www.arves.org - Uralskij Problemist-30-AT 2023

Studies awarded for the 30th annivesary of the Uralskij Problemist.

[Event "1.p Uralskij Problemist - 30 JT"] [Site ""] [Date "2023"] [Round ""] [White "A. Zhukov & S. Osintsev"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "8/5q2/1N4R1/8/4P3/K2k3B/5PRp/b7 w - - 0 1"] [PlyCount "33"] [EventDate "2023"] 
 1. Rd6+ (1. R6g3+ $2 Kc2 $1 2. Rxh2 (2. f4+ Kb1 3. Rxh2 Qa7+ $1 4. Na4 Qe7+ $1 $11) 2... Qa7+ 3. Na4 Bb2+ $1 4. Kb4 Qb7+ $1 (4... Qb8+ $2 5. Kc4 $1 $18) 5. Kc5 Qe7+ $1 6. Kb5 (6. Kb6 Qb4+ 7. Kc7 Be5+ $11) 6... Qe8+ $1 7. Ka5 Qa8+ $1 8. Kb5 Qe8+ $11 {perpetual check}) 1... Kxe4 (1... Bd4 2. Rxh2 Qf4 3. Bf1+ Kxe4 4. Re6+ Kf3 5. Be2#) 2. Rxh2 Qf3+ $1 (2... Be5 3. Bg2+ Kf5 4. Rd5 Qa7+ 5. Na4 $18) (2... Qf8 3. Bg2+ $1 (3. Nc4 $2 Be5 4. Bg2+ Kf4 $1 5. Rh4+ Kg5 6. Rhh6 Bxd6+ 7. Rxd6 Qxf2 $11) 3... Kf4 (3... Kf5 4. Nc4 Be5 5. Rh5+ $18) 4. Nd5+ $1 (4. Rhh6 $2 Be5 5. Nd5+ Kf5 $1 6. Bh3+ Ke4 $1 7. Bg2+ Kf5 $11 {positional draw}) 4... Kf5 5. Rh5+ Kg4 6. Rhh6 Be5 7. Nf6+ $1 { thematic position A2 - Knight between Rooks} Kf4 8. Rh4+ $1 Kg5 9. f4+ $1 Kxh4 10. fxe5 Qe7 11. Nd7 $18) 3. Ka2 $1 (3. Kb4 $2 {thematic try} Be5 $1 (3... Qf4 $2 4. Rh6 $3 {thematic position A1 - Bishop between Rooks} Ke5+ (4... Qxh2 5. Bf5+ $18) (4... Qxh6) 5. Nc4+ $18 {Position B}) 4. Bg2 Bxd6+ 5. Kc4 Bxh2 6. Bxf3+ Kxf3 $11) (3. Ka4 $2 {thematic try} Qf4 4. Rh6 $1 Ke5+ $1 5. Nc4+ { Position B1} Qxc4+ 6. Ka5 $11) 3... Qe2+ (3... Be5 4. Bg2 $18) 4. Kxa1 Qe1+ $1 5. Ka2 $1 (5. Kb2 $2 Qb4+ 6. Kc2 Qxd6 7. Bg2+ Kf5 $11) 5... Qa5+ 6. Kb3 $1 Qb5+ 7. Kc2 $1 (7. Kc3 $2 Qe5+ 8. Kc4 Qxd6 9. Bg2+ Kf5 $11) 7... Qc5+ 8. Nc4 $1 { thematic sacrifice of the Knight on the b-vertically} Qxc4+ 9. Kd1 Qb3+ 10. Ke1 ({loss of time} 10. Ke2 Qb5+ 11. Ke1 Qa5+ 12. Kf1 Qa1+) 10... Qc3+ 11. Kf1 Qa1+ ({or} 11... Qc1+ 12. Kg2 Qg5+ 13. Bg4) 12. Kg2 Qg7+ 13. Bg4 $1 { thematic sacrifice of the Bishop on the g-vertical} Qxg4+ 14. Kf1 Qf4 15. Rd2 $3 {thematic position A - pawn between Rooks} (15. Rdh6 $2 Qc1+ 16. Kg2 Qg5+ 17. Kh1 Qc1+ $11 {perpetual check}) 15... Kf5 $1 (15... Qxd2 16. f3+ $18) ( 15... Qxh2 16. f3+ $18) (15... Kf3 16. Rh3+ $18 (16. Rd3+)) 16. Rh5+ $1 (16. Rd5+ $2 Ke6 17. Rhh5 Qc4+ $1 18. Kg2 Qg4+ 19. Kh2 Qf4+ 20. Kg1 Qg4+ 21. Kf1 Qc4+ $11 {perpetual check}) 16... Kg6 17. Rhd5 $18 {Black Bishop is active in variations and Queen counterattacks with chances for perpetual check. But White, after two understandable sacrifices, creates a paradoxical sacrifice: both Rooks are suddenly under attack. Indirect defense brings victory!} 1-0

[Event "sp.p Uralskij Problemist - 30 JT"] [Site ""] [Date "2023"] [Round ""] [White "V. Zheltukhov & S. Osintsev"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "7R/b2B3P/4N2n/8/1q6/8/P1P5/R1K1k3 w - - 0 1"] [PlyCount "53"] [EventDate "2022"] 
 1. Nc5 $1 Qa3+ (1... Bxc5 $2 2. Re8+ $18) 2. Kb1 Bxc5 3. Re8+ Kd2 4. Re2+ $1 Kxe2 5. h8=Q Qb4+ 6. Qb2 (6. Kc1 $2 Be3#) 6... Qe1+ $1 7. Qc1 Qxc1+ 8. Kxc1 Ba3+ 9. Kb1 Kd2 {White has a material advantage, but is fighting for a draw; only the bishop moves.} ({or} 9... Nf7 10. c4 Kd2 11. Be6) 10. c4 $1 ({After}  10. Be6 $2 Kc3 $1 $19 {White is forced to release Black's Knight.}) 10... Nf7 11. Be6 (11. Bc6 $2 Ne5 $1 12. c5 Nd3 $1 (12... Nxc6 $2 $11 {stalemate}) 13. Bd5 Nxc5 $19) 11... Nd6 $1 (11... Ng5 12. Bd5 Nh3 13. c5 $1 Nf4 14. Bc4 $11) ( 11... Ne5 12. c5 Nf3 13. Bd5 $11 {to the main line A)}) 12. Bd5 (12. c5 $2 Ne4 {threat} 13. Bf5 Nc3#) 12... Kd1 13. Bf3+ Kd2 14. Bd5 Nf5 {The Black Knight can checkmate on c3 from squares a4, e4, e2, d1 with the King on d2, or checkmate on d2 from squares c4, e4, f3, f1 with the King on c3. The Black King can go to d1, but the Bishop will give check and return it back. White's solution is paradoxical: 15.c5! giving the Knight two more squares b5 and d5 on the way tocheckmate!} 15. c5 $3 {main line A)} (15. Bf3 $2 Nd4 $1 16. Bg4 Kc3 $1 17. Bh5 Ne6 $1 18. Be8 Nc5 19. Bc6 Kd2 $19) 15... Nd4 ({main line B)}  15... Ne3 {The Knight makes moves on other squares, unlike line A)} 16. Bf3 ( 16. Bb3 $2 Kc3 17. c6 {threat} Nf1 18. c7 Nd2#) 16... Nc4 { Position B1 - The Bishop and the Knight exchanged squares!} 17. Bd5 $1 { The Bishop immediately attacks the Knight!} (17. Be2 $6 Nb2 $3 18. c6 Na4 { threat} 19. c7 Nc3#) 17... Ne3 (17... Nb2 18. Bb3 Nd3 19. c6 $1 $11) 18. Bf3 Kc3 19. Be2 (19. Bg2 $6 Nc4 {threat} 20. c6 Nd2#) 19... Nd5 { Position C1 - The Bishop and the Knight exchanged squares!} 20. Bf3 $1 { The Bishop immediately attacks the Knight! Position A1 - The Bishop and the Knight exchangedsquares!} (20. c6 $2 Kd2 $1 {threat} 21. Bf3 Nc3#) 20... Ne3 ( 20... Nf4 21. c6 (21. Be4 $2 Kd2 $1 22. Bf3 Ne6 23. c6 Nc7 24. Be2 $5 Nd5 25. Bc4 Nc3#) 21... Ne6 $11) 21. Be2 Kd2 22. Bf3 (22. c6 $2 Nd5 {threat} 23. c7 Nc3#) 22... Nc4 23. Bd5 (23. c6 $2 Kc3 {threat} 24. c7 Nd2#) 23... Ne3 24. Bf3 Kc3 25. Be2 $11 { positional draw. Position D1 - final. Fight for the corresponding squares}) 16. Bc4 {the Bishop will move to the square vacated by the pawn} Nf3 17. Bd5 $1 { Position A} (17. Be2 $2 Ng5 $3 18. c6 Ne4 {threat} 19. c7 Nc3#) 17... Ng1 18. Bc4 (18. c6 $2 Ne2 {threat} 19. c7 Nc3#) 18... Nf3 {Position B} 19. Bd5 { The Bishop immediately attacks the Knight!