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Later Kibitzing> |
| Sep-27-11 | | Marmot PFL: I guess I examined this as a puzzle 3 years ago, then completely forgot ever seeing it. The better players though almost always have excellent chess memory. How else could they play several blindfold games simultaneously? A player of Fischer or Kasparov caliber might see this game once and never forget it. |
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Sep-27-11
 | | scormus: A fun game to play over, and and a nicely conducted campain by W. I'm pleased I wasnt looking at it as the Sunday POTD of 3 years. Very nice finish but I'd have had a hard time finding the Q sac. |
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| Jul-25-20 | | Predrag3141: Puzzle of the day today. Qxd7 and doubling on the 7th looks good on general principles. Black has to go to extremes to avoid giving back the queen and Bg7 for two rooks, a losing endgame. |
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| Jul-25-20 | | drollere: this is a very pretty "whole board" combination. every move increases white's pressure and reduces black's options. 34. .. Qa2 seems like flailing to me. Qh8 to make way for the R seems at least to be trying. it's interesting that the black QB has absolutely no effect no matter where on the board you might be allowed to put it. |
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| Jul-25-20 | | Walter Glattke: Black is one pawn ahead and threatens BxQb5. Possible were Qc6 or Qd5. White play queen sac with 31.Qxd7. Now 31.-Rxd7 32.Rxd7 Rd8!? white then plays on mate point g7 with Nxe5 and R1c7. Kh8? Nf7+. 33.Re7 Rxd6 34.Bd6 Kh8 35.Nxe5 Qh7 36.R1c7 white wins with that continuation. |
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| Jul-25-20 | | Walter Glattke: After 36.Ne8 could follow 36.-Qa1+ 37.Kh2 Qxe5 38.Rxe5 Rxe8 39.Rxe8 h5 40.Rf8 Kh6 with hopeless position. |
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| Jul-25-20 | | sudoplatov: Stockfish prefers Qb1 or Qb2 or Qa4 to Qxd7. (I didn't get Qxd7 either; I couldn't solve this one.)
After 31.Qxd7 Rxd7 32.Rd7, Stockfish prefers to defend with 32...Rb8 and if 33.Rcc7, then 33...Bb5 perhaps followed by 34.Rxg7+ Qxg7, 35.Rxg7+ Kxg7 where White has about a Pawn advantage (2 Knights vs 1 Rook) but Black has the a-Pawn. The point of Bb5 is to stop Nxe5 while there are still Rooks on the board. |
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| Jul-25-20 | | Brenin: I got it, after a few minutes thought, though after 32 ... Rd8 I planned 33 Ra7, hitting the B on a6, rather than Re7; I think it also works, e.g. 33 ... Ra8 34 Re7. Black's 33 ... Be2 was pointless: Qa2 or Qb3 would have given better chances, though the game was probably lost by then. |
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| Jul-25-20 | | Walter Glattke: Tal plays Qxd7 here, but Botwinnik style was Qc6, I think, that will win for white, too. Combination play or position play. 31.Qc6 Qe6 32.Nd2 Kh8 33.f3 h5 34.Nb3 Be2 35.Kf2 Bd3 36.Qb6 Nxa5 - why not here? |
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| Jul-25-20 | | Brenin: <Walter Glattke>: In your 'Botvinnik' line, 34 Nb3 allows 34 ... Qxb3 35 Rxd7 Rxd7 36 Qxd7 (36 Qxa8+ Kh7 37 Qxa6 Qxa3 is no better) Qxa3 37 Rc7 Rg8, and White has nothing better than the draw by 38 Nf7+ Kh7 39 Ng5+ Kh8. How about Nb1-c3-d5 instead? It's slow, but what can Black do to free himself? |
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| Jul-25-20 | | agb2002: White has a bishop and a knight for the bishop pair and a pawn. Black threatens Bxb5.
