patzer2: Here's a look at today's Friday puzzle (27...?) with the chessgames.com opening explorer, Deep Fritz 15 and Stockfish 8:<1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. d4 Bd7 7. O-O Qc8 8. Re1 Bh3 9. Bh1!?> Though it seems anti-positional, this interesting move, which attempts to avoid exchanging off the White Squared Bishop at all costs, is not such a terrible move. The computers indicate White still has a small edge or at least equality with 9. Bh1.
However, it certainly can't be the best option for the first player. White IMO secures more advantage with the developing move 9. e4
to
(+0.47 @ 26 depth, Stockfish 8) as in a former US Champion's win in Reshevsky vs S Kagan, 1971.
<9...Nc6 10. c4 Re8 11. d5 Nd8 12. Nc3 e5 13. e4 b6 14. b4 a5 15. a3 axb4 16. axb4 Rxa1 17. Qxa1 Nb7 18. Qa7 h6 19. Nd2 Nh5 20. Bf3 Rf8 21. Rc1> White has managed to obtain an advantage, but in the heat of battle misses a chance to strengthen his grip on the position.
Much stronger is 21. Be2! Bf6 22. c5
(+1.39 @ 32 depth, Stockfish 8),
dominating the center and creating threats on both wings.
<21... Bf6 22. Nb3?!> This attempt to move the Knight on d2 to a
more active square interferes with the defense of White's center and Kingside.
Much better is getting the Queen back into play and holding the position with 22. Qa4 Bg4 23. Qc2
(+0.41 @ 32 depth, Stockfish 8)
<22...22... Bg5 23. Rc2 f5 24. c5?> Allowing 24...f5!
(-4.12 @ 27 depth, Stockfish 8,) this is the losing move.
The saving maneuver White misses is 24. Qa1 Nf6 25. Qd1 = (0.00 @ 29 depth, Stockfish 8.)
<24... f4
> (-4.12 @ 27 depth, Stockfish 8) Now Black is winning.
<25. Bh1> If 25. Bxh5, Black wins after 25...gxh5 26. Qa6 fxg3 27. hxg3 h4 28. Qe2 Bg4 29. Qf1 bxc5 30. Bc1 Bf3 31. Bxg5 hxg5 32. Ne2 Bxe4 33. Rb2 Qg4 34. Nd2 Bxd5
(-7.44 @ 20 depth, Deep Fritz 15)
<25... fxg3 26. hxg3 Qg4 27. Bc1 Nxg3!> This forces mate-in-five and solves the Friday May 12, 2017 chessgames.com puzzle.
<28. fxg3 Bxc1> This works great, but mating quicker is 28... Rf1+ 29.
Kh2 Qh5 30. Bxg5 hxg5 31. Qb8+ Bc8+ 32. Kg2 Qxh1#.
<29. Nxc1> White can drag it out a bit longer with 29. Kh2 Be3 30. Bg2 Bxg2 31. Kxg2 Rf3 32. Qb8+ Kg7 33. Qxc7+ Kf6 34. Qe7+ Kxe7 35. cxd6+ Nxd6 36. Ne2 Rf2+ 37. Kh1 Qh3+ 38.
Kg1 Qh2#.
<29... Rf1+ 30. Kh2 Qh5 31. Qb8+ Bc8+ 0-1> White resigns in lieu of 32.
Kg2 Qxh1# or 32... Qh3#.