www.arves.org - Problem Forum 2011-2012

Studies awarded in the Magazine tournament Problem Forum 2011-2012.

[Event "2.p Problem-Forum"] [Site ""] [Date "2012.12"] [Round ""] [White "Becker=R"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "k7/3K3Q/2p5/1N6/8/8/8/2q5 w - - 0 1"] [PlyCount "49"] [EventDate "2012"] 
 1. Nc7+ $1 ({Try} 1. Qg8+ $2 Kb7 2. Nd6+ Kb6 3. Qb3+ Kc5 4. Qa4 Qh1 $1 {=}) ({ Try} 1. Nd6 $2 Qb2 $1 2. Kc7 Ka7 3. Kxc6+ Ka6 4. Qd3+ Ka7 5. Nb5+ Ka6 {=}) 1... Ka7 2. Qd3 $1 Qa1 (2... Kb6 3. Qa6+ Kc5 4. Qxc6+ {+-}) 3. Qe3+ Kb7 4. Qb3+ Ka7 5. Ne8 $1 Qa6 (5... Ka6 6. Qc4+ Ka5 7. Qc5+ {+-}) 6. Nd6 Ka8 (6... c5 7. Nc8+ Ka8 8. Kc7 {+-}) 7. Qg8+ $1 ({Thematic try} 7. Kc7 $2 Qa7+ 8. Kc8 Qa6+ 9. Nb7 Qa1 $1 10. Nd8 Qa6+ 11. Nb7 Qa1 12. Nc5 Qh8+ {=}) (7. Qf3 $2 Ka7 8. Qf7 Ka8 9. Qg8+ {(Qf8+)} Ka7 10. Qg7 {loss of time}) 7... Ka7 8. Qg7 Ka8 (8... Qa4 9. Kc7 Ka6 10. Qb2 Qa5+ 11. Kc8 Qd5 (11... Qg5 12. Qa2+ Kb6 13. Nc4+ {+-}) (11... Qc5 12. Qa2+ Kb6 13. Qb3+ Ka6 14. Qa4+ Kb6 15. Nc4+ {+-}) 12. Qa3+ Kb6 (12... Qa5 13. Qd3+ Ka7 14. Qh7+ {+-}) 13. Qb4+ Ka6 14. Kb8 $1 Qg8+ 15. Nc8 Qg3+ 16. Ka8 { +-}) (8... c5 9. Kc7 Qb6+ 10. Kc8+ Ka6 11. Qa1+ Qa5 12. Qf1+ {(Qh1) +-}) 9. Qh8+ {(Qg2)} Ka7 10. Qb2 $1 Ka8 11. Kc7 Qa5+ $1 12. Kc8 Qa7 13. Qg2 $1 (13. Qb4 $2 Qa6+ 14. Kc7 Qa7+ 15. Kxc6 Qa6+ 16. Kd7 Qa7+ {=}) (13. Qb1 $2 Qa6+ 14. Nb7 c5 $1 15. Kc7 Qa7 16. Qh1 Qb8+ 17. Kb6 Qa7+ {=}) 13... Qb8+ (13... Qa6+ 14. Kc7 Qa7+ 15. Kxc6 {+-}) 14. Kd7 Qb3 (14... Qb1 15. Kc7 Ka7 16. Nb5+ {(Nc8+) +-}) 15. Kc7 Qd5 16. Qe2 $1 (16. Qb2 $2 Qa5+ 17. Kc8 Qa7 {loss of time}) 16... Qa5+ 17. Kc8 Qb6 (17... Qa1 18. Ne8 $1 Qa3 (18... Ka7 19. Qe3+ {(Qe7+) +-}) 19. Nc7+ Ka7 20. Qf2+ c5 21. Nb5+ {(Qg2) +-}) (17... Qa3 18. Qe4 Qa6+ 19. Kc7 Qa7+ 20. Kxc6 {+-}) 18. Qa2+ (18. Qf3 $2 Ka7 19. Qf7+ (19. Qc3 Qa6+ 20. Kc7 Qb6+ 21. Kd7 Qa6 22. Qb2 Ka8 {loss of time}) 19... Ka8 20. Qa2+ {loss of time}) 18... Qa7 19. Qb2 $1 Qa6+ 20. Nb7 Qa7 (20... c5 {(Ka7)} 21. Kc7 {+-}) 21. Nc5 Qb6 22. Qa3+ {(Qa2+)} Qa7 23. Qb3 {(Qb4)} Qb6 24. Qa4+ Qa7 25. Qxc6+ {+-} 1-0