White can recover the pawn with 31.Qxa5 but after 31... Be2 32.Qc3 Bxf3 33.Qxf3 the pressure on Black's position seems to have diminished somewhat. That threat and the possibility of doubling rooks on the seventh rank lead to ponder over 31.Qxd7 Rxd7 32.Rxd7: A) 32... Kh8 33.Rcc7
A.1) 33... Bf6 34.Nf7+ Kg7 35.N7g5+ Kh8 36.Rh7+ Qxh7 37.Rxh7+ Kg8 38.Rxh6 + - [2N vs b]. A.2) 33... Bf8 34.Nf7+ Kg7 35.N7g5+ Kf6 (35... Kh8 36.Rh7+ as above) 36.Nh7+ wins decisive material (36... Kxe6 37.Re7+ Bxe7 38.Rxe7#). B) 32... Qe6 33.Rcc7 Rg8 34.Nf7 (threatens Nfg5+) 34... Qb3 35.Bf8 Rxf8 (35... Bxf8 36.Nfg5+ Kh8 37.Rh7#) 36.Nfg5+ B.1) 36... hxg5 37.Rxg7+ Kh8 (37... Kh6 38.Rh7#) 38.Rh7+ Kg8 39.Rcg7#. B.2) 36... Kg8 37.Rxg7+ Kh8 38.Rh7+ Kg8 39.Rcg7#. B.3) 36... Kh8 37.Rxg7, with the double threat Rh7+ and mate next, and Nh4-Nxg6+, looks winning. C) 32... Bc8 33.Re7 followed by 34.Rcc7 as above. |
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| Jul-25-20 | | RandomVisitor: 31.Qxd7 works...
click for larger viewLc0_0.26.1_384x30-t60-4485.pb:
<15/40 57:03> 2,534k 740 <+4.07 31...Rxd7 32.Rxd7 Rd8 33.Re7> Qa2 34.Rcc7 Qxa3 35.Rxg7+ Kh8 36.Rh7+ Kg8 37.Rcg7+ Kf8 38.Nf5 Rd1+ 39.Kh2 gxf5 40.Nh4 Ke8 41.Ng6 Qf8 42.Nxf8 Kxf8 43.Ra7 Kg8 44.Rhc7 Rd8 45.Rxa6 fxe4 46.Raa7 e3 47.fxe3 fxe3 48.Kg3 |
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| Jul-25-20 | | RandomVisitor: ... 31.Qa4 also works.
click for larger viewLc0_0.26.1_384x30-t60-4485.pb:
<15/37 1:12:18> 3,581k 825 <+3.67 31.Qa4 Qe6 32.Kh2 Nb6 33.Qxa5> Nd7 34.Qe1 Qb3 35.Bb4 Kg8 36.Qd2 Qe6 37.R1c6 Nb8 38.Rb6 Rd7 39.Rc5 Kh7 40.Bc3 Be2 41.Nxe5 Ra2 42.Qd5 Qxd5 43.exd5 Bxe5 44.Bxe5 Re7 45.Rxb8 g5 |
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| Jul-25-20 | | thegoodanarchist: Once again, I calculated the tactical line correctly, but misjudged the strength of white's resulting position. Since it didn't "look" winning to me in my mind's eye, I rejected it. Positional evaluation - how does a person go about improving in that area? |
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| Jul-25-20 | | Cheapo by the Dozen: Easiest Saturday puzzle in a while, and I managed to miss it anyway. :( For some reason, I thought it would be a good idea to play 33 R(c)c7 and allow Black to exchange a pair of rooks. |
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| Jul-25-20 | | Hercdon: After white’s 32nd move 6-second Stockfish thinks Black has a better idea and I quote: “ +0.87 (21 ply) 32...Rb8 33.Rcc7 Kh8 34.Nf7+ Kh7 35.N7xe5 Rd8 36.Re7 Re8 37.Rxg7+ Qxg7 38.Rxg7+ Kxