www.arves.org - Zadachy i Etyudy 2010

Studies awarded in the Russian Magazine tournament Zadachy i Etyudy 2010.

[Event "Hm  Zadachy i Etiudy"] [Site ""] [Date "2010.05.21"] [Round ""] [White "Akobia=I"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "3b4/1pN5/4N3/8/K2n4/8/P7/B1k5 b - - 0 1"] [PlyCount "32"] [EventDate "2010"] [SourceDate "2005.01.24"] 
 1... b5+ 2. Kb4 (2. Nxb5 $2 Nxe6 $11) 2... Be7+ 3. Nc5 Nc2+ $1 (3... Nc6+ 4. Kxb5 Na7+ 5. Kb6 Nc8+ 6. Kc6 Kb1 7. a4 $18) 4. Kxb5 Na3+ $1 (4... Nxa1 5. a4 Nc2 6. N7e6 Na3+ 7. Kb4 Nc2+ 8. Kc4 Bd6 9. a5 Ne3+ (9... Bb8 10. Nd7 Ba7 11. Nb6 $18) 10. Kb5 Bb8 11. Nd7 Ba7 12. Nb6 $18) 5. Kb4 (5. Ka4 Bxc5 6. Kb3 Nb1 7. Bb2+ Kd2 8. Na6 Bd6 9. a4 (9. Nb4 Ke3 10. Bc1+ Ke4 $11) 9... Kd3 10. Nb4+ Ke4 $11) 5... Bxc5+ (5... Nc2+ 6. Kc4 Kb1 (6... Nxa1 7. a4 $18) 7. a4 Nxa1 8. Nb7 Nc2 9. a5 Nb4 10. Nd5 Nc6 11. a6 $18) 6. Kxc5 Kb1 7. Be5 $3 {zz} ({Thematic try } 7. Bf6 $5 Kxa2 8. Kb4 Nc2+ 9. Kc3 Na3 10. Nd5 Nb1+ 11. Kb4 (11. Kc2 Na3+ 12. Kc3 Nb1+ 13. Kb4 Nd2 14. Kc3 Nb1+ $11) 11... Nd2 {draws, because bN finds a refuge as wB cannot interfere with it as in main variant by move 12.wBf4!}) 7... Kxa2 8. Kb4 {zz} (8. Nd5 $5 Kb3 $11) 8... Nc2+ 9. Kc3 Na3 $1 (9... Kb1 10. Bf4 $18) 10. Nd5 Nb1+ 11. Kb4 $1 {zz} 11... Nd2 12. Bf4 { compare with the thematic line 7.Bf6!?} 12... Ne4 ({main} 12... Nb3 13. Kc3 Nc5 14. Bc1 Ne6 15. Nb4+ Kb1 16. Be3 { win. The bK in isolation and bN cannot help to it,}) 13. Kc4 Kb2 14. Kd4 Nf2 15. Ke3 Nd1+ 16. Kd2 Nf2 17. Nf6 {and win with domination.} 1/2-1/2