[Event "1.hm Problem-Forum"] [Site ""] [Date "2011.09"] [Round ""] [White "Becker=R"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/k1q5/P7/P1b5/P7/7B/7p/5K1Q w - - 0 1"] [PlyCount "14"] [EventDate "2011"] 
 1. Bf5 $1 (1. Qf3 $2 {(Qe4?)} h1=Q+ 2. Qxh1 Qf4+ 3. Ke2 Qe3+ 4. Kd1 Qd3+ {-+}) (1. Ke2 $2 Qe5+ 2. Kd3 Qd4+ 3. Kc2 Qc4+ 4. Kd2 Bb4+ 5. Ke3 Qc5+ 6. Kf4 (6. Kd3 Qc3+ 7. Ke2 Qd2+ 8. Kf1 Qe1+ 9. Kg2 Qe4+ 10. Kxh2 Bd6+ 11. Kg1 Qe1+ {etc.}) 6... Bd2+ 7. Kg3 Qe5+ 8. Kf2 Qe3+ 9. Kf1 Qe1+ 10. Kg2 Qe4+ 11. Kxh2 Bf4+ 12. Kg1 Qe1+ 13. Kg2 Qe2+ 14. Kg1 Be3#) (1. Be6 $2 Qf4+ 2. Kg2 Bg1 3. Bd5 (3. Kh3 Qe3+ 4. Kh4 Bf2+ 5. Kh5 Qe5+ {-+}) 3... Qg4+ 4. Kf1 Qd1+ {-+}) (1. Bg4 $2 Qf4+ 2. Bf3 Qd2 3. Be2 Qc1+ 4. Kg2 Qg1+ {-+}) 1... Qf4+ 2. Kg2 Bg1 (2... Qg5+ 3. Kh3 {=}) (2... Bd6 3. Qd1 $1 Qg3+ 4. Kh1 {=}) 3. Bg6 $1 (3. Bc2 $2 Qg4+ $1 (3... Kxa6 $2 4. Kh3 Qf1+ 5. Kg4 Qe2+ 6. Kh3 {(Kh4)} Qxc2 7. Qa8+ Ba7 8. Kg3 Qe2 9. Qc8+ Kxa5 10. Qf5+ Kb4 11. Qb1+ Kc3 12. Qc1+ Kd4 13. Qa1+ Kd5 14. Qh1+ $1 {=}) 4. Kf1 Qh3+ 5. Ke2 Qe3+ 6. Kd1 Qd4+ 7. Ke2 (7. Kc1 Be3+ 8. Kb1 Qb4+ 9. Ka2 Bd4 {-+}) 7... Qf2+ 8. Kd3 Qf1+ 9. Ke4 Qxa6 $1 10. Ke5 (10. Kf5 Qc8+ {-+}) 10... Qxa5+ 11. Ke6 Qb6+ {-+}) 3... Qg4+ (3... Kxa6 4. Bh5 $1 (4. Kh3 $2 Qh6+ {-+}) 4... Qg5+ 5. Kf1 Qxh5 6. Qa8+ Ba7 7. Qc6+ {(Qc8+)} Kxa5 8. Qc3+ {=}) 4. Kf1 Qd1+ 5. Kg2 Qd5+ 6. Kf1 Qxh1 7. Be4 Qxe4 {stalemate} 1/2-1/2

[Event "2.hm Problem-Forum"] [Site ""] [Date "2011.03"] [Round ""] [White "Krug=P"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "5k1K/1p6/3P1P2/8/1b3N1N/p1q5/4R3/8 w - - 0 1"] [PlyCount "31"] [EventDate "2010"] 
