxg2 Qxf7+ 3. Kh4 Qb7 4. Rg1 Qb4+ $19) (1. Rxg2 $4 g6+ 2. Kh4 Qh6#) 1... Kf4 2. g5 $1 ({The ending after} 2. Rxg2 $2 Qc5+ 3. g5 Qxa7 4. Rg4+ Kf3 5. Bd5+ Kxf2 6. Rf4+ Kg3 7. Rf3+ Kh2 $19 {is lost.}) 2... g6+ 3. Kh4 Qc5 4. Ra4+ Kf3 5. Bd5+ $1 Qxd5 6. Rg4 Bh1 $1 {[thematic move] Black disturbs the coordination of the white rooks before implementing his main plan.} ({Black's logical try} 6... h5 $6 7. Rg3+ Kxf2 {fails because the white rooks are connected:} 8. R3xg2+ { /R1xg2+} Qxg2 9. Rxg2+ Kxg2 {stalemate}) ({correction try} 6... Bf1 $5 7. Rxf1 h5 8. Rg3+ Ke2 9. Rgg1 Qf3 10. Re1+ Kd2 11. Rd1+ Kc2 12. Rc1+ $10) 7. Rxh1 h5 $1 (7... h6 8. Rg3+ Kxf2 9. Rh2+ Kf1 10. Rhg2 h5 11. Rg1+ Kf2 12. R1g2+ {/R3g2+ } Qxg2 13. Rxg2+ Kxg2 {stalemate}) 8. Rg3+ (8. gxh6 $4 Qh5#) (8. Ra4 $2 {eg} Kg2 9. Rha1 Qf3 $19) 8... Kxf2 (8... Ke2 $5 9. Re3+ $1 (9. Rh2 $2 Qe4+ 10. f4+ Kf1 11. Rh1+ Qxh1 12. Rg2 {eg} Qxg2 {no stalemate}) 9... Kxf2 10. Rhe1 Qd4+ 11. Re4 Qd3 12. R1e2+ {/Re3 with transposition} Qxe2 13. Rxe2+ Kxe2 14. Kg3 Ke3 15. Kh4 $1 Kf4 {stalemate}) 9. Rh2+ (9. Rg2+ $2 Kxg2 $1 { shows the difference to the try 6... h5: Black can take on g2 with the king.} ( 9... Qxg2 $2 10. Rh2 $10)) 9... Kf1 { Now Qe4+ looks lethal, but White still has a shot:} 10. Rh1+ $1 { [thematic move] The first rook sacrifice draws the queen to h1...} Qxh1 11. Rg2 $3 {...and the second closes the door behind her!} Ke1 12. Rg1+ $1 Qxg1 { [stalemate] Both Black and White sacrifice a piece in the corner. The Rg2 tactic and the final position is based on Sprenger & Minski, Neidze MT 2021:  https://eg.org.ua/chessgame/minskim-sprengerj-0270-45g4e2/}  1/2-1/2

[Event "3/4 p UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023.04.10"] [Round ""] [White "Harold van der Heijden"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "2n5/3K4/8/8/8/1N6/1PP5/1k6 w - - 0 1"] [PlyCount "29"] [EventDate "2023"] 
 {[#]} 1. Na1 $1 (1. Kxc8 $2 Kxc2 $11) 1... Nb6+ (1... Kxb2 2. Kxc8 $18) 2. Kc6 Nc4 (2... Na4 3. b3 Nc3 4. b4 Kxa1 5. b5 Kb2 6. b6 $18) 3. b4 (3. b3 $2 Na3 4. b4 Kxa1 5. b5 Kb2 (5... Kb1) 6. b6 Nc4 7. b7 Na5+ $11) 3... Kxa1 4. Kc5 (4. b5 $2 Kb2) 4... Ne5 5. Kd5 (5. Kd6 $2 Nc4+ 6. Kc5 Ne5 {repeats}) 5... Nd7 6. c4 ( 6. Kc6 $2 Ne5+ 7. Kd5 (7. Kd6 Nc4+ 8. Kc5 Ne5 {repeats}) 7... Nd7 {repeats}) 6... Kb2 7. c5 (7. b5 $2 Kb3 8. c5 Kb4 9. c6 Nb6+ $11) 7... Kb3 (7... Kc3 8. c6 Nb6+ 9. Kc5 Na4+ 10. Kb5 $18) 8. c6 (8. b5 $2 Kb4 $11 (8... Ka4)) 8... Nb6+ 9. Kc5 Na4+ (9... Na8 10. b5 Ka4 11. b6 Ka5 12. b7 {wins, e.g.} Nc7 13. b8=Q (13. Kd6 Nb5+) 13... Na6+ 14. Kd6 Nxb8 15. c7) 10. Kb5 $1 Nc3+ 11. Ka5 $1 Nd5 ({main } 11... Kc4 12. c7 Nd5 13. c8=Q+ {excelsior}) ({or similary} 11... Ne4 12. b5 Kc4 13. b6 Kc5 14. b7 Kxc6 15. b8=Q $18) 12. b5 Kc4 13. b6 Kc5 14. b7 (14. c7 $2 Nxb6 $11) 14... Kxc6 (14... Nb4 15. c7 {e.g.} Nc6+ 16. Ka4 $18) 15. b8=Q { excelsior} 1-0

[Event "1.hm. UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023"] [Round ""] [White "Serhiy Didukh"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "b5R1/3Np3/1p5k/8/1n2p3/r1p3P1/6P1/6RK w - - 0 1"] [PlyCount "21"] [EventDate "2023"] 
 1. Nf8 Ra5 2. Ra1 $3 {(thematic move)} ({Logical try} 2. Rg6+ $2 Kh5 3. g4+ (3. Ra1 Rxa1+ 4. Kh2 Ra2 $1 5. Kh3 Rxg2) 3... Kh4 4. g3+ Kh3 $19) (2. g4 $2 Rg5 $19 ) 2... Rxa1+ (2... Rg5 3. Rxg5 Kxg5 4. Rxa8 e3 (4... c2 5. Rc8) 5. Ne6+ Kf5 6. Nf4 $18) (2... Rh5+ 3. Kg1 Bd5 4. Rg6#) 3. Kh2 Rh1+ $1 {(thematic move)} (3... Ra5 4. Rg6+ Kh5 5. g4+ Kh4 6. g3#) 4. Kxh1 e3 (4... Nd3 5. Rg6+ Kh5 6. g4+ Kh4 7. Kh2 Ne5 8. g3#) 5. Rg6+ (5. g4 $2 Be4 $19) 5... Kh5 6. Kh2 $1 (6. g4+ $2 Kh4 7. Kh2 Bxg2 $1 $19) 6... Bxg2 7. Kxg2 Nd3 (7... e2 8. Kh3 e1=Q 9. g4#) 8. Rg8 $1 (8. g4+ $2 Kh4 9. Kf3 Ne5+ $1 $11) (8. Rg7 $2 e2 9. g4+ Kh4 10. Ng6+ Kg5 $1 $11) 8... e2 9. g4+ Kh4 10. Ng6+ Kxg4 11. Ne5+ $18 {Lepuschutz theme (Ñ->Ð-/ +Ð1/4Ð~/= Ñ\/Ð?Ñ Ð3/4Ð+/=Ð3/4Ñ()Ð,Ñ Ð3/4Ð+/=Ð~/=Ð1/2Ð1/2Ð3/4Ð=/+Ð3/4 Ñ Ð~/=Ñ/ \Ð~/=).} 1-0

[Event "2.hm UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023.01.14"] [Round ""] [White "Jan Timman"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "7k/2p2p2/3p2pK/PN1b4/pq3P2/2R4p/1PP1P1p1/Q5n1 w - - 0 1"] [PlyCount "21"] [EventDate "2023"] 
 1. Rc4 $1 Nf3 $1 (1... Qb3 2. Rxc7 f6 3. cxb3 h2 4. Nxd6 (4. Qc1 $2 h1=Q+ 5. Kxg6 Qh3 $11) 4... h1=Q+ 5. Kxg6 Qh3 6. Rc8+ Bg8 (6... Qxc8 7. Nxc8 Nxe2 8. Kxf6 $18) 7. Nf7#) 2. exf3 (2. b3+ $2 Ne5 3. fxe5 Qd2+ $19) (2. Rxb4 $2 h2 3. Qh1 Ne5 4. Qxh2 Ng4+ $19) 2... Qc3 $1 3. Rxc3 $1 (3. bxc3 $2 h2 4. Qh1 g1=Q 5. Rxc7 f6 6. Nxd6 Bg8 7. Re7 a3 8. Re8 Qa7 $11) 3... h2 4. Qh1 $1 {Theme} g1=Q $1 5. Rxc7 f6 6. Nxd6 Bg8 $1 7. Rd7 $1 ({Try:} 7. Re7 a3 $1 8. bxa3 g5 9. Re8 (9. f5 g4 $1 10. Re8 Qa7 11. Kh5 $1 Qg1 $1 12. Kh6 $11) (9. Re1 Qa7 10. Kg6 Qg7+ 11. Kf5 Bh7+ 12. Ke6 Bg8+ $11) 9... Qa7 10. Kg6 Qg7+ 11. Kf5 Qd7+ 12. Kxf6 Qxd6+ 13. Kxg5 Qg6+ $1 14. Kh4 Qxe8 $11) (7. Rc8 $2 Qa7 $11) 7... g5 (7... Qg3 8. Ne4 $18) 8. Rd8 Qa7 9. Kg6 Qg7+ 10. Kf5 Qh7+ 11. Kxf6 $18 1-0

