| Apr-27-17 | | sudoplatov: Got it. First looked at Nc3. Then noticed that c2 was defended only by the King; follow the captures and checks.
27 ... Rc2
28 Kc2 Rc8 (noticing the B is the only guard of b2)
29 Kb1 Rc1 (removing the guard)
29 Kc1 Qb2
29 Kd1 Nc3
30 Rc3 bc3 quit here as going to pick up lots of material. |
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| Apr-27-17 | | abuzic: 27...Rxc2
28.Kxc2 Rc8+
29.Nc4 now b2 is extradefended by the Q
29...Rxc4+
30.Kb1
if 30...e3 31.Rhxe3
if 30...Nxc3+ 31.bxc3 bxc3 32.Qc2 |
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| Apr-27-17 | | Walter Glattke: I did not mark the 2nd rook check, but
27.-Nc3+ 28.bxc3 Rxc3 29.Rxc3 bxc3
29.Nb3 a5 
or 28.Ka1 Qa5 29.bxc3 Rxc3 seems to be always , too, not better is
the final position 33.-Bxe4 with 34.Qxc2
cxb2 35.Ke2 b1Q 36.Rxb1 Bxb1 a won ending. |
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| Apr-27-17 | | ONHSdefender: Nice one |
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| Apr-27-17 | | patzer2: Here's my look at today's Thursday puzzle (27...?) and game with the opening explorer and Stockfish 8: <1. e4 c5 2. Nf3 e6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Be3 a6 7. f3 b5 8. g4 Bb7 9. Qd2 Nfd7 10. O-O-O Nb6 11. Qf2?!> This noncommittal move in the face of an aggressive Black attack has not been very good for the first player. Instead, White has fared much better with 11. Nb3 = as in White's win in
Anand vs Ponomariov, 2002. <11... N8d7 12. Bg2 Rc8 13. f4 b4 14. Nce2 Nc4 15. Ng3 Qc7 16. Rhe1 Nc5 17. Kb1 Be7 18. Nb3 Na4 19. Bc1 Bh4
20. Rd3 O-O 21. Bf1 Bf6 22. e5 dxe5 23. Nh5 Be7 24. f5 e4 25. Rh3 Qe5 26. Bxc4 Rxc4 27. Nd2?> The decisive error. Instead, White can hold it near level with 27. f6 Bxf6 28. Na5 = (-0.13 @ 28 depth, Stockfish 8) <27...Rxc2!> This difficult demolition solves the Thursday Apr 27, 2017 chessgames.com puzzle. <28. Kxc2 Rc8+ 29. Kb1> White can make it tougher for Black with 29. Nc4 when the second player must find the win with 29...Bd5! 30. f6 Bd8! 31. Kb1 Bxc4 32. Qd2 h6 33. Ka1
Bb5 34. g5
[34. Rhe3 Nc5 35. Qxb4 g5 (-3.51 @ 29 depth, Stockfish 8)] 34... g6 (-3.54 @ 26 depth, Stockfish 8)
<29... Rxc1+ 30. Kxc1 Qxb2+ 31. Kd1 Nc3+ 32. Rxc3 bxc3 33. Nxe4 Bxe4 0-1> White resigns in lieu of 34. Qxb2 cxb2 35. Ke2 b1=Q 36. Rxb1 Bxb1 (-8.77 @ 26 depth, Stockfish 8) |
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| Apr-27-17 | | AlicesKnight: Saw the break-in correctly; needed to be more precise about the coup-de-grace. 27.Nd2 seems to have opened the gates - a Trojan horse? |
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Apr-27-17
 | | Richard Taylor: I saw Rxc2 but although I noticed the R on h3 missed it could take on c3. I think I would have worked most of this out and played it OTB given I had sufficient time on the clock. A good game by Black and well calculated. |
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| Apr-27-17 | | cocker: 29 Nc4 would have prevented immediate defeat. |
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| Apr-27-17 | | 1stboard: [ cocker: 29 Nc4 would have prevented immediate defeat. ] Bg5 + a move or two later would then come into play ..... |
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| Apr-27-17 | | Lambda: Got the entire line, but I felt I was relying on intuition a lot to tell that the end position was good, and that any of the sidelines would be good. |
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| Apr-27-17 | | morfishine: White ran out of pieces real fast
***** |
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| Apr-27-17 | | goodevans: Poor white. If only there had been another file to the left of the a-file then the final position would have been a win rather than a loss. |
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| Apr-27-17 | | dannydoc: Instead of 39 Kb1, Nc4 wins the game for White. |
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Apr-27-17
 | | Fusilli: <dannidoc> See <Patzer2>'s post. But, <Patzer2>, <<28. Kxc2 Rc8+ 29. Kb1> White can make it tougher for Black with 29. Nc4 when the second player must find the win with 29...Bd5! 30. f6 Bd8! 31. Kb1 Bxc4 32. Qd2 h6 33. Ka1 Bb5 34. g5[34. Rhe3 Nc5 35. Qxb4 g5 (-3.51 @ 29 depth, Stockfish 8)] 34... g6 (-3.54 @ 26 depth, Stockfish 8) > Really? Black is supposed to see all that? And also what happens if 30.b3 instead of the computer-like 30.f6? No longer a Thursday puzzle, that's for sure. |
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Apr-27-17
 | | Jimfromprovidence: 29 Nc4.
It offers to give back a piece in order to allow the queen to defend b2 if/when the king goes to b1. 
click for larger view Wish I had seen it. |
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| Apr-27-17 | | agb2002: Black has the bishop pair and a pawn for a bishop and a knight. White threatens Nxc4 (28.b3 Nc3+ 29.Rxc3 Rxc3).
This threat an the possibility of weakening the white castle lead to consider 27... Rc3, however, after 28.bxc3 Nxc3+ 29.Rxc3 (else Nd1+ wins the queen or delivers mate) 29... bxc3 30.Nb3 Black has two pawns for the piece with an unclear position. Another option is 27... Rxc2, based on the idea 28.Kxc2 Rc8+ 29.Kb1 Rxc1+ 30.Rxc1 Qxg2#: A) 28.Kxc2 Rc8+
A.1) 29.Kb1 Rxc1+ 30.Kxc1 Qxb2+ 31.Kd1 Nc3+ 32.Rxc3 bxc3 with the double threat cxd2 and c2 looks good for Black. For example, 33.Nxe4 Qb1+ 34.Ke2 Qxe4+ 35.Kf1 (35.Kd1 Qxg4+ wins decisive material) 35... Qxg4 - + [2b+3p vs R+N] (36.fxe6 Qxh5 protects f7). A.2) 29.Kd1 Rxc1+ 30.Ke2 (30.Kxc1 transposes to A.1) 30... Qxb2 - + [2b+3p vs R+N] with a similar conclusion. A.3) 29.Nc4 Rxc4+ and Black has two pawns for the exchange and attack. For example, 31.Kb1 e3 32.Rhxe3 (32.Bxe3 Be4+ 33.Ka1 Rc2 wins) 32... Qc7 33.Bd2 Bc5 follwed by Bd4 looks winning. B) 28.f6 Rxb2+ 29.Ka1 (29.Bxb2 Qxb2#) 29... Rxd2+ wins. |
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| Apr-27-17 | | clement41: Happy I calculated this right and till the end.
If 29 Kd1 leaving the option 30 Ke2 unlike 29 Kb1, then 30...Qb5+ wins for black. |
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Kibitzing
sac: 27...Rxc2