 1. Kh7 Qb3 (1... Qxf6 2. Nhg6+ Kf7 3. Ne5+ Qxe5 4. Rxe5 $18) 2. Ne6+ $1 (2. Nhg6+ $2 Kf7 3. d7 Qd1 4. Ne5+ Kxf6 5. Ng4+ (5. d8=Q+ Qxd8 6. Nh5+ Ke6 (6... Kf5 7. Ng7+ Kf6 8. Ng4+ Kg5 9. Ne6+ Kxg4 10. Nxd8 Kf3) 7. Nc6+ Kd7 8. Nxd8 Kxd8 9. Nf6 b5 10. Kg6 Ba5 11. Ne4 Kd7 12. Kf5 Bb6 13. Nd2 Bd4 14. Nb3 Bh8 15. Ke4 Kd6) 5... Kg5 $1 6. d8=Q+ Qxd8 7. Ne6+ Kxg4 8. Nxd8 Kf3 9. Rc2 (9. Ra2 Ke3 10. Nxb7 Kd3 $11 {EGTB}) 9... b6 10. Nc6 Bc5 $11 11. Rc4 (11. Na7 Ke3 12. Nb5 Kd3 13. Rc3+ Kd2 14. Rg3 Kc2 15. Nxa3+ Bxa3 16. Rxa3 b5 $11) 11... Ke3 12. Kg6 Bd6 13. Kf6 Kd3 $11) (2. Re7 $2 Qf7+ $1 $11) 2... Kf7 3. Ng5+ Kxf6 4. Kh6 Bc3 (4... Bxd6 5. Ne4+ Kf7 6. Nxd6+ Kf6 7. Ne4+ Kf7 8. Ng5+ Kf6 9. Ng6 Qb6 10. Re5 Qd8 ( 10... Qc7 11. Nh7+ Kf7 12. Nh8+ Kg8) 11. Re1 Qd3 12. Nh7+ Kf5 13. Re5+ Kg4 14. Rg5+ Kh3 15. Nf4+) (4... Qg8 5. Nh7+ Qxh7+ 6. Kxh7 Bxd6 7. Nf3 $18) 5. d7 Ba5 6. Ne4+ $1 (6. Ng6 $2 Qb5 7. d8=Q+ (7. Rf2+ Qf5) 7... Bxd8 8. Rf2+ Qf5 9. Nh7+ Ke6 10. Nhf8+ Kf6 11. Nd7+ Ke6 12. Ngf8+ Qxf8+ 13. Nxf8+ Kd5 14. Ra2 Be7 15. Ng6 Kc4 16. Nxe7 Kb3 $11) 6... Kf7 7. Rf2+ Kg8 8. Rg2+ Kh8 9. Ng6+ Kg8 10. Ne5+ Kh8 11. Ng5 $1 Qe3 12. Kg6 Kg8 13. Kf5 $1 Kh8 14. Nef7+ Kg8 15. Ne6+ $1 Kxf7 16. Rg7# 1-0

[Event ".c Problem-Forum"] [Site ""] [Date "2011.03"] [Round ""] [White "Hornecker=S"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/1p1p4/p1p2p2/P1P5/1P6/8/3KP3/6k1 w - - 0 1"] [PlyCount "39"] [EventDate "2010"] 
 1. Kc1 $3 Kf1 2. Kd1 Kf2 3. Kd2 Kg3 4. Kc3 Kg2 (4... Kf4 5. Kd4 Kf5 6. Kd3 Ke5 7. e4 $1 Kf4 8. Kd4 Kg4 9. Kc4 Kg5 10. Kc3 Kh4 11. Kd4 Kh3 12. Kd3 Kh2 13. Kd2 Kg3 14. Kc3 $1 Kg4 15. Kc4 Kf3 16. Kd3 Kf2 17. Kd2 Kg3 18. Kc3 $11) 5. Kc2 Kh2 (5... Kg3 6. Kc3 Kg4 7. Kd4 Kf4 8. e4 $11 {s.o.