} (19. c6 $2 Kc3 {threat} 20. c7 Nd2# ) 19... Nd4 20. Bc4 Kc3 21. Bd5 (21. Bf1 $2 Nf3 {threat} 22. c6 Nd2#) 21... Nb5 22. Bc4 $1 (22. Bc6 $2 Nc7 $1 23. Bf3 Kd2 24. c6 Nb5 25. Be2 Nc3#) (22. Bf3 $2 Kd2 {threat} 23. Be2 Nc3#) 22... Nd4 23. Bd5 Ne2 {Position C} 24. Bf3 $1 { The Bishop immediately attacks the Knight!} (24. Bc4 $6 Ng3 $3 25. Bd5 Nf1 26. c6 Nd2#) 24... Ng3 25. Bg2 (25. c6 $2 Nf1 {threat} 26. c7 Nd2#) 25... Kd2 26. Bf3 (26. c6 $2 Ne2 {threat} 27. c7 Nc3#) 26... Kc3 27. Bg2 $11 {positionaldraw. Position D - final. 12-piece starting position without attacks! After a fun intro, white King and Rook are locked in the corner. Checkmate threatens, but a positional draw is still achieved by precise moves in the Bishop-Knight duel in the fight for the corresponding squares.} 1/2-1/2

[Event "1.hm Uralskij Problemist - 30 JT"] [Site ""] [Date "2023"] [Round ""] [White "P. Arestov & M. Hlinka"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/1K6/2N5/B6p/2n1p2p/5B2/5k2/8 w - - 0 1"] [PlyCount "27"] [EventDate "2023"] 
 1. Bh1 $1 (1. Bxe4 $2 Nd6+ 2. Kb8 Nxe4 $19 {(bKf2)}) (1. Bxh5 $2 Nxa5+ 2. Nxa5 h3 3. Bg6 e3 $19) 1... Kg1 $1 (1... Nxa5+ 2. Nxa5 e3 3. Nc4 e2 4. Ne5 e1=Q 5. Nd3+ Kg1 6. Nxe1 Kxh1 7. Kc6 $1 h3 8. Kd5 $11) 2. Bxe4 Nd6+ 3. Ka6 $1 (3. Kb6 $2 {or Kc7? or Kb8?} Nxe4 4. Nd4 h3 $19) 3... Nxe4 {(bKg1)} 4. Nd4 $1 (4. Bc7 $2 Kf2 5. Ne7 Ng3 $19) (4. Ne7 $2 h3 5. Bc7 Ng5 $19) 4... h3 (4... Kg2 5. Bc7 { /Ne6} h3 6. Ne6 {as main}) 5. Bc7 Kg2 (5... Kf2 6. Nf5 $11) 6. Ne6 $1 (6. Nf5 $2 h2 7. Bxh2 Kxh2 $19) 6... Kf2 $1 (6... h2 7. Bxh2 Kxh2 8. Nf4 $1 h4 9. Ng6 h3 10. Nf4 $11) 7. Bh2 $1 (7. Nf4 $2 h2 8. Nh3+ Kg2 9. Bxh2 Kxh3 $1 $19) 7... Kg2 8. Bc7 $1 ({try} 8. Be5 $2 Kf3 $1 9. Kb5 h4 $1 10. Kc4 Kf2 11. Kd3 Ng3 12. Bd4+ Kf1 $19) 8... Kf3 9. Nd4+ $1 ({try} 9. Kb5 $2 h4 10. Kc4 Kf2 $1 11. Nf4 h2 12. Nd3+ Kg1 13. Bxh2+ Kxh2 14. Kd4 Nd6 $1 15. Nf4 Kg3 $19 {for example} 16. Ke3 Nf5+ 17. Ke4 Ne7 18. Ke3 Ng6 $1 $19) 9... Kg4 $1 (9... Kf2 10. Nf5 $11) ( 9... Kg2 10. Ne6 {positional draw}) 10. Nc6 $1 ({try} 10. Ne2 $2 Nd2 $1 11. Ng1 Nf3 12. Nxh3 Kxh3 13. Bd8 Kg4 14. Kb5 Ng5 15. Kc4 h4 $19 {for example} 16. Kd3 Kf3 17. Bc7 h3 18. Bh2 Ne4 $19) 10... Ng3 (10... Nc5+ 11. Kb5 Ne6 12. Bb8 {/d6} Nf4 13. Ne5+ Kg3 14. Ng6 $11 {/d3}) 11. Ne5+ Kf4 (11... Kf5 12. Nf3 $11) (11... Kh4 $4 12. Bd8#) 12. Nf7+ $1 Kg4 13. Ne5+ Kf4 14. Nf7+ $1 {positional draw, or 14...Kf3 15. Ng5+ Kg2 16.Nxh3=. Unusual rescue by an perpetual check in the centre of a board at externally not dangerous passed pawns. Instructive theoretical end of game in demonstrative variants of turning out babies.} 1/2-1/2