[Event "c.  Zadachy i Etiudy"] [Site ""] [Date "2010.12.05"] [Round ""] [White "Akobia=I"] [Black ""] [Result "1/2-1/2"] [SetUp "1"] [FEN "5N2/5P2/2B5/5q1N/4R3/4Kp2/5P1p/7k b - - 0 1"] [PlyCount "32"] [EventDate "2009"] [SourceDate "2005.01.24"] 
 1... Qxf7 {main line B Now, at first sight is better the move 2.Sg3+ for rescue of wS. However, this is only a try. So, White sacrifice the Sh5:} ({main } 1... Qxh5 2. Ng6 Qc5+ 3. Kxf3 $1 Qc3+ 4. Kg4 $1 (4. Kf4 $2 Qf6+ $1 5. Ke3 Qc3+ 6. Kf4 Qf6+ 7. Ke3 Qc3+ {perpetual check}) 4... Qxc6 5. Re1+ Kg2 6. f8=Q Qxg6+ 7. Kh4 Qh7+ ({or also} 7... Qd3 8. Qf6 $3 Qh7+ 9. Kg5 $1 Qg8+ $1 10. Kh6 $3 h1=Q+ 11. Rxh1 Kxh1 12. f4 $3 $18) 8. Kg5 $1 Qd3 9. Rc1 $3 Qd2+ $1 10. Qf4 Qd8+ 11. Kg4 $1 Qd7+ (11... Qg8+ 12. Qg5 $18) 12. Qf5 $1 Qg7+ 13. Qg5 $18) 2. Ne6 $1 (2. Ng3+ $2 Kg2 3. Ne6 Qa7+ 4. Rd4 Qa3+ 5. Rd3 Qc1+ $11) 2... Qxh5 3. Rc4 $1 (3. Rd4 $2 Qe5+ 4. Kxf3 (4. Be4 Qxe6 5. Kxf3 Qb3+ 6. Ke2+ Kg1 $11) 4... Qh5+ 5. Rg4 (5. Kg3+ Kg1 $11) 5... Qd5+ 6. Bxd5 {stalemate}) 3... Qe5+ 4. Kxf3 Qb2 $1 5. Rd4 $1 Qc2 6. Be4 $1 (6. Ke3+ $2 Kg1 7. Rg4+ Kf1 8. Bg2+ Ke1 $11) 6... Kg1 $3 (6... Qb3+ 7. Ke2+ Kg1 8. Rd1+ Qxd1+ $1 9. Kxd1 Kxf2 10. Ng5 $1 $18 ) (6... Qc3+ 7. Ke2+ Kg1 8. Rd1+ Qe1+ 9. Rxe1#) 7. Bxc2 {Phoenix!->} 7... h1=Q+ 8. Ke2 $1 (8. Ke3 $2 Qh3+ 9. Ke2 Qxe6+ $11) 8... Qh5+ 9. f3 Qb5+ $1 (9... Qe5+ 10. Re4 $18) (9... Qh2+ 10. Kd1 $18) 10. Ke3 $1 (10. Bd3 $2 Qb2+ $1 11. Ke3 Qc1+ $1 12. Ke4 Qc6+ 13. Ke5 Qxf3 $11) (10. Rd3 $2 Qe5+ 11. Re3 Qb5+ 12. Kd1 Qd7+ 13. Kc1 Kf2 14. Nc5 Qa7 $1 15. Rc3 Qa1+ 16. Kd2 Qe1+ 17. Kd3 Kxf3 $11) 10... Qe5+ $1 11. Re4 Qc3+ $1 12. Bd3 Qc1+ 13. Ke2 $1 (13. Kd4 $2 Qa1+ 14. Kc4 Qc1+ 15. Kd5 Qd1 16. Rd4 Qxf3+ $11) 13... Qf1+ (13... Qb2+ 14. Kd1 $1 Qa1+ 15. Kd2 Qa2+ 16. Bc2 Qa5+ 17. Kd3 Qa3+ 18. Ke2 Qa6+ 19. Ke3 Qa3+ 20. Kf4 Kf2 21. Nd4 $18) 14. Kd2 $1 Qxf3 15. Nf4 $3 ({try} 15. Re1+ $5 Kh2 $1 (15... Kg2 $2 { pin->} 16. Be4 $18) (15... Kf2 $2 16. Rf1+ $18) 16. Re2+ Kg1 $1 (16... Kg3 $2 { pin->} 17. Re3 $18) (16... Kh1 $2 {pin->} 17. Be4 $18) 17. Re1+ Kh2 { positional draw}) 15... Qf2+ 16. Ne2+ $1 {selfpin} 16... Kf1 {pin->} 17. Rf4 { and wins} (17. Bc4 $2 Qe1+ (17... Qc5 $2 18. Nc3+ Kg2 19. Bd5 $18) 18. Ke3 Qf2+ 19. Kd2 Qe1+ {perpetual check}) 1/2-1/2