[Event "3.hm UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023.04.27"] [Round ""] [White "Ivan Bondar & Mikhail, Khramtsevich"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/3p4/2bP4/8/n3p3/1K2PP2/N7/3k1B2 w - - 0 1"] [PlyCount "25"] [EventDate "2023"] 
 1. Nb4 $1 Nc5+ (1... exf3 2. Nxc6 $18) (1... Kd2 2. Nxc6 $1 $18) 2. Kc4 Nb7 3. Nxc6 Nxd6+ (3... dxc6 4. d7 $1 $18) 4. Kd5 (4. Kc5 $2 Ne8 5. Nd4 Ke1 6. Bc4 exf3 7. Nxf3+ Kf2 $11) 4... Nf5 5. Kxe4 $1 (5. Bh3 $2 dxc6+ 6. Kxe4 Ng3+ 7. Kf4 Ne2+ 8. Ke4 Ng3+ $11) (5. Ba6 $2 exf3 $11) (5. fxe4 $2 Nxe3+ $11) (5. Nd4 $2 Nxe3+ 6. Kxe4 Nxf1 $11) 5... Ng3+ 6. Kd3 $1 (6. Kf4 $2 Nxf1 $11) 6... dxc6 7. Bg2 $1 (7. Bh3 $2 Nh1 $1 8. Bg4 Nf2+ 9. Kd4 Kd2 $1 10. e4 Nd3 $1 11. e5 c5+ $1 12. Ke4 c4 $1 13. e6 c3 14. e7 c2 15. e8=Q c1=Q $11) 7... c5 (7... Ke1 8. f4 $1 c5 $1 9. Bb7 $1 Kf2 10. e4 $1 Kf3 (10... Nh5 11. f5 $1 Kg3 12. Ke3 $1 Nf6 13. e5 $18) 11. f5 $1 Kf4 12. f6 $18) 8. e4 c4+ $1 (8... Ke1 9. Bh3 $1 Kf2 10. Bg4 $1 $18) 9. Kc3 $1 (9. Kxc4 $2 Ke2 10. e5 Kf2 $1 11. Bh1 (11. Bh3 Kxf3 $11) 11... Nxh1 12. e6 Ng3 $1 13. e7 Nf5 14. e8=Q Nd6+ 15. Kd5 Nxe8 $11) 9... Ke2 10. e5 $1 (10. f4 $2 Kf2 $1 11. f5 Kxg2 12. f6 Nxe4+ $11) 10... Kf2 (10... Nf5 11. Kxc4 $18) 11. Bh1 $1 {move thematic} (11. Bh3 $2 Kxf3 $11) (11. Kxc4 $2 Kxg2 $11) 11... Nxh1 12. e6 Ng3 13. e7 $18 1-0

[Event "4.hm UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023.04.26"] [Round ""] [White "Pavel Arestov"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/1n5r/Q5B1/8/2pK4/8/6p1/3n3k w - - 0 1"] [PlyCount "23"] [EventDate "2023"] 
 1. Be4 $1 (1. Bxh7 $2 g1=Q+ 2. Kxc4 Qg4+ {/c5} 3. Kb5 Nc3+ 4. Kb6 Nd5+ 5. Ka7 Qd4+ 6. Kxb7 Qg7+ $19) 1... Rd7+ (1... Kh2 2. Bxg2 $11) 2. Bd5 $1 {Self-pin} ( 2. Kxc4 $2 Nd6+ 3. Kd4 Nxe4+ $19) (2. Ke5 Re7+ 3. Kd4 Rxe4+ 4. Kxe4 Nc5+ {fork} ) 2... Rxd5+ $1 (2... Kh2 3. Qh6+ $11) 3. Kxd5 Ne3+ $1 (3... g1=Q 4. Qh6+ Kg2 5. Qg6+ Kf1 6. Qxg1+ Kxg1 7. Kxc4 $11) 4. Kd4 Nf5+ $1 (4... g1=Q 5. Qxb7+ Ng2+ 6. Kxc4 $11) 5. Kc3 $1 (5. Kxc4 $2 Nbd6+ (5... Nfd6+ $2 6. Kb4 g1=Q 7. Qc6+ Kh2 8. Qc2+ $11) 6. Kb4 g1=Q 7. Qc6+ Kh2 8. Qc2+ Kg3 $19) 5... Nfd6 $1 (5... Nbd6 6. Qa8 $1 Kh2 7. Qh8+ Kg3 8. Qe5+ Kf3 9. Qh2 $1 Ng3 10. Kb4 $1 $11) 6. Kb4 $1 ( {Try:} 6. Qa1+ $2 g1=R $1 (6... g1=Q $2 7. Kb4 $11 {main line}) 7. Qb2 Nc5 $1 8. Kb4 Nd3+ {fork}) ({Try:} 6. Qc6 $2 Kh2 7. Qf3 g1=Q 8. Qh5+ Kg3 9. Qg5+ Kf2 10. Qf4+ Ke2 11. Qd2+ Kf3 $1 $19) 6... g1=Q (6... g1=R 7. Qa2 {/c6=}) 7. Qa1 $1 {Theme} Nc5 (7... Qxa1 $11 {stalemate}) 8. Qh8+ $1 Qh2 (8... Kg2 9. Qg7+ $1 Kf1 10. Qa1+ $1 Kg2 11. Qg7+ {echo-posiitional draw [%emt 0:00:01]}) 9. Qa1+ Kg2 10. Qb2+ $1 Kh3 11. Qh8+ Kg2 (11... Kg3 12. Qe5+ $11) 12. Qb2+ $11 { echo-posiitional draw [%emt 0:00:02]} 1/2-1/2

[Event "2.c. UAPA 20th Ty sec.A (tt) "] [Site ""] [Date "2023.04.25"] [Round ""] [White "Yochanan Afek"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "2k5/2p5/2qP4/1pP5/8/K3Q3/2r4P/R7 w - - 0 1"] [PlyCount "21"] [EventDate "2023"] 
 1. d7+ $1 Qxd7 (1... Kxd7 2. Qd3+ $18) 2. Kb3 $1 Rc4 (2... Re2 $5 3. Qxe2 (3. Ra8+ $2 Kb7 4. c6+ Kxa8 $1 5. cxd7 Rxe3+ 6. Kc2 Re2+ 7. Kd3 Rxh2 $1 8. d8=Q+ Kb7 {draw!}) 3... Qd5+ 4. Kb2 $1 Qd4+ 5. Kb1 $1 Qb4+ 6. Qb2 Qe4+ 7. Qc2 Qb4+ 8. Kc1 Qe1+ 9. Qd1 Qc3+ 10. Kb1 $1 Qb4+ 11. Ka2 Qa5+ 12. Kb3 $18) (2... Rxh2 3. Ra8+ Kb7 4. c6+ $1 Kxc6 (4... Qxc6 5. Qa7#) 5. Ra6+ Kb7 (5... Kd5 6. Qd3+ $18) 6. Qa7+ Kc8 7. Qa8#) 3. c6 $1 ({Logical try:} 3. Ra8+ $2 Kb7 4. c6+ Kxc6 5. Ra6+ Kd5 6. Qg5+ Ke4 $1 $11) 3... Qxc6 (3... Rxc6 4. Ra8+ Kb7 5. Qa7#) 4. Ra8+ $3 {(Thematic!)} Qxa8 (4... Kd7 5. Qe8+ Kd6 6. Rd8+ Kc5 7. Qe3+ $18) 5. Qe8+ Kb7 6. Qxb5+ Ka7 (6... Kc8 7. Qe8+ Kb7 8. Qxa8+ Kxa8 9. Kxc4 $18) 7. Qa5+ Kb8 8. Qxa8+ (8. Qb5+ $2 Qb7 $1 9. Qxb7+ Kxb7 10. Kxc4 Kc6 $11) 8... Kxa8 9. Kxc4 Kb7 10. h4 Kc6 11. h5 $18 1-0