[Event "2.hm Uralskij Problemist - 30 JT"] [Site ""] [Date "2023"] [Round ""] [White "P. Arestov"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "R7/1P6/5n2/1n3K2/p7/1P6/5k1p/8 w - - 0 1"] [PlyCount "23"] [EventDate "2023"] 
 1. Rh8 $1 (1. b8=Q $2 h1=Q 2. Qf4+ Qf3 3. Qxf3+ Kxf3 4. bxa4 Nc7 $1 5. Rd8 $1 Nfe8 $1 6. a5 Ke3 7. Ke5 Ke2 $1 8. Ke4 Nf6+ 9. Ke5 Nfe8 $1 {positional draw}) 1... Nd7 (1... Nd6+ 2. Kxf6 Nxb7 3. Rxh2+ Kg3 4. Rh7 $18 {Rb2}) 2. Rxh2+ Ke3 $1 (2... Kg3 {Kf3} 3. Rd2 Nb8 4. bxa4 $18) 3. Rh3+ $1 (3. Rh7 $2 Nd6+ 4. Ke6 Nxb7 5. Rxd7 Nc5+ $11) 3... Kd2 $1 (3... Kd4 4. bxa4 Nd6+ 5. Ke6 Nxb7 6. Kxd7 Nc5+ 7. Kc6 Nxa4 8. Rh4+ $18) 4. Rh7 Nd6+ (4... Nb8 5. bxa4 Nd4+ 6. Ke5 $18) 5. Kf4 $1 (5. Ke6 $2 Nxb7 6. Rxd7+ Kc3 7. bxa4 Nc5+ $11) 5... Nxb7 6. Rxd7+ Kc3 7. b4 $3 ({TRY:} 7. Rc7+ Nc5 $1 8. Rxc5+ Kb4 $1 9. Rc8 axb3 $1 10. Ke3 b2 11. Kd2 b1=N+ $1 12. Kc2 Na3+ $11) 7... Kxb4 (7... a3 8. Rxb7 a2 9. Ra7 $18) 8. Rxb7+ Kc3 9. Ra7 Kb3 10. Ke3 a3 11. Kd2 a2 (11... Kb2 12. Rb7+ $18) 12. Kc1 { win. Instead of immediate increase of quantity of figures with unexpected drawn game in the ratio Rp-NN, worthy embodiments in a separate study, solves consecutive struggle against 2 passed pawns on different flanks.} 1-0

[Event "sp.hm Uralskij Problemist - 30 JT"] [Site "Композиция"] [Date "2023"] [Round ""] [White "P. Arestov"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "4qN2/4P1k1/7p/5P2/8/5K2/8/1B6 w - - 0 1"] [PlyCount "31"] [EventDate "2023"] [TimeControl "300"] 
 1. Nh7 $3 Kxh7 (1... Qh5+ 2. Ke3 $1 Kxh7 3. f6+ Kg8 4. Ba2+ $11) 2. f6+ Kg8 3. Ba2+ Kh7 $1 4. Bb1+ Kh8 5. Ke3 $3 (5. Kf4 $2 Qb8+ 6. Kg4 Qe5 $19) (5. Kg4 $2 Qb5 $1 6. Bg6 Qg5+ $19) (5. Ke4 $2 Kg8 $1 6. Ba2+ Kh7 $1 7. Ke5 Kg6 8. Bb1+ Kg5 $19) (5. Bd3 $2 h5 6. Kf4 h4 7. Kg4 h3 $1 8. Kxh3 Qh5+ 9. Kg3 Kg8 10. Bc4+ Kh7 11. Kf4 Qe8 $1 12. Kf5 Qd7+ 13. Ke5 Kg6 14. Bd3+ Kg5 $19) 5... h5 6. Kf4 $1 Qb8+ (6... h4 7. Ke5 h3 8. Ke6 h2 9. f7 Qc6+ 10. Ke5 Qc5+ 11. Ke6 { positional draw}) (6... Kg8 7. Kg5 Qb5+ 8. Kh6 $1 Kf7 9. Bg6+ Kxf6 10. e8=Q $11 ) 7. Kg5 Qe5+ 8. Kg6 h4 9. Kf7 Qd5+ 10. Kg6 $1 (10. Kf8 $2 Qg8#) (10. Ke8 $2 Qe6 11. f7 Qc8#) 10... Qg8+ (10... Qe6 11. Bf5 $11) (10... Qe5 11. Kf7 { positional draw}) 11. Kf5 $1 h3 12. Ba2 $1 Qc8+ 13. Ke5 $1 (13. Be6 $2 Qe8 $1 14. f7 Qxe7 $19) 13... Qc7+ 14. Ke6 Qc6+ 15. Ke5 $1 (15. Kf7 $2 h2 16. e8=Q+ Qxe8+ 17. Kxe8 h1=Q $19) 15... Qc7+ 16. Ke6 {positional draw. Technical demonstration of reliability of a white bastion against attacks of a queen.} 1/2-1/2