}) 6. Kd2 Kh3 7. Kd3 Kg2 8. Kc2 Kf2 9. Kd2 Kf1 (9... Kg1 10. Kc1 Kh1 11. Kd1 Kh2 12. Kd2 Kh3 13. Kd3 Kh4 14. Kd4 Kh5 15. Kd3 (15. Ke3 Kg4 16. Kd4 f5 17. Ke5 f4 18. Ke4 Kg3 19. Kd3 f3 20. exf3 Kxf3 $11) 15... Kg4 16. Kc4 (16. Kd4 $2 f5 17. Ke5 f4 18. Kd6 Kg3 19. Kc7 Kf2 20. Kxb7 Kxe2 21. Kxa6 f3 22. Kb7 f2 23. a6 f1=Q 24. a7 Qa1 25. a8=Q Qxa8+ 26. Kxa8 Kd3 27. Kb7 Kc4 28. Kc7 Kxb4 29. Kxd7 Kxc5 $19) 16... f5 17. e3 Kg5 18. Kd3 Kh4 19. Kd4 Kg3 20. Kc3 $1 Kh2 21. Kd2 Kh1 22. Kd1 Kg1 23. Kc1 Kf2 24. Kd2 Kg1 25. Kc1 $11) 10. Kd1 f5 11. e3 $1 Kg1 12. Kc1 Kg2 13. Kc2 Kg3 14. Kc3 Kf3 15. Kd3 Kf2 16. Kd2 Kf3 17. Kd3 Kg4 18. Kc4 f4 19. exf4 Kxf4 20. Kd4 $11 1/2-1/2

[Event ".c Problem-Forum"] [Site ""] [Date "2011.09"] [Round ""] [White "Akobia=I"] [Black ""] [Result "1-0"] [SetUp "1"] [FEN "4k1K1/8/1Rp2p2/n5p1/8/8/2P5/8 w - - 0 1"] [PlyCount "13"] [EventDate "2011"] 
 1. Ra6 $1 (1. Rb4 $2 c5 2. Re4+ Kd7 3. Kf7 f5 $11) 1... Nb7 $1 ({or also} 1... Nc4 2. Rxc6 Ne5 (2... Ne3 3. Re6+ {domination}) 3. Rxf6 g4 4. Re6+ { echo domination}) 2. Rxc6 (2. Kg7 $2 Kd7 3. Kxf6 ({NV K. Holze} 3. Ra7 Kc7 $1 4. Kxf6 Kb6 5. Ra1 Kc5 6. Kxg5 Nd6 $11 {re remis laut EGTB}) 3... Kd6 4. Ra7 ( 4. Kxg5 Nc5 $11) 4... Nc5 5. Kxg5 (5. Kf5 Kd5 $11) 5... Ne6+ 6. Kf6 Nd4 7. c4 Nb3 $11) 2... Nd8 (2... f5 3. Kg7 Kd7 4. Rb6 Nd6 (4... Kc7 5. Rb1 $18) 5. Kf6 g4 6. Rb3 g3 7. Ke5 $1 (7. Rxg3 $2 Ne4+ $11) 7... Nc4+ 8. Kf4 $18) (2... Ke7 3. Rc7+ {echo domination}) 3. Rxf6 {main B} Ke7 ({main A} 3... Kd7 4. Rf5 $1 ({ Thematic try} 4. Rg6 $5 Ne6 5. Kf7 Nd4 { (impossible wRd5+ with an echo domination)} 6. Rxg5 Nxc2 7. Rd5+ Kc6 (7... Kc7 $2 8. Rc5+ {echo domination})) 4... Ne6 5. Kf7 Nd4 6. Rd5+ {echo domination}) 4. Rg6 $1 (4. Rf5 $2 Ne6 5. c4 g4 (5... Kd6 $2 6. Kf7 Nc5 7. Rxg5 Na4 8. Rb5 $1 Nc3 9. Ra5 $1 Ne4 10. Rd5+ Kc6 11. Ke6 $18)) 4... Ne6 5. c3 $3 {zz} ({ Thematic try} 5. c4 $5 Nc5 $1 (5... Kd6 $2 6. Kf7 $18) 6. Rxg5 Nd7 $1 (6... Ne4 $2 7. Re5+ {echo domination}) 7. c5 Kd8 8. Rd5 Kc7 9. Kf7 Kc6 10. Rd6+ Kc7 11. Rd5 Kc6 12. Rd6+ {positional draw}) 5... Nc5 6. Rxg5 Ne4 (6... Na4 7. Rg3 Kd6 8. Kf7 $18) 7. Re5+ {echo domination} 1-0

[Event ".c Problem-Forum"] [Site ""] [Date "2012.09"] [Round ""] [White "Tallaksen Østmoe=G"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "8/4K1p1/4P3/p3k3/P7/8/3r3p/1R6 w - - 0 1"] [PlyCount "27"] [EventDate "2012"] 
 {White must play actively, otherwise Black simply pushes his g-pawn.} 1. Re1+ ( 1. Rb5+ $2 Rd5 2. Rb1 Kf4 $19) (1. Kf7 $2 Rf2+ 2. Kxg7 Kxe6 $19) (1. Rf1 $2 g5 2. Kf7 g4 3. e7 Rd7 $19) 1... Kf4 (1... Kd5 2. Kf7 Re2 (2... Rf2+ 3. Kg8 $1 h1=Q 4. Rxh1 Kxe6 5. Rh5 Rf5 6. Rxf5 Kxf5 7. Kxg7 $11) 3. Rd1+ Ke5 (3... Kc5 4. e7 g5 5. Rh1 $11) 4. Rf1 $1 (4. e7 $2 Kf4 $19) 4... Rf2+ 5. Rxf2 h1=Q 6. e7 $11 ) (1... Kf5 {allows several ways to draw, one of them being} 2. Kf7 Re2 (2... g5 $4 3. e7 Rd7 4. Rh1 $18) 3. Rxe2 h1=Q 4. e7 Qh5+ 5. Kxg7 Qxe2 6. Kf8 $11 { and compared to the main line, Black gains nothing from having the king on f5 instead of f4.}) 2. Kf8 $1 (2. Kf7 $2 g5 $1 3. e7 Rd7 $19) 2... Re2 (2... g5 $4 3. e7 $18) 3. Rxe2 $1 (3. Rh1 $2 g5 4. e7 Kg3 $19) 3... h1=Q 4. e7 (4. Kxg7 $2 Qg1+ 5. Kf6 (5. Kf7 Qf1 $1 6. e7 Kg5+ $19) 5... Qg5+ 6. Kf7 Qh5+ 7. Kf8 Qf3 $1 $19) 4... Qh8+ 5. Kf7 Qh5+ 6. Kxg7 Qxe2 (6... Qe8 $11 { Black can make no progress as long as White's rook stays on the e-file.}) 7. Kf8 {Black cannot prevent White's pawn from queening, nor can he win the a-pawn without exchanging queens.} Kf5 8. e8=Q Qxe8+ 9. Kxe8 Ke6 10. Kf8 $1 ( 10. Kd8 $2 Kd6 $19) 10... Kd6 11. Kf7 Kc5 12. Ke6 Kb4 13. Kd5 Kxa4 14. Kc4 1/2-1/2