patzer2: Here's my look at the game and the Saturday puzzle (21...?) with the chessgames.com opening explorer (OE) and Deep Fritz 14:<1. c4 c5 2. Nc3 e6 3. Nf3 Nf6 4. e4 Nc6 5. Be2 d5 6. e5> Here 6. e5 is not a terrible move, but it's not the most popular choice as it allows Black easy equality with strong counterplay early in the
opening.
Fritz rates 6. e5 as equal but inferior to the popular alternative 6. exd5. OTB results in the OE database support the conclusion that 6. exd5 is better than 6. e5.
With 6. exd5 White won 41.3% and lost 12% of 75 games in the OE with 6. exd5, but with 6. e5 White won only 25% and lost 25% of 12 games.
So my preference is in favor of the popular choice 6. exd5, as
in White's strange win in Khalifman vs G Meier, 2013, where Black resigned in a drawn position.
<6... Ne4 7. O-O Be7 8. Qa4 Bd7 9. Qc2 Nxc3 10. dxc3 Qc7 11. Bf4 dxc4 12. Bxc4 h6 13. h4 g5 14. hxg5?> Giving Black the open h-file with tempo has to be a mistake.
Instead, White should play 14. Bg3 when play might continue 14...gxh4 15. Nxh4 Nxe5!? 16. Qe2 Bd6 17. Nf5! Nxc4 (17... exf5 18. f4
) 18. Bxd6 Nxd6 19. Qe5 Rg8 20. Nxd6+ Kf8 21. Rad1 Bc6 22. g3 = (0.00 @ 23 depth, Deep Fritz 14).
<14... hxg5 15. Bg3> Not 15. Bxg5?? Nxe5 16. Nxe5 Qxe5 17. f4 Qe3+ 18. Qf2 Qxf2+ 19. Rxf2 f6
when White's Bishop is trapped.
<15... O-O-O> As a result of 14. hxg5?, Black now has a clear advantage with a strong attacking initiative and good winning chances.
<16. Rfe1 Rh5 17. Nh2 Rdh8 18. Be2?!> Fritz indicates this is the losing move. However, White is in trouble even with best play.
White can put up more resistance with 18. Rad1 R5h6 19. Qd3 Bd8 20. f4 Na5 21. fxg5 Bxg5 22. Nf3 Nxc4 23. Qxc4 Be7 24. Qf4 R6h7 25. c4 Bc6
(-1.50 @ 21 depth) but Black still has a clear advantage and a strong attack.
<18... R5h6 19. Bg4> If 19. Bc4, Black wins after 19...Na5 20. Be2 f5 21. f4 Bc6 22. Rad1 c4 23. Nf3 Bc5+
(-4.76 @ 20 depth).
<19... f5 20. exf6 Rxh2!> This strong move solves our
Saturday puzzle.
<21. Bh3 R8xh3 22. gxh3> Not 22. Bxc7?? Rh1#.
<22... Qxg3+ 23. fxg3 Rxc2 24. fxe7 Nxe7> Fritz indicates black is clearly winning after the forced sequence leading up to 24...Nxe7
(-2.68 @ 21 depth, Deep Fritz 14).
Though Black has an apparently won game, White plays a few more moves before resigning.
<25. Re5> If 25. Rab1, Black wins quickly after 25...Bc6 26. Rxe6 Nf5
(-3.98 @ 20 depth).
<25... Nf5 26. Rf1 Nxg3 27. Rf8+ Kc7 28. Rg8 Nf5> This wins but much stronger is 28... Bc6! when play might continue 29. Rg7+ Kb6
with mate-in-three to follow.
<29. Rxg5 Rc1+> This wins but stronger is 29... Rxb2 30. Rxc5+ Bc6 31. Rg6 Rxa2 32. Rxe6 Ng3
(-4.86 @ 21 depth, Deep Fritz 14).
<30. Kf2 Rh1 0-1> White resigns in lieu of 31. Rxc5+ Kd6 32.
Ra5 a6
(-2.28 @ 20 depth, Deep Fritz 14).