Saturday, July 22, 2017

#1245 McCorkell Annotates

Jack McCorkell has annotated his game vs. LM Mark Kernighan for us:
[Event "Kenilworth Summer Tournament"] [Site "Kenilworth, NJ"] [Date "2017.07.20"] [Round "8"] [White "McCorkell, Jack"] [Black "Kernighan, Mark"] [Result "0-1"] [ECO "C37"] [WhiteElo "1455"] [BlackElo "2219"] [Annotator "McCorkell, Jack & Deep Fritz 14 x64 (60s)"] [PlyCount "48"] [EventDate "2017.06.01"] [EventRounds "14"] [EventCountry "USA"] [Source "McCorkell, Jack"] [SourceDate "2017.07.21"] [SourceVersion "1"] [SourceVersionDate "2017.07.21"] {C37: King's Gambit Accepted: Salvio Gambit} 1. e4 e5 2. f4 exf4 3. Nf3 g5 {The CLASSICAL VARIATION} 4. Bc4 ({It is too late to halt Black's kingside advance with} 4. h3 {Murey-Kosashvili, Tel Aviv 1999, continued} Nc6 5. Nc3 Bg7 6. d4 d6 7. Bc4 h6 8. a3 Nf6 9. O-O O-O 10. Re1 Nh5 $17 {Nick DeFirmian, MCO}) ({KGA CLASSICAL VARIATION ->} 4. h4 $1 g4 5. Ne5 $1 {the key position of the KIESERITZKY GAMBIT - White moves the knight several times but gains the g4 pawn or the one on f4, at times losing the e4 pawn. The pawn push to h4 weakens White's kingside (in some variations a black knight comes to g3 via h5), but Black's king is also in a rather precarious positon. As a result the continuations that result are tactically complex and have strategic possibilities for both players. Black can continue with 5...d6, sacrificing the g4 pawn in exchange for good piece play after 6. Nxg4 Nf6, 7. Nxf6 Qxf6, or he can play classical - notes from COE, New In Chess} Nf6 6. d4 d6 7. Nd3 Nxe4 8. Bxf4 {The key position of the Classical Variation of the KGA. It seems to go against common sense to concede the e4 pawn for the one on f4: in addition Black has an extra pawn and an active knight on e4. Nonetheless, White receives good compensation: Black's kingside has many weaknesses, the g4 pawn, even though a material advantage, has the negative quality of restricting black activity on the wing, and perhaps Black would be better off without it(as in the case in the 5 ... d6 variation). In addition, White's rooks on e1 and f1 will exert unpleasant and ongoing positional pressure. This is also the case in variations in which the queens are exchanged. Black almost always castles queenside. White sometimes castles queenside too, and on other occasions he moves the king to d2 or otherwise to f2. In conclusion, after 8 ... Qe7 or 8 ... Bg7, the position is dynamically balanced. - notes from Chess Openings Essentials, New In Chess, GM Komarov, GM Djuric and IM Pantaleoni}) 4... g4 5. Ne5 {SALVIO GAMBIT, Nick DeFirmian - MCO, is interesting} ({the MUZIO GAMBIT alternately continues} 5. O-O $5 gxf3 6. Qxf3 Qf6 7. e5 $6 (7. c3 $1 Nc6 8. d4 Nxd4 9. Bxf7+ Qxf7 10. cxd4 Bh6 11. Nc3 d6 12. Nd5 Be6 13. Nxf4 Bxf4 14. Bxf4 O-O-O 15. d5 Bd7 16. Qc3 Qf6 $11 {ECO}) 7... Qxe5 8. Bxf7+ (8. d3 $2 Bh6 9. Nc3 Ne7 10. Bd2 Nbc6 11. Rae1 Qf5 12. Nd5 Kd8 13. Qe2 b5 $1 14. Nxe7 Qc5+ 15. Rf2 Nxe7 $1 $17 {Korchnoi}) 8... Kxf7 9. d4 Qxd4+ 10. Be3 Qf6 11. Bxf4 Ne7 $17 {BCO - Kasparov and Keene)} (11... Nc6) 12. Nc3 Nf5 13. Ne4 Qg6 14. g4 Be7 15. Kh1 Nh4 {(Shussler-Akvist, Sweden 1976)} 16. Qe3 Qc6 $13 (16... Kg8 $1 17. Be5 b6 {intending ... Bb7-/+})) 5... Qh4+ 6. Kf1 Nh6 {The LAST BOOK MOVE - Fritz} (6... Nc6 {is an interesting SALVIO GAMBIT continuation - Nick DeF} 7. Bxf7+ {7. Nxf7 is too dangerous} Ke7 8. Nxc6+ dxc6 9. Bb3 Nf6 10. d3 {the position is approximately even - Nick DeFirmian, MCO}) 7. Qe1 Qf6 8. d4 d6 {Black threatens to win material: d6xe5} 9. Qf2 $4 {the position is going down the drain} (9. Nd3 $142 Qxd4 10. Bb3 $15) 9... dxe5 $19 10. dxe5 Qxe5 11. Nc3 c6 (11... Be6 $5 {keeps an even firmer grip} 12. Bxe6 fxe6 13. Bxf4 $19) 12. Bxf4 Qh5 13. Qd4 (13. Re1 Nd7 $19) 13... Rg8 14. Rd1 Be7 (14... Nd7 {might be the shorter path} 15. e5 Be7 16. e6 $19) 15. Ne2 Be6 (15... Nd7 $142 $5 {makes it even easier for Black} 16. Ng3 Qh4 17. Ke2 $19) 16.Bxe6 fxe6 17. Ke1 Nf7 (17... Rg6 $142 $5 18. Qh8+ Ng8 $19) 18. Bxb8 $17 Rxb8 (18... Qa5+ 19. c3 Rxb8 20. Qd7+ Kf8 21. Nf4 $17) 19. Qd7+ Kf8 20. Nf4 Qa5+ 21. c3 (21. Ke2 $5 Rg6 22. Nxg6+ hxg6 23. Qxe6 Qb5+ 24. Rd3 $17) 21... Rg6 $1 {Black is still ahead} 22. Nxg6+ hxg6 23. Qxe6 Qg5 24. Rf1 $4 {(mercy suicide) but even a better move would not have saved the game} ({Deep Fritz 14 x64:} 24. Rd2 Re8 25. Qb3 {-2.22/28}) ({Deep Fritz 14 x64:} 24. Rd7 Rd8 25. Rxd8+ Nxd8 26. Rf1+ Kg7 27. Qd7 Qc1+ 28. Kf2 Qxb2+ 29. Kg1 Qb6+ 30. Kh1 Qc5 31. Qd4+ Qxd4 32. cxd4 c5 33. dxc5 Ne6 34. c6 bxc6 35. e5 c5 36. Kg1 Bg5 37. Rb1 c4 38. Rb7+ Kh6 39. Kf2 c3 {-1.55/29}) (24. Ke2 {Deep Fritz 14 x64:} Re8 25. Qd7 Qf4 26. Rd4 Bg5 27. Rhd1 c5 28. Rc4 Qe3+ 29. Kf1 Ne5 30. Qd6+ Kg7 31. Rxc5 Rf8+ 32. Qxf8+ Kxf8 33. Rxe5 Qf4+ {-3.14/21}) (24. Rd7 $142 Rd8 25. Rxd8+ Nxd8 26. Rf1+ Kg7 27. Qd7 Qc1+ 28. Kf2 Qxb2+ 29. Kg1 $17) 24... Qe3# 0-1

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