Section B1: No Theme, Win studies

[Event "1 p. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023.04.13"] [Round ""] [White "Michael Gromov & Oleg Pervakov"] [Black "Dedicated to G. Kasparov"] [Result "1-0"] [SetUp "1"] [FEN "1q6/p4p2/1p3p1P/5p1K/p4P2/Pk3P1b/N1NP4/2R5 w - - 0 1"] [PlyCount "47"] [EventDate "2023"] 
 {# Dedicated to 13-th World Chess Champion Garry Kasparov (60 years 13.04.2023) } 1. Nab4 $1 (1. Ncb4 $2 a5 $11) 1... Bg4+ $1 {Fighting for the e4-square} ({ Too early} 1... Qxf4 2. Na1+ $1 Kxa3 3. Nac2+ Kb3 4. Rb1+ Kc4 5. Na3+ $1 Kd4 6. Nb5+ Kc4 7. d3+ $1 Kc5 8. d4+ Kc4 9. Na3+ Kxd4 10. Rd1+ $1 $18 { followed by forks}) (1... Qd8 2. Rb1+ Kc4 3. Ne3+ Kb5 (3... Kc5 4. Rc1+ Kd6 5. Ned5 $18) 4. Nbd5+ Kc5 5. Rg1 $18) (1... Qg8 2. Nd4+ Kb2 3. Nd3+ Ka2 4. Rc2+ Ka1 5. Rb2 $18) 2. fxg4 (2. Kh4 $2 Bxf3 3. Nd4+ Kxa3 4. Nd3 Ka2 $1 5. Nxf3 Qg8 $11) 2... Qxf4 $1 {The best defence. But now the queen has occupied a minefield To realize the main plan White must eliminate three pawns: a3, d2 and f5} (2... a5 3. Nd4+ Kxa3 4. Nd3 Ka2 5. Rc2+ Ka1 {(a3)} 6. Rb2 $18) (2... Qg8 3. Rb1+ Kc4 4. Ne3+ Kd4 5. Nxf5+ Kc4 6. Ne7 $18) 3. Na1+ $1 ({Try} 3. Rb1+ $2 Kc4 4. Ne3+ Kd4 5. Nxf5+ Kc4 $1 6. d3+ Kc5 7. d4+ Kc4 $19) 3... Kxa3 (3... Kb2 4. Nd3+) 4. Nac2+ Kb3 5. Rb1+ Kc4 6. Ne3+ $1 ({Try} 6. Na3+ $2 Kd4 7. Nb5+ Kc4 8. d3+ Kc5 $1 9. d4+ Kc4 10. Na3+ Kxd4 11. Rd1+ Ke4 $1 12. Re1+ Kd4 13. Nb5+ Kc4 14. Re4+ fxe4 $1 $19) 6... Kd4 7. Nxf5+ Kc4 8. Ne3+ $1 ({Try} 8. d3+ $2 Kc5 $1 9. d4+ Kc4 10. Ne3+ Qxe3 $1 $19) 8... Kd4 9. Nec2+ Kc4 10. Na3+ $1 ({ Try} 10. d3+ $2 Kc5 11. d4+ Kd6 $1 $19) 10... Kd4 11. Nb5+ Kc4 12. d3+ $1 { Just in time!} Kc5 (12... Kxb5 13. Nd5+) 13. d4+ Kc4 {13...Kd6??} 14. Na3+ $1 Kxd4 15. Rd1+ $1 {Realizing the main plan} Ke4 $1 (15... Kc3 {(e3)} 16. Nd5+) ( 15... Kc5 {(e5)} 16. Nd3+) 16. Re1+ Kd4 (16... Kf3 17. Rf1+) 17. Nb5+ Kc4 18. Re4+ $1 Qxe4 19. Nd6+ Kxb4 20. Nxe4 a3 21. Nc3 $1 { 13-th and decisive move of the hero knight!} (21. h7 $2 a2 22. h8=Q a1=Q 23. Qf8+ Ka5 $1 24. Ng3 Qa2 25. Kh6 Qa4 $11) 21... Kxc3 22. h7 a2 23. h8=Q a1=Q 24. Qxf6+ {Victory in the 24-th game of the second match with Karpov brought Garry Kasparov the title of 13-th World Chess Champion} 1-0

[Event "3 p. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023.04.30"] [Round ""] [White "Yuri Bazlov"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "1R2Kn2/4PN2/8/3P1kN1/8/4r3/3q4/8 w - - 0 1"] [PlyCount "31"] [EventDate "2023"] 
 1. Ne4 $1 Rxe4 $1 (1... Qxd5 2. Nfd6+ $1 Ke6 3. exf8=N+ $1 Ke5 4. Ng6+ Kd4 5. Rb4+ Kd3 6. Nf4+ Kc2 7. Nxd5 $18) (1... Ng6 2. Nfd6+ Kg4 3. Nxd2 Nxe7 4. Rb4+ Kh3 5. Kf7 $18) 2. Nd6+ Kg6 $1 3. Nxe4 Qf4 $1 4. Rb6+ $1 (4. exf8=N+ $2 Kf5 5. Rb4 Qe5+ 6. Ne6 $1 Qxd5 $11) 4... Kg7 $1 5. Kd8 $1 (5. Nf6 $2 Qa4+ $1 6. Kd8 Qa5 (6... Qa8+ $2 7. Kc7 Qa7+ 8. Rb7 Qc5+ 9. Kb8 Qd6+ 10. Kc8 Qc5+ 11. Rc7 $18) 7. Ne8+ Kg8 $11) 5... Qxe4 6. e8=N+ Kh8 $1 (6... Kg8 7. Nf6+ $18) 7. Rh6+ Kg8 $1 (7... Nh7 8. Nf6 $1 {The position is interesting for its economy. The d5 pawn covers the king from the chess, the knight protects it, and a full exchange of pieces leaves White with a passing pawn. Black can move to the knight endgame} Kg7 9. Nxe4 Kxh6 10. d6 $11) (7... Qh7 8. Rxh7+ Kxh7 9. Ke7 Ng6+ 10. Kf6 Nf4 11. d6 $18) 8. Nf6+ Kg7 9. Nxe4 $1 Kxh6 10. d6 $1 Ng6 $1 11. Kd7 $1 { The king blocks his own passing pawn, preventing it from moving forward.} Kg7 $1 12. Ng5 $1 Kf6 $1 13. Kc7 $1 Ne5 14. Nf3 $1 Nxf3 15. d7 Ng5 16. d8=Q+ $18 { and there is no saving double attack of 14...Nf6+, because the black king is under the check!} 1-0

[Event "2.hm. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023.12.31"] [Round ""] [White "Petromir Panaiotov"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "5qb1/8/4R1pp/2p1p1NP/5pk1/3K4/Q1P2P2/8 w - - 0 1"] [PlyCount "13"] [EventDate "2022"] 
 {[#]} 1. Ne4 $1 (1. Rxg6 $2 c4+ $1 (1... Bxa2 2. Nh7+ Kxh5 3. Nxf8 $18) (1... Qd8+ 2. Ke2 Bxa2 3. Nf7+ $1 Kxh5 4. Rxh6+ Kg4 5. Nxd8 $18) 2. Ke2 hxg5 3. f3+ Kxh5 4. Qa6 Bd5 5. Rf6 Qg7 6. Qd6 e4 7. fxe4 Qa7 $11) 1... Qf5 2. Rxg6+ Qxg6 $1 3. f3+ (3. Qxg8 $2 Qxg8 4. Nf6+ Kf3 $1 5. Nxg8 e4+ 6. Kc3 Kxf2 7. Nxh6 e3 8. Ng4+ Kf1 9. Nh2+ Ke2 10. h6 Kf2 $1 11. h7 e2 12. Ng4+ Kf1 13. h8=Q e1=Q+ 14. Kb2 Qb4+ $11) 3... Kf5 $1 (3... Kxf3 4. hxg6 Bxa2 5. Nd2+ Kf2 6. c4 $18) (3... Kxh5 4. Qxg8 Qxg8 5. Nf6+ Kg5 6. Nxg8 h5 7. Ne7 h4 8. Ke2 h3 9. Kf2 e4 10. fxe4 Kf6 11. Nc6 $1 $18) 4. Qa8 $1 Qa6+ $1 (4... Qe6 5. Qf8+ Bf7 6. Ke2 Qc4+ 7. Ke1 Qb4+ 8. Kf2 Qd4+ 9. Kg2 Ke6 10. Qxh6+ $18) (4... Bc4+ 5. Kc3 $1 Qxh5 6. Nd6+ Ke6 7. Nxc4 $18) 5. Qxa6 Bc4+ 6. Kd2 $1 (6. Kxc4 $11 {stalemate}) (6. Qxc4 $11 {Stalemate idea from recent Gurgenidze study. Here it has a flaw.}) 6... Bxa6 7. Ke1 $1 $18 {Domination over the black bishop.} (7. c4 $2 Bxc4 $1 8. Nd6+ Kg5 9. Nxc4 Kxh5 $11) 1-0

