| Feb-08-07 | | tatarch: Great puzzle at 18. ? white to play--and a fun game in general. |
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Jun-24-07
 | | chancho: Hair raising stuff... |
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| Jun-03-12 | | computer chess guy: It appears to me that Black can take the Rook (18. .. gxf6), with a difficult but defensible position. Houdini prefers 18. Bc7!:
click for larger viewIf Black tries .. Qxc7, then 19. Nxd5 Qd6 20. Bxc4 bxc4 21. Rde1! . Somewhat better but still losing is .. Qd7, with the variation 19. Nxd5 Qxd5 20. Rfe1! Qxd7 21. Bxc4 bxc4 22. Qxc4. |
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| Feb-27-22 | | Brenin: My choice was 18 Nxd5 Qxd5 19 Rxf6 gxf6 (19 ... Bxf6 20 Bxf6+ and 21 Qe7+ looks horrible for Black) 20 Bxf6 (threatening 21 Qxe7 mate) Qd7 21 Bxh8, leaving White a P up. Have I missed something stronger? |
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| Feb-27-22 | | mel gibson: I saw the text ply straight away but Stockfish 14 chooses a different ply: 18. Rxf6
(18. Bc7 (♗e5-c7
♕d8-d7 ♘c3xd5 ♕d7xd5 ♖f1-e1 ♕d5-d7 ♗b3xc4 b5xc4 ♕e2xc4 ♔e8-f8 d4-d5 ♕d7-b5
♕c4-f4 ♗e7-c5+ ♔g1-h1 ♖a8-e8 ♖e1xe8+ ♔f8xe8 d5-d6 ♔e8-f7 ♕f4-f3 ♗c5xd6
♗c7xd6 ♖h8-e8 h2-h3 ♔f7-g8 ♖d1-d2 h7-h6 ♗d6-g3 a6-a5 ♕f3-d1 a5-a4 ♕d1-c2
♔g8-h8 ♔h1-h2 ♕b5-b4 ♖d2-d3 ♕b4-e4 ♕c2-d2 ♕e4-b7 ♖d3-d7 ♕b7-b5 ♕d2-d4
♖e8-e2 ♕d4-g4 ♕b5xd7 ♕g4xd7 ♖e2xb2 ♕d7-d8+ ♔h8-h7 ♕d8-d3+ ♔h7-h8) +5.56/37
132)
score for White +5.56 depth 37.
I forced Stockfish 14 to play the text ply
and it is close to a draw:
18. Rxf6 gxf6
(18. .. gxf6 (g7xf6 ♗e5xf6 ♗d5-f3 g2xf3 ♖h8-g8+ ♔g1-h1 ♔e8-f8 ♗f6-e5 ♕d8-e8 ♘c3-d5
♖a8-d8 ♘d5-f4 ♗e7-g5 ♗b3xc4 b5xc4 ♕e2-e3 c4-c3 b2xc3 ♕e8-f7 c3-c4 ♗g5xf4
♗e5xf4 ♖g8-g6 ♖d1-e1 a6-a5 d4-d5 ♖d8-c8 ♕e3-d4 ♔f8-g8 c4-c5 ♖c8xc5 ♕d4xc5
♕f7xf4 ♕c5-c8+ ♔g8-g7 ♖e1-e7+ ♔g7-f6 ♖e7-e6+ ♔f6-g5 h2-h4+ ♕f4xh4+ ♔h1-g2
♕h4-h6 ♕c8-c4 ♕h6-h5 ♕c4-e4 ♔g5-h6+ ♔g2-f2 a5-a4 ♕e4-f4+ ♕h5-g5 ♕f4-f8+
♔h6-h5 ♖e6xg6 ♔h5xg6 ♕f8-g8+ ♔g6-h6 ♕g8-e6+ ♔h6-g7) -0.54/39 111) score for Black -0.54 depth 39.
It's the reply of Black 18... Nxe5
that which leads to disaster.
18. Rxf6 Nxe5
19. Nxd5
(19. Nxd5(♘c3xd5 ♘e5-c4 ♘d5xe7 g7xf6 ♘e7-c6+ ♔e8-d7 ♘c6xd8 ♖a8xd8 ♖d1-a1 ♖h8-e8
♕e2-h5 ♖e8-e6 ♕h5xh7+ ♔d7-e8 ♕h7-g8+ ♔e8-d7 ♕g8-g4 ♔d7-e7 ♕g4-g7+ ♔e7-e8
♗b3-c2 ♖d8-d6 ♗c2-g6+ ♔e8-d8 ♕g7-f8+ ♔d8-c7 ♗g6-f5 a6-a5 ♕f8-f7+ ♔c7-b6
♗f5xe6 ♘c4xb2 ♗e6-d5 a5-a4 ♕f7-b7+ ♔b6-a5) +13.37/34 145) score for White +13.37 depth 34. |
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Feb-27-22
 | | al wazir: <Brenin: Have I missed something stronger?> 20...Ra7 21. Re1 Rg8 22. Bxe7 Rxg2+ 23. Qxg2 Qxd4+ looks promising |
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| Feb-27-22 | | agb2002: White is one pawn down.
Black threatens fxe5.
The black queen protects the bishop on d5. This and the threat suggest 18.Bc7: A) 18... Qxc7 19.Nxd5 Qd6 20.Rfe1 Ra7 21.Bxc4 bxc4 22.Qxc4, with the threat Re6-Rde1, looks very good for White. B) 18... Qd7 19.Nxe5 Qxd5 20.Rfe1 Qd7 21.Bxc4 bxc4 22.Qxc4 Rc8 23.Rc1, followed by d5-d6, looks very good for White. I have considered Nxd5, Bxf6, Rxf6 and Qh5+ but Bc7 seems to be much easier and safer. |
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| Feb-27-22 | | Brenin: <al wazir>: After 18 Nxd5 Qxd5 19 Rxf6 gxf6 20 Bxf6 Ra7, simply 21 Bxh8 (rather than Re1) looks good for White. |
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Feb-27-22
 | | chrisowen: Towel lit v auld Rxf6 garrulous abridge it v i lug ah c rack it v towel lit v auld moves it law it small it v i marvellous vin low it v i flip pg gack bodkin i boshed it v i hi quandary jen coz it zuma ay v it v i same it v i churlish wink nifty pot job duck joules it hertz no it v i gab fluffed it v i heff danks it huh v it finish accomodate flick about lo at ha huffle gg ah jug elf gabs afflect pack v it free it a bind it v i snub kob accord mc ro vin tic ai sho oh c if it let hod man lint haagen dazs no snog z it via good quad muddle ar cj honk lo md nt o gg dock it was bon c can v it died it fat hi gi z it bate v it beer it v i rat c cd v it v i c tee v it v i c he fed v it end cd oy it cc dt fore it v i cars cd tees v it zac at cad it v i bide it fin hog v it hard to ft rakes it fd ank joy it nn chet rote v it v i hon v it v i cj ny tears it v i tan z it void it zest arid na to v it v u ties it v tara div it z on date v it v i star v it z i no rat dantes v it v i oz it z torre it ash c et v it don vita res traf rest it v and relax it van stair z its eat no div it vet her tn joy confide it v i array Rxf6 edict! |
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| Feb-27-22 | | gofer: Just like <computer chess guy> in 2012 and <agb2002> today, I also chose 18 Bc7. It seems to resolve a lot of the "puzzle questions" like "How do I open the e file without losing tempo?" and poses black with lots of issues to sort out all at the same time. Stockfish (25 ply) agrees: 18 Bc7 <+4.0> Stockfish (28 ply) doesn't like Rxf6 anyway as much 18 Rxf6 <+1.0> So, I am a bit surprised that no one else is posting, when the answer isn't the strongest move by a long shot... |
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| Feb-27-22 | | AlicesKnight: I looked first at 18.Bc7 and its consequences. I saw some of what <agb2002> and others above have said (but not as much!). I'll take the word of the silicon-keepers on the other outcomes (including 18.Rxf6). Interestingly unclear - White wins but with questions about how ... |
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| Feb-27-22 | | JohnBoy: I went w 18.Rf6 after toying around w several other options. <mel> Gives SF�s survival path, but there is no way I saw 19�Bf3, and can�t imagine Ziatdinov did either. |
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| Feb-27-22 | | JohnBoy: It seems my phone is having trouble posting symbols - like apostrophe or ellipsis. Any suggestions? |
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| Feb-27-22 | | King.Arthur.Brazil: The King (me, of course) saw this line: 18. ♖xf6 gxf6 19. ♗xf6 ♖f8 20. ♕h5+ ♔d7 21. ♕xd5+ ♔c7 22. ♗xc4 ♕xd5 23. ♗xd5 ♖ae8 24. ♗xe7 ♖xe7 25. ♗f3 I guess is not much, so I must be missing something. Maybe, some fishouse will tell after dinner. |
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| Feb-27-22 | | NBZ: I chose Bc7 too. It seems to lead to a dominating position for White in all lines: 18. Bc7 Qxc7 19. Nxd5 Qd8 20. Rfe1 Ra7 21. Bxc4 bxc4 22. Qxc4 and Black's position is hopeless: a pawn down, bishop pinned to the king, no way to castle etc. 18. Bc7 Qd7 19. Nxd5 Qxd5 20. Rfe1 and either Black gives up a piece, or tries 20. ... Qd7 20. Bxc4 bxc4 21. Qxc4 Rc8 22. Rc1. Black still can't castle, is again down a pawn, and will find it very difficult to extricate his pieces. Admittedly this is not as clear-cut as the line, but I would still 100% play White here. |
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Feb-28-22
| | al wazir: <Brenin: After 18 Nxd5 Qxd5 19 Rxf6 gxf6 20 Bxf6 Ra7, simply 21 Bxh8 (rather than Re1) looks good for White.> 21...Qg8. White is a ♙ up, but the attack has been blunted. |
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Kibitzing
sac: 19.Nxd5
