N+pp vs Q

[Event "Black to play and win"] [Site "?"] [Date "2007.??.??"] [Round "?"] [White "Villeneuve, A."] [Black "3001.20"] [Result "0-1"] [SetUp "1"] [FEN "8/2P2k2/8/1N3P2/8/8/6K1/2q5 b - - 0 1"] [PlyCount "49"] [EventDate "2007.??.??"] [SourceDate "2000.07.25"] {After Chekhover 1956.} 1... Qc2+ (1... Ke7 $1 2. f6+ Kd7 $1 (2... Kxf6 $2 3. Nd6 $8 $11) 3. f7 Qg5+ $1 {: text}) 2. Kg1 $1 {Hoping for a fortress, which everyone has believed in for 50 years !} (2. Kg3 Ke7 $1 3. f6+ (3. Kf4 Kd7) 3... Kxf6 4. Nd6 Qxc7 $8 $19 {and the pinned knight cannot jump on e8}) (2. Kh1 Ke7 $1 3. f6+ Kd7 $8 4. f7 Qf2 $3 $19 {: the beautiful arrangement of white pieces is destroyed}) (2. Kf1 $6 Qxf5+) 2... Qc5+ $1 (2... Ke7 $1 3. f6+ Kd7 $8 {idem}) 3. Kg2 $1 (3. Kh1 Ke7 $1 4. f6+ Kd7 {as above}) (3. Kf1 $6 Qxb5+) (3. Kh2 Ke7 4. f6+ Kxf6 $1) 3... Ke7 $8 4. f6+ Kd7 $8 (4... Kxf6 $2 5. Nd6 $3 {[#]: typical achievement}) 5. f7 Qg5+ $1 ({Chekhover's idea was} 5... Kc8 $6 6. Kh3 Qf8 7. Kg2 Kb7 8. Kg1 Kb6 $2 (8... Kc6 $4 9. c8=Q+ $8 Qxc8 10. Na7+ $8) ( 8... Qe7 $1) 9. Nd4 $3 {[#]} Qg7+ (9... Qc5 10. Kg2) 10. Kh2 $1 Qh8+ 11. Kg2 $1 $11 { but Black has a laborious manoeuvre that will bring the White King within check range of the d4-square, reducing to nothing this nice rescue}) (5... Ke6 $2 6. Nd6 $1 {or on a7}) (5... Ke7 $6 6. Kh3 Qf5+ (6... Kf8 7. Kg2 Kg7 $2 8. Nd6 $3 {again}) 7. Kg2 Qg4+ 8. Kf2 Qf4+ 9. Kg2 Kd7 10. Kh3 Qf2 11. Kg4 Qf6 $1 12. Kg3 Qg5+ $1 13. Kh3 Qf4 $1 14. Kg2 Qg4+ $1 {: text on 7th move}) 6. Kh2 (6. Kf3 Qg7 $1 7. Ke4 Qf6 $1 8. Kd3 {: see analysis on 12th move}) 6... Qh4+ $8 7. Kg2 Qg4+ $8 8. Kh2 (8. Kf2 Qg7 $1) 8... Qf3 $8 9. Kg1 Qg3+ $8 10. Kf1 (10. Kh1 Qf2 $1 {as already seen}) 10... Qg7 $8 11. Ke2 Qf6 $3 {[#]} 12. Ke3 (12. Kd3 Qf4 $3 {[#]} 13. Kc3 (13. Ke2 Qc4+ $1 14. Ke3 Ke7 $1 {: text on 16th}) (13. Kc2 Qb4 $1) 13... Ke7 $1 {(control of c8 via c1)} 14. Kd3 Qf3+ $1 15. Kd2 Qc6 $1 {: text on 15th}) 12... Qe6+ $8 13. Kd3 (13. Kd4 Qe7 $1 14. Kd3 Qc5 $1 15. Ke4 Qc4+ $1 16. Ke3 Ke7 $8 17. Kd2 Qc5 $8 {: text}) 13... Ke7 $3 {[#]A necessary return to free his Queen. But it will only be temporary.} (13... Qe7 $6 14. Kd4 Qf6+ $8 ) 14. Kc3 (14. Kd4 Qc6 $1 15. Ke3 Qc4 $3 {: text}) 14... Qa6 $1 (14... Qc6+ $6 15. Kd4 (15. Kb4 Qc1 $1 16. Ka5 Qc5 $8) 15... Kf8 $1 16. Ke3 Qc4 $1) 15. Kd2 ( 15. Kb4 Qc6 $1 16. Ka5 (16. Nd4 Qd6+ $3 17. Kb5 Kd7 $3 18. Ne6 Qc6+ $8 19. Kb4 Qe4+ $8 20. Kb5 Qf5+ $1 21. Nc5+ Kd6 $1) 16... Qc5 $8 {[#]} 17. Ka6 Kd7 $3 {(text on 18th with wKa6 instead of d1)} 18. Ka5 Kc8 $1 19. Ka6 (19. Ka4 Kb7 20. Ka5 Qe7 {idem}) 19... Qc6+ $1 20. Ka5 Qf6 $8 21. Kb4 Kb7 $8 22. Ka3 (22. Kc5 Qf4) 22... Qe7+ 23. Ka4 Qf8 $3 {[#]} 24. Ka5 Qc5 $1 25. Ka4 Kb6 26. Nd6 Qc6+ $1 27. Kb3 Qf3+ $8 28. Kc4 Kxc7 $19) (15. Kd4 Qc6 $1 16. Ke3 Qc4 $3 {idem}) 15... Qc6 $8 16. Ke3 (16. Kd1 Qc5 $1) 16... Qc4 $3 {[#]} ({On} 16... Qc5+ $6 17. Kf3 {all would have to be redone}) 17. Kd2 Qc5 $3 {[#]The key case: the wK is now confined to to the triangle d1-d2-e1.} 18. Kd1 (18. Ke1 Kd7 $8 19. Kd1 (19. Kd2 Kc8 $1 {: text }) 19... Qf2 $1 20. Kc1 Kc8 $1 21. Kb1 (21. Kd1 Kb7 $1 22. Kc1 Qc5+ $1 {: text on 24th}) 21... Qc5 $1 22. Ka2 Kd7 $1 23. Ka1 Ke7 $1 24. Ka2 Kf8 $1 25. Ka1 Qc4 $1 $19) 18... Kd7 $3 {[#]Taking up his original idea of moving to b6.} 19. Kd2 Kc8 $8 20. Kd1 Kb7 $8 21. Ke1 {the last trap.} Qe7+ $3 (21... Kb6 $2 22. Nd4 $3 {[#]} (22. Nd6 $2 Qe5+ $1 23. Kf1 Qf4+ $8 24. Kg2 Kxc7 $8) 22... Qe5+ (22... Kb7 23. Ne6 $8) (22... Qe7+ 23. Kd1 $1) 23. Kf1 $8 Qf6+ 24. Kg2 $3 {[#]} Kb7 (24... Qg7+ 25. Kh2) 25. Ne6 $3 {: an unforeseen apotheosis of Chekhover's idea}) 22. Kd2 (22. Kd1 Qb4 $3 {[#]} 23. Kc2 Qc5+ $8 {text}) 22... Qg5+ $8 23. Kd1 (23. Ke1 Qc5 $1 {Z} 24. Kd1 Kb6 $8) 23... Qd5+ $8 24. Kc1 (24. Ke1 Qc5 $1) 24... Qc5+ $8 {The ruthless and refined torture of the White King by the Black Queen is coming to an end.} 25. Kd2 Kb6 $3 {The presence of the wK on the "d" column prohibits Nd4 and Nd6.} 0-1