[Event "5.hm. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023"] [Round ""] [White "Eduard Eilazyan"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/p7/b4p2/1p6/k1P5/4BK2/B7/8 w - - 0 1"] [PlyCount "35"] [EventDate "2023"] 
 1. c5 $1 Bb7+ (1... b4 2. c6 b3 3. Bb1 Bc8 4. Bxa7 Kb5 5. c7 Kc6 6. Bb8 $18) 2. Ke2 (2. Kf4 $2 b4 $1 3. Be6 Bc6 4. Bd4 b3 5. Bxf6 Ka3 $11) 2... b4 3. Bf7 $1 ({ Try} 3. Be6 $2 b3 $1 4. Bd7+ Ka3 5. c6 Ba6+ 6. Kd2 b2 7. Bc5+ Kb3 $1 8. Bf5 Bc8 $1 9. Be4 Be6 $1 10. c7 a5 11. Bd5+ Bxd5 12. c8=Q b1=Q $11) 3... b3 4. Be8+ Ka3 5. c6 Ba6+ (5... Bc8 6. Bc5+ $1) 6. Kd2 b2 7. Bc5+ Kb3 (7... Ka2 8. Bf7+ $1 Ka1 9. Bd4 $18) 8. Bg6 (8. Bf7+ Ka4 9. Kc2 Kb5 $11) 8... f5 (8... Bc8 9. c7 $1 a5 10. Bf7+ $1 $18) 9. Bxf5 Bc8 $1 {The black bishop is sacrificed to distract the white bishop from the pawn promotion square.} 10. Bh7 $1 ({Try:} 10. Be4 $2 Be6 $1 11. c7 a5 $1 12. Bd5+ Bxd5 13. c8=Q b1=Q $11) (10. Bg6 $2 Be6 11. c7 a5 12. Bf7 Bxf7 13. c8=Q b1=Q 14. Qb7+ Ka2 15. Qxf7+ Qb3 $11) 10... Be6 11. c7 a5 12. Bg8 $1 {The counter sacrifice of the white bishop, carried out with a similar purpose. Theme: changing the functions of pieces.} Bxg8 13. c8=Q b1=Q 14. Qxg8+ $18 {and wins, for example} Kb2 15. Qc4 Qa2 16. Qc2+ Ka1 17. Bd4+ Qb2 18. Qxb2# 1-0

[Event "2.c. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023.04.22"] [Round ""] [White "Oleg Pervakov"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/K4B2/1Np5/p7/3p4/p1k1B3/P1p5/3n4 w - - 0 1"] [PlyCount "23"] [EventDate "2023"] 
 {Dedicate to Lena Novoselskaya} 1. Na4+ $1 (1. Bc1 $2 Nb2 $1 2. Bg5 Nd3 $11) 1... Kb4 (1... Kd3 2. Bc1 $18) 2. Bd2+ (2. Bc1 $2 Kxa4 3. Kb6 Kb4 4. Bd2+ Nc3 $1 $11) 2... Kxa4 3. Kb6 (3. Bb3+ $2 Kb5 4. Bxc2 Nc3 $11) 3... Nc3 4. Bxc3 (4. Bb3+ $2 Kb4 5. Bxc2 Kc4 $1 6. Bb3+ Kd3 7. Bc1 a4 8. Bf7 Kc2 $11) 4... dxc3 5. Kc5 $1 (5. Bb3+ $2 Kb4 6. Bxc2 c5 $1 7. Kc6 Kc4 8. Kd6 Kd4 $11) 5... c1=N { Phoenix} 6. Bg6 Nb3+ 7. Kc4 Nd2+ 8. Kxc3 Nf3 (8... Nf1 9. Bc2+ Kb5 10. Bd3+) 9. Be4 Ne5 10. Kd4 $1 Ng4 (10... Nd7 11. Bxc6+) 11. Kc5 Ne5 12. Bc2# (12. Bf5 $2 Nd3+ 13. Bxd3 $11 {Karen Sumbatyan's commentary: The wife is the principal enemy of the endgame study. She can hardly watch the head of the family meditating over chess instead of bringing home the bacon. Any time my wife Lena sees the chessboard squares and chess pieces, she cannot help grunting: b6 - a4 again? I'm used to this strange question from a person who has never played chess, but the other day it dawned on me: this is a knight's move! Oleg could not give this finding a miss and dedicates the study with a fateful first move in Lena's life at her birthday. Lena loves Oleg very much, makes fun of his love stories, but not of poetry - she enjoys it. There is only one thing she cannot understand - drinking vodka for breakfast.}) 1-0

[Event "3.c. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023.04"] [Round ""] [White "Michael Pasman"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/2B1p3/k7/3K4/7p/n7/4P1P1/8 w - - 0 1"] [PlyCount "31"] [EventDate "2023"] 
 1. Bf4 $1 (1. Bd8 $2 Nc2 $11) (1. Ke4 $2 Nc2 $11) 1... Nc2 (1... Kb7 2. Bg5 $18 ) 2. Bd2 $1 {Bishop on knight domination} (2. Bg5 $2 Ne1 $11) 2... Kb6 (2... Kb5 3. e4 {as main}) 3. e3 $3 {zz Festina Lente, mutual zugzwang !} (3. Kc4 $2 Na3+ $11) (3. e4 $2 Kc7 $11) 3... Kb5 (3... Kc7 4. Kc4 $1 $18) 4. e4 $1 Kb6 5. e5 (5. Ke6 $2 Kc5 $1 6. Kxe7 Kd4 $11) 5... Kc7 6. Ke6 Kd8 7. Kf7 Kd7 8. e6+ Kd6 9. Bc3 $1 (9. Bf4+ $2 Kd5 10. Kxe7 Nd4 $11) (9. Bg5 $2 Nd4 10. Bxe7+ Kd5 $11) 9... Ne3 10. Bb4+ Kd5 11. Bxe7 $1 ({Thematic try :} 11. Kxe7 $2 Nxg2 12. Kd7 h3 13. Bd6 Ne3 $1 14. e7 Ng4 $1 15. Be5 $1 Kxe5 $1 (15... Nxe5+ 16. Kc7 $11) 16. e8=Q+ Kf4 $1 17. Qb8+ (17. Qa8 Kg3 18. Ke6 h2) (17. Ke6 h2 18. Qb8+ Kf3 $11) 17... Kf3 $11 18. Qb3+ Kg2 $11) 11... Nxg2 12. Bg5 $1 h3 13. Bf4 $1 (13. e7 $2 h2 $11) 13... Nxf4 14. e7 h2 15. e8=Q $18 {Excelsior with Festina Lente} h1=Q 16. Qa8+ 1-0

[Event "4.c. UAPA 20th sec.B.1.win"] [Site ""] [Date "2023"] [Round ""] [White "Eduard Eilazyan"] [Black "Dedicated to G. Kasparov"] [Result "1-0"] [SetUp "1"] [FEN "8/6p1/2pPPn2/5kP1/6q1/1Q6/1p4N1/1Kb5 w - - 0 1"] [PlyCount "25"] [EventDate "2023"] 
 1. d7 $1 (1. gxf6 $2 Qe4+ 2. Qc2 Qxc2+ 3. Kxc2 Kxf6 4. e7 Kf7 5. Nh4 Bg5 6. Ng6 Bf6 $11) 1... Nxd7 (1... Ne4 2. d8=Q $1 Nd2+ 3. Qxd2 Bxd2 4. e7 Qe2 5. Qf3+ Qxf3 6. Nh4+ $18) (1... Qe4+ 2. Qc2 $1 Nd5 3. Ne3+ $1 Bxe3 4. Qxe4+ Kxe4 5. d8=Q Bc1 6. Qxd5+ Kxd5 7. e7 Bxg5 8. e8=Q $18) 2. e7 $1 (2. exd7 $2 Qe4+ 3. Qc2 Qxc2+ 4. Kxc2 Bxg5 $19) 2... Qh5 (2... Qxg2 3. Qf7+ Nf6 4. e8=Q $18) 3. Qf3+ $1 {Queen sacrifice} ({Try:} 3. Qd3+ $2 Kxg5 $1 4. Ne3 Nf6 $1 5. Qf5+ Kh6 $1 6. Ng4+ Qxg4 7. Qxg4 Nxg4 8. e8=Q $11) 3... Qxf3 4. Nh4+ Kxg5 (4... Kg4 5. Nxf3 Kxf3 6. e8=Q Nc5 7. Qf8+ Kg4 8. Qxc5 $18) 5. Nxf3+ Kf4 6. e8=Q {Phoenix theme} Nf6 7. Qe2 $1 {White must save the knight to win!} (7. Qxc6 $2 Ne4 $1 8. Kc2 Kxf3 $11) 7... Ne4 $1 8. Qd3 $1 c5 9. Kc2 $1 (9. Qb3 $2 g5 10. Qf7+ Kg3 11. Kc2 Nc3 12. Nd2 Bxd2 13. Kxb2 Ne4 $11) 9... c4 10. Qf1 $1 (10. Qd1 $2 b1=Q+ 11. Kxb1 Nc3+ $11) (10. Qe2 $2 b1=Q+ 11. Kxb1 Nc3+ $19) 10... Kg3 11. Qh1 $1 (11. Nd4 $2 b1=Q+ 12. Kxb1 Nd2+ 13. Kxc1 Nxf1 $11) 11... Nf2 (11... Kf2 12. Nh4 Nd2 13. Qh2+ Ke3 14. Qe5+ Kf2 15. Kd1 b1=Q 16. Qe1#) (11... g5 12. Nd4 Nd2 13. Ne2+ Kg4 14. Nc3 $18) 12. Qh5 $1 g6 13. Qd5 $1 $18 {Reincarnation theme: a Queen is sacrificed for the sake of a new Queen! There are 13 pieces and 13 moves in the study.13 is Kasparov's number.} 1-0

Section B1: No Theme, Draw studies

[Event "1/2 p UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023"] [Round ""] [White "Michal Hlinka & Luboš Kekely"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/8/k2K2n1/2n1B1P1/6P1/8/B7/7r w - - 0 1"] [PlyCount "23"] [EventDate "2022"] 
 1. Bc4+ (1. Bd4 $2 Ne4+ 2. Ke6 Nxg5+ 3. Kf5 Nh4+ 4. Kxg5 Nf3+ $19 {fork}) (1. Kxc5 $2 Nxe5 2. Kd6 Nxg4 $19) 1... Ka5 $1 2. Bc3+ (2. Bf6 $2 Ne4+ 3. Ke6 Kb4 4. Ba2 Rf1 5. Kf7 Ne5+ 6. Ke6 Nxg4 $19) (2. Bd4 $2 Ne4+ 3. Ke6 Kb4 $19) 2... Kb6 ( 2... Ka4 3. Kxc5 $11) 3. Bd4 {pin} Rd1 {pin} 4. Bd5 $1 {unpin} Nf4 (4... Rxd4 { model stalemate}) (4... Rc1 5. Bf7 Rd1 6. Bd5 $11) 5. Bxc5+ {selfpin of Bd5} Kb5 6. Bd4 $1 {switchback, unpin of Bd5} (6. Ke5 $2 Nxd5 $19) 6... Rxd4 {pin} 7. Ke5 {unpin} Kc5 (7... Rxd5+ 8. Kxf4 Kc6 9. g6 Rd8 10. Kf5 Kd6 11. Kf6 Rf8+ 12. Kg5 Ke7 13. g7 Rg8 14. Kg6 Ke6 15. g5 $11) (7... Ra4 8. Be4 $11) 8. Be4 $1 (8. Bf7 $2 Nd3+ 9. Kf5 (9. Kf6 Rf4+ 10. Ke7 Rxg4 11. g6 Nf4 12. Kf6 Nh5+ $19) 9... Kd6 10. g6 Rf4+ 11. Kg5 Ke7 $19) 8... Ne6 9. Kxe6 Rxe4+ 10. Kf5 (10. Kf6 $2 Rf4+ 11. Ke6 Rxg4 $19) 10... Re1 (10... Kd5 11. g6 $11) 11. g6 (11. Kf6 $2 Kd6 $19) 11... Kd6 12. g7 1/2-1/2

[Event "1/2 p UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023"] [Round ""] [White "Serhiy Didukh"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "4k2r/2B5/2N3P1/5p2/p1pp1Pp1/1p1P2P1/3P1NP1/4K3 w k - 0 1"] [PlyCount "18"] [EventDate "2023"] 
 1. Be5 $1 {White lets the black pawn promote.} ({After} 1. Kd1 $2 a3 2. g7 (2. Be5 c3 $1 3. dxc3 a2) 2... Rg8 3. Nxd4 a2 4. Nxb3 cxb3 5. Be5 Kf7 6. Kc1 { the rook forces the bishop into the a1-corner} Ra8 $1 ({not} 6... Rc8+ $2 7. Kb2 Ra8 8. Kxb3 $1 a1=Q 9. Bxa1 Rxa1 10. Kc2 Rg1 11. Nd1 $11) 7. Ba1 { and prevents its incarceration by the king} Re8 $1 (7... Rc8+ $2 8. Kb2 Rc2+ 9. Kxb3 Rxd2 10. Nh3 $1 $11) 8. Kd1 (8. Nd1 Re1 $19) 8... Rc8 9. d4 Rc2 10. Nd3 Kxg7 11. Ke2 b2 12. Nxb2 Rc1 $19) 1... b2 2. Bxh8 b1=Q+ 3. Nd1 (3. Ke2 $2 c3 $1 4. g7 Qa2 $1 $19) 3... Qxd3 4. g7 $1 (4. Nxd4 $2 Qxg3+ $19) (4. Bxd4 $2 Qe4+ 5. Ne3 Qxc6 $19) 4... Kf7 $1 (4... Qxg3+ $4 5. Nf2 Kf7 6. Ne7 $18) (4... Qe4+ 5. Ne3 $1 Kf7 6. Nxd4 $11) 5. Ne5+ Kg8 6. Nxd3 cxd3 { and it's a 3-mover by Albert Renn (1969)} 7. Nf2 a3 8. Nh1 $1 a2 9. Kf2 a1=Q $11 {stalemate. Bishop and Knight failed in the try, so White put them in the corners like teachers do with bad pupils.} 1/2-1/2

[Event "3/4 p.UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023"] [Round ""] [White "Eduard Eilazyan"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "7n/3ppr2/2P5/8/4P2k/B2K4/2p1N3/4b3 w - - 0 1"] [PlyCount "26"] [EventDate "2023"] 
 1. c7 $1 (1. cxd7 Ba5 $19) 1... c1=Q (1... Rf3+ 2. Kxc2 Rxa3 3. c8=Q Ng6 $11) 2. Nxc1 Rf3+ 3. Kd4 $1 (3. Ke2 $2 Rc3 4. Bxe7+ Kg4 5. Nb3 Rxc7 6. Kxe1 Kf3 $19) 3... Bc3+ (3... Rc3 4. Bc5 d6 5. c8=Q e5+ 6. Kd5 Rxc5+ 7. Qxc5 dxc5 8. Nd3 Bc3 9. Nxe5 $11) 4. Kd5 (4. Kc4 $2 Ba5 $19) 4... e6+ 5. Kd6 $1 Be5+ $1 6. Kxe5 (6. Kxd7 $2 Bxc7 7. Bb2 Rf7+ 8. Kxe6 Rh7 $19) 6... Nf7+ 7. Kd4 e5+ (7... Rxa3 8. c8=Q e5+ 9. Kd5 $1 Ra5+ 10. Qc5 Rxc5+ 11. Kxc5 $11) 8. Kd5 $1 (8. Kc4 $2 Rxa3 9. c8=Q Nd6+ 10. Kb4 Nxc8 11. Kxa3 Kg4 $19) 8... Rc3 9. Bc5 Rxc1 10. c8=Q Rd1+ 11. Bd4 $1 (11. Kc4 $2 Nd6+ 12. Bxd6 Rc1+ 13. Kd5 Rxc8 14. Bxe5 Rc6 $19) 11... Rxd4+ 12. Kc5 Rc4+ 13. Kd5 $1 (13. Kxc4 $2 Nd6+ 14. Kd5 Nxc8 $19) 13... Rxc8 { stalemate} (13... Rxe4 14. Qf8 $1 Rd4+ 15. Kc5 d6+ 16. Kc6 $11 {(EGTB)}) 1/2-1/2

[Event "5. p. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.04.13"] [Round ""] [White "Alain Pallier"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6N1/2K5/1P1p2R1/1p6/3N4/2np1R2/3qp2k/8 b - - 0 1"] [PlyCount "36"] [EventDate "2023"] 
 1... Nd5+ $1 (1... e1=Q 2. Rf5 $11) 2. Kb7 $1 e1=Q 3. Rf5 $1 (3. Rf7 $2 Qg2 $1 4. Rh7+ Kg1 5. Nf3+ Kf2 6. Rxg2+ Kxf3 $19) 3... Nf4 $1 (3... Qg2 4. Rxg2+ Kxg2 5. Rxd5 $11) 4. Nf3+ $1 (4. Rh6+ $2 Kg2 5. Rg5+ Kf2 {/Qg3-+}) 4... Kh3 $1 5. Ng1+ $1 (5. Nxd2 $2 Nxg6 $19) 5... Qxg1 6. Rxg1 Qf2 (6... Qe3 7. Rfg5 $11) 7. Rh1+ $1 (7. Rb1 $2 Qg2+ 8. Kc7 Qc2+ $19) (7. Rf7 $2 Kh2 8. Rg6 Qf3+ $19) (7. Rfg5 $2 Kh2 $1 8. Nf6 d2 9. Rb1 Qe1 10. Ng4+ Kg3 11. Ne3+ Kf3 12. Rb3 Ke2 $19) 7... Kg2 8. Rb1 $1 Qc2 (8... Qe3 9. Nf6 d2 10. Rfxb5 Qd3 11. Rg5+ Kf2 12. Rgg1 $11) 9. Rb4 $1 (9. Rfxb5 $2 d2 10. Kb8 d1=Q 11. Rxd1 Qxd1 12. Rg5+ Kf3 13. b7 Qa4 $19) (9. Rg5+ $2 Kf2 10. Rgxb5 d2 11. Kb8 d1=Q 12. Rxd1 Qxd1 $19) 9... d2 $1 10. Rbxf4 $1 d1=Q 11. Nf6 (11. Rg5+ $2 Kh3 $1 12. Nf6 Qh1+ $19) 11... Qde2 $1 12. Kb8 $1 (12. Rg5+ $2 Kh3 13. Kb8 b4 14. Rxb4 Qf3 $19) 12... Kg3 13. b7 $1 b4 14. Ka7 (14. Nh5+ $2 Kh3 15. Rf3+ Kg2 $19) (14. Rf1 $2 b3 $19) 14... Qe3+ ( 14... Qa2+ 15. Kb8 Qae6 (15... Qac2 16. Ka7 Qa2+ 17. Kb8 $11 { draw positional n~/=1}) 16. Ka8 Q6e3 17. Ne4+ Qxe4 18. Rxe4 Qxe4 19. Rb5 $11) 15. Kb8 Qee2 (15... Qxf4 16. Nh5+ $1 Kh2 17. Rxf4 b3 18. Rh4+ $1 $11) 16. Ka7 Qa4+ (16... Qe3+ {draw positional n~/=2} 17. Kb8) 17. Kb8 Qac2 (17... d5 18. Rd4 $1 Qa1 19. Nh5+ {/Rb4=}) 18. Ka7 Qa4+ 19. Kb8 $11 {draw positional n~/=3} 1/2-1/2

[Event "hm. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023"] [Round ""] [White "Serhiy Didukh"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "6Q1/b2p1r2/8/4P3/8/7n/3p3K/1k6 w - - 0 1"] [PlyCount "18"] [EventDate "2023"] 
 {Black could win here without his knight, but he can't win with it.} 1. Qg4 Bg1+ $1 {The guilty man is forced to leave the board. But the move of the bishop to the other edge has a drawback that will save White later.} ({ Knight can work to pay his debt} 1... Nf2 2. Qb4+ Kc1 3. Qc4+ Kd1 { and it's a perpetual because the clumsy man interefed with the rook!} 4. Qf1+ $1 Kc2 5. Qc4+) 2. Kxh3 Rh7+ 3. Kg2 $1 Rg7 4. Qxg7 d1=Q 5. e6 $1 dxe6 6. Qg6+ Qc2+ {The plan to win the last black pawn ran into the counter check. White swithes to his plan B.} 7. Kh1 $1 Kc1 (7... Qxg6 {stalemate.}) (7... e5 8. Qb6+ $1 Bxb6 {stalemate.}) 8. Qg5+ (8. Qxe6 $2 Qh2#) 8... Qd2 9. Qc5+ $1 Bxc5 { stalemate. Model stalemates with the change of control over g1 and h2 squares by Queen and Bishop.} 1/2-1/2

[Event "hm. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.02.06"] [Round ""] [White "Pavel Arestov"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/7P/2P1p3/2k3K1/8/5p2/8/3q4 w - - 0 1"] [PlyCount "16"] [EventDate "2023"] 
 1. h8=Q Qd2+ $1 (1... f2 2. Qf8+ {/c3} Kxc6 3. Qxf2 $11) (1... Qg1+ 2. Kf4 f2 3. Qe5+ $1 Kb6 4. Qe3+ Kc7 5. Qe5+ Kxc6 6. Qxe6+ $11) 2. Kg4 f2 (2... Qg2+ 3. Kf4 f2 4. Qc3+ $1 Kd6 (4... Kb6 5. Qb3+ Kxc6 6. Qxe6+ $11) 5. Qa3+ $1 $11) 3. Qf8+ (3. Qf6 $2 Qd1+ {/e2-+}) (3. c7 $2 Qd1+ $1 4. Kg3 Qg1+ $19) 3... Kxc6 4. Qf3+ $1 (4. Qc8+ $2 Kb5 $1 5. Qb7+ Kc4 $19) (4. Kg3 Qd6+ $1 5. Qxd6+ Kxd6 $19) 4... Kd6 $1 (4... Kc5 5. Kg3 Kd4 6. Qf6+ {/g4=}) (4... Qd5 5. Qxf2 $11) 5. Kg3 Qe3 $3 {pin} (5... Ke5 6. Qh5+ $1 Kd4 7. Qg4+ Kc3 (7... Kd3 8. Kg2 $11) 8. Qg7+ Qd4 9. Qc7+ Kd2 10. Kg2 e5 11. Qa5+ Ke3 12. Qa3+ $11) 6. Kh2 $3 {unpin A)} (6. Qxe3 $2 f1=N+ $1 7. Kf4 Nxe3 8. Kxe3 Ke5 $1 $19) 6... Qe5+ $1 ({B)} 6... Ke7 $1 7. Qb7+ (7. Qxe3 $2 f1=N+ $1 $19) 7... Kf6 8. Qf3+ (8. Qb2+ $2 Qe5+ $19) (8. Kg2 $2 Qe2 $19) 8... Qxf3 {model stalemate ? 2.} (8... Ke7 9. Qb7+ $11 { positional draw})) 7. Kg2 Qd5 {pin} 8. Kf1 {unpin} (8. Kxf2 $2 Qxf3+ 9. Kxf3 Kd5 $1 $19) 8... Qxf3 {model stalemate ? 1.} 1/2-1/2

[Event "hm. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2020.12.04"] [Round ""] [White "Jan Timman"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/K1k5/2B5/4r3/6p1/5P1p/5P1p/R7 w - - 0 1"] [PlyCount "21"] [EventDate "2020"] 
 1. Bb7 $1 (1. fxg4 $2 Kxc6 2. Rc1+ Rc5 3. Rh1 Ra5+ 4. Kb8 Rb5+ 5. Kc8 (5. Ka8 Rb2 6. Rxh2 Kc7 $19) 5... Rg5 ({or} 5... Rb4 $19)) 1... g3 ({Main-} 1... Ra5+ 2. Rxa5 h1=Q (2... g3 3. Rc5+ Kd6 4. Kb6 {transposes to the other main lines}) 3. Rc5+ Kd6 4. Rd5+ Ke6 5. Re5+ $1 Kf6 (5... Kxe5 6. f4+ $11) 6. Rf5+ $1 Kg6 7. Rg5+ $1 Kh6 8. Rh5+ $1 $11) 2. Rc1+ $1 (2. fxg3 $2 Ra5+ 3. Rxa5 h1=Q $19) 2... Rc5 $1 3. Rxc5+ Kd6 4. Kb6 $1 g2 ({Main-} 4... h1=Q 5. Rc6+ Kd7 6. Rc7+ Ke6 7. Rc6+ Kf5 (7... Ke5 $2 8. f4+ $1 $18) 8. Rc5+ Kf4 9. Rc4+ $11) 5. Rd5+ $1 (5. Rc6+ $2 Ke5 6. Rc5+ Kd4 $19) 5... Ke6 6. Kc7 $1 g1=Q 7. Rd6+ Ke7 8. Rd7+ Kf6 9. Rd6+ Kg5 10. Rd5+ Kh4 11. Rd4+ $11 {In the 3 main lines the White rook gives perpetual in 3 different ways: Horizontally on the 5th rank Vertcally on the c- and d-file.} 1/2-1/2

[Event "hm. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.04.30"] [Round ""] [White "Yuri Bazlov"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/3kP3/b1R5/1r1P4/N4K2/6n1/3B1P1p/8 w - - 0 1"] [PlyCount "25"] [EventDate "2023"] 
 1. Nc5+ $1 (1. Rh6 $2 h1=Q 2. Rxh1 Nxh1 3. Kf3 Bb7 4. Nc3 Rb2 5. Be3 Rc2 6. Bd4 $1 Nxf2 {white's chances of a draw are zero.}) (1. Kxg3 $2 h1=Q 2. Rxa6 Ke8 3. Nc3 Rb4 4. Ne2 Rb2 5. Ra8+ Kxe7 6. Bg5+ Kf7 7. Nf4 Qg1+ 8. Kh4 Qxf2+ 9. Kg4 Rb1 10. Rc8 Rg1+ 11. Kf5 Qb6 12. Ne6 Rf1+ 13. Bf4 Qb1+ 14. Ke5 Qb2+ 15. Kf5 Qf6+ 16. Kg4 Rg1+ 17. Kf3 Qh4 $19) 1... Rxc5 (1... Ke8 2. Rh6 h1=Q 3. Rxh1 Nxh1 4. Nxa6 $11) 2. Rd6+ $1 Ke8 $1 (2... Kxd6 3. e8=Q Rc4+ 4. Kxg3 h1=Q 5. Qd8+ Ke5 ( 5... Kc5 6. Qa5+ Bb5 7. Be3+ $11) 6. Bf4+ Ke4 7. Qe7+ Kd3 8. Qa3+ $11) 3. Rd8+ $1 Kxe7 {The rook and the king of black moved one row to the right - from the white to the black diagonal, which made it possible} 4. Rh8 $1 h1=Q 5. Rxh1 Nxh1 6. Bb4 $1 Kd6 7. Kf3 $1 ({thematic try:} 7. Ke4 $2 Nxf2+ 8. Kd4 Nd3 9. Ba3 Bb5 $19 {zz} (9... Bc4 $2 10. Bxc5+ Nxc5 11. Kxc4 $11 {zz}) 10. Bxc5+ Nxc5) 7... Bf1 $1 {Preventing the king from going to g2.} (7... Kxd5 8. Bxc5 Kxc5 9. Kg2 Bb7+ 10. f3 $1 $11) 8. Ke4 $1 Nxf2+ 9. Kd4 Nd3 10. Ba3 $1 {zz} Be2 11. Ke3 $1 Bf1 12. Kd4 Be2 13. Ke3 $11 { Positional draw with the perpetual mutual zugzvang} 1/2-1/2

[Event "c. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.02.25"] [Round ""] [White "Marc Gelly"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/2p2p2/2P2Kn1/1p4P1/1P5P/4P1P1/6kb/8 w - - 0 1"] [PlyCount "23"] [EventDate "2023"] 
 1. h5 $1 (1. Kxf7 $2 Ne5+ 2. Ke6 Bxg3 $19) 1... Nh8 $1 { Better is to lose the Knight in the corner. B. obtened tempo and position} ( 1... Bxg3 $2 2. hxg6 fxg6 3. e4 $1 Be1 4. Kxg6 Bxb4 5. e5 Be7 6. Kf5 $18) 2. Kg7 Kxg3 $1 (2... Bxg3 $2 3. Kxh8 $18) 3. Kxh8 Kg4 {/h4} 4. g6 $1 (4. h6 $2 Bd6 $1 $19) 4... Kxh5 $1 (4... fxg6 $2 5. hxg6 $18) 5. g7 $3 ({Thematiy try:} 5. gxf7 $2 Bd6 6. Kg7 Bxb4 7. Kf6 Bc5 $1 (7... Bc3+ $2 8. Ke6 $11) 8. e4 b4 9. e5 b3 10. e6 b2 11. e7 b1=Q 12. e8=Q Qg6+ 13. Ke5 Qd6+ 14. Kf5 Qd5+ 15. Kf4 Bd6+ $1 16. Ke3 Qc5+ $19 {Permutation Q/B} 17. Kd3 Bf8 $1 $19 { ! Blockade anti-battery and interception.B.wins.}) 5... Kh6 $1 (5... Be5 $2 6. Kh7 $18) 6. g8=N+ $1 Kg6 7. Ne7+ Kf6 8. Nc8 $3 $11 {And DRAW after f. ex.} (8. Nd5+ $2 Ke6 9. Nf4+ Ke5 10. Kg7 f5 11. Nh3 Ke4 $19 {THEME -The capture of the b-Knight in the corner requires very precise white counterplay (with underpromotion -Knight) to get a Draw}) 8... Bg1 9. Nd6 Bxe3 10. Ne8+ Ke7 11. Nxc7 Kd6 12. Nxb5+ $11 1/2-1/2

[Event "c. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.03.15"] [Round ""] [White "David Blundell"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/5p2/3p1P2/2k5/1p6/6K1/1PP5/8 w - - 0 1"] [PlyCount "21"] [EventDate "2023"] 
 1. Kg4 ({Try:} 1. Kf4 $2 Kd4 {zugzwang with WTM} 2. Kf5 Ke3 3. Kg5 (3. c3 b3 4. Kg5 Kd3 5. Kh6 Kc2 6. Kg7 Kxb2 7. Kxf7 Kxc3 8. Ke7 b2 9. f7 b1=Q 10. f8=Q Qe4+ $19) 3... Ke4 4. Kh6 Kf5 5. Kg7 Ke6 6. c3 bxc3 {(6...d5 also wins)} 7. bxc3 d5 $19 {zugzwang}) ({Try:} 1. Kf3 $2 Kd5 2. Ke3 Ke5 3. Kd3 Kxf6 (3... d5 $2 4. Ke3 Kxf6 5. Kd4 Ke6 6. Kc5 Ke5 7. Kxb4 Kd4 8. b3 (8. c3+ $2 Ke3 9. Kc5 f5 10. b4 f4 11. b5 f3 12. b6 f2 13. b7 f1=Q 14. b8=Q Qc4+ 15. Kd6 Qf4+) 8... f5 9. c4 { draws, e.g.} f4 10. cxd5 Kxd5 11. Kc3 Ke4 12. Kd2 Kf3 13. b4 Kg2 14. b5 {etc.}) 4. Kc4 Ke5 5. Kxb4 Kd4 6. Ka5 f5 7. b4 f4 8. b5 Kc5 (8... Kd5 $2 9. c4+ { blocks the a6-f1 diagonal}) 9. b6 Kc6 10. Ka6 f3 11. b7 f2 12. b8=Q f1=Q+ 13. Ka7 Qa1#) 1... Kd5 2. Kf5 Kd4 3. Kf4 {zugzwang with BTM} d5 4. c3+ ({Try:} 4. Kf3 $2 b3 (4... Ke5 $2 5. Ke3 Kxf6 6. Kd4 {White draws as given above.}) 5. cxb3 Ke5 6. b4 Kxf6 7. b5 Ke6 8. b6 Kd6 9. Kf4 f6 10. Ke3 f5 $19) ({Try:} 4. Kf5 $2 b3 (4... Ke3 $2 5. Ke5 b3 6. c3 Kd3 7. Kxd5 Kc2 8. c4 Kxb2 9. c5 Ka3 10. c6 b2 11. c7 b1=Q 12. c8=Q $11) 5. cxb3 Ke3 6. b4 (6. Ke5 d4 7. Kd6 d3 8. Ke7 d2 9. Kxf7 d1=Q 10. Ke7 Qxb3 11. f7 { Black wins because the b pawn ensures that White has no stalemate.}) 6... d4 7. b5 d3 8. b6 d2 9. b7 d1=Q 10. b8=Q Qh5#) 4... bxc3 5. bxc3+ Kxc3 6. Ke5 d4 7. Kd6 d3 8. Ke7 d2 9. Kxf7 d1=Q 10. Ke7 Qe1+ {/e2} 11. Kf8 { and Black cannot prevent 12.f7.} 1/2-1/2

[Event "c. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.01"] [Round ""] [White "Michael Pasman"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/4k2P/R4N2/8/8/n6r/bK1p4/8 w - - 0 1"] [PlyCount "33"] [EventDate "2023"] 
 1. Ng8+ $1 (1. Rxa3 $2 d1=Q (1... Bb3 $11) 2. Rxh3 Qe2+ 3. Ka3 Qa6+ 4. Kb2 Qb7+ 5. Ka3 Qa8+ 6. Kb4 (6. Kb2) 6... Qh8 $19) 1... Kf7 2. Ra7+ Ke6 (2... Kf8 3. Rxa3 Bb3 4. Rxb3 Rxb3+ 5. Kc2 Rh3 {The knight goes out through f6 Position X1}) 3. Ra6+ ({Logical try :} 3. Rxa3 Bb3 $1 (3... d1=Q $2 4. Rxh3 Qe2+ 5. Ka3 $11) 4. Rxb3 Rxb3+ 5. Kc2 $19 {The knight is trapped} Rh3 {Position X2}) 3... Kf5 ( 3... Ke5 4. Nh6 $1 Rxh6 5. Rxh6 d1=Q 6. h8=Q+ {promoting with check}) (3... Kd5 4. Rxa3 d1=Q (4... Bb3 5. Nf6+ $11) 5. Rxh3 $11) 4. Ra5+ (4. Nh6+ $2 Rxh6 $19) ({Logical try :} 4. Rxa3 Bb3 $3 5. Rxb3 Rxb3+ 6. Kc2 Rh3 { Position X3,The knight is trapped} 7. Ne7+ Ke4 $1 $19) 4... Bd5 $1 ({or} 4... Kg6 5. Rxa3 Bb3 6. Rxb3 Rxb3+ 7. Kc2 Rh3 {Position X4} 8. Ne7+ $13 { The knight goes out}) (4... Ke6 5. Ra6+ $11) ({or} 4... Kf4 5. Rxa3 $1 Bb3 $1 6. Rxb3 Rxb3+ 7. Kc2 $1 Rh3 {Position X5} 8. Kxd2 $1 Rxh7 9. Nf6 $1 $11 { The knight goes out}) 5. Rxd5+ Ke6 $1 6. Rd4 $1 (6. Rd8 $2 Nc4+ 7. Kc2 Rxh7 $19 ) 6... Rxh7 (6... Nc4+ 7. Kc2 $11) 7. Nf6 $1 (7. Kxa3 $2 Rd7 $19) (7. Rxd2 $2 Nc4+ $19) 7... Nc4+ $1 (7... Kxf6 8. Kxa3 $11) 8. Kc2 Rh1 $1 9. Ne4 d1=Q+ $1 ( 9... Rc1+ 10. Kb3 Na5+ 11. Ka4 Ra1+ (11... Rc4+ 12. Rxc4 d1=Q+ 13. Kxa5 $11) 12. Kb5 $11) (9... Ke5 10. Rxd2 $11) 10. Rxd1 Ne3+ 11. Kd2 Nxd1 12. Ng3 $1 Rh3 13. Ne2 Rh1 14. Ng3 Rg1 15. Ne2 Rf1 16. Ng3 Rf3 17. Ne2 $1 $11 1/2-1/2

[Event "c. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023.09.09"] [Round ""] [White "Peter Krug & Mario Garcia"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "5n1k/N3R2r/4pPQ1/6K1/4R3/4p3/1r1q3B/8 w - - 0 1"] [PlyCount "16"] [EventDate "2021"] [TimeControl "300"] 
 1. Be5 $1 (1. Qg7+ $2 Rxg7+ 2. fxg7+ Kg8 3. gxf8=Q+ Kxf8 4. R7xe6 Qd5+ $1 (4... Qd8+ $5 5. Rf6+ Kg8 6. Bg3 Rb7 7. Rxe3 Rxa7 8. Ref3 $11) 5. R4e5 Rg2+ $19) (1. Bg3 $2 e2+ 2. Kg4 Rh4+ $1 3. Bxh4 Nxg6 $19) 1... e2+ (1... Qg2+ $4 2. Rg4 $18) 2. Rf4 $1 (2. Kg4 $2 Rh4+ 3. Kxh4 Nxg6+ $19) 2... Qxf4+ 3. Kxf4 (3. Bxf4 $2 e1=Q $19) 3... Nxg6+ 4. Kg5 Rb8 (4... Rxe7 5. fxe7+ Nxe5 6. e8=Q+ Kg7 7. Qxe6 e1=Q 8. Qf6+ Kh7 9. Qe7+ Kg8 10. Qd8+ Kf7 11. Qf6+ Ke8 12. Qe6+ $11 { perpetual checks}) (4... Rh5+ 5. Kxg6 $11) (4... Nxe7 5. fxe7+ Rg7+ 6. Bxg7+ Kxg7 7. e8=Q e1=Q 8. Qg6+ $11) 5. Nc8 $1 ({Try:} 5. f7+ $2 Nxe5 6. Re8+ Rxe8 7. fxe8=Q+ Kg7 8. Qxe6 e1=Q 9. Qf6+ Kg8 10. Qd8+ Kf7 11. Qf6+ (11. Qc7+ Ke6 12. Qb6+ Kd5 13. Qb3+ Ke4 $19) 11... Ke8 12. Qe6+ Kf8 13. Qd6+ Re7 $19) 5... Rxc8 ( 5... Rxe7 6. fxe7+ (6. Kxg6 $2 Rf7 $1 7. Kxf7 Rxc8 $19) 6... Nxe5 7. e8=Q+ Kg7 8. Qxe6 e1=Q 9. Qf6+ $11 {perpetual checks}) 6. Re8+ Rxe8 7. f7+ Nxe5 8. f8=Q+ Rxf8 {stalemate} 1/2-1/2 
 [pgn autoplayMode=none][Event "c. UAPA 20th sec.B.2.draw"] [Site ""] [Date "2023"] [Round ""] [White "Eduard Eilazyan"] [Black "Dedicated to Natalia Zhukova"] [Result "1/2-1/2"] [SetUp "1"] [FEN "3k4/4b3/p7/3P3r/R1P2n2/1p4p1/8/4BKR1 w - - 0 1"] [PlyCount "24"] [EventDate "2023"] 
 1. d6 $1 (1. Rxa6 $2 b2 2. Ba5+ Kd7 3. Rb6 g2+ 4. Rxg2 Rh1+ 5. Kf2 Bc5+ 6. Kf3 Rf1+ 7. Ke4 Bxb6 8. Rxb2 Bxa5 $19) (1. Bb4 $2 Bf6 2. Rxg3 Rh1+ 3. Kf2 b2 4. Ba5+ Kd7 5. Rb4 b1=Q 6. Rxb1 Rxb1 7. Ke3 Nxd5+ 8. cxd5 Rb3+ 9. Kf4 Be5+ 10. Kxe5 Rxg3 $19) (1. Ra1 $2 Bc5 2. Bxg3 Bxg1 3. Kxg1 Ne2+ 4. Kg2 Nc3 5. Be1 b2 6. Bxc3 bxa1=Q 7. Bxa1 Rf5 $19) 1... Bxd6 2. Rxa6 $1 (2. Ra1 $2 b2 3. Rb1 Bc5 4. Rxb2 Bxg1 5. Bxg3 Be3 6. Bxf4 Bxf4 $19) 2... g2+ $1 (2... Bc5 3. Bxg3 b2 4. Ra8+ Kd7 5. Rb8 Bxg1 6. Rxb2 Be3 7. Bxf4 $11) 3. Rxg2 Rh1+ (3... Nxg2 4. Rxd6+ Kc7 5. Bg3 Ne3+ 6. Ke2 Nf5 7. Rd3+ Nxg3+ 8. Rxg3 b2 9. Rg1 $11) (3... Bc5 4. Ra8+ $1 Kd7 5. Rg7+ Kd6 6. Rd8+ Ke5 7. Re8+ Kf5 8. Rf7+ Kg4 9. Rg7+ Kf5 $11) 4. Rg1 (4. Kf2 $2 Bc5+ $1 5. Kg3 Nxg2 $19) 4... Rxg1+ 5. Kxg1 Bc5+ (5... b2 6. Rxd6+ $1 Kc7 7. Rd1 $1 $11) 6. Kf1 b2 7. Ra8+ $3 {Foresight effect!} (7. Ra1 $2 bxa1=N $19 {Even the exchange of bishops does not save the White:} ({or} 7... bxa1=B 8. Bc3 Bd4 $1 $19) 8. Bf2 Nd3 9. Bxc5 Nxc5 { (The white pawn is stopped on the Troitsky line!)}) 7... Kc7 $1 8. Ra1 $1 bxa1=N (8... bxa1=B 9. Bg3 $1 Be5 10. Bxf4 Bxf4 $11 { Black has two extra but useless Bishops;}) (8... bxa1=Q {stalemate}) (8... bxa1=R {stalemate}) 9. Bc3 $1 Nb3 10. Be5+ Bd6 11. Bxd6+ Kxd6 12. c5+ $1 Kc6 $11 {Black has two extra but useless Knights, because the white pawn crossed the Troitsky line!} 1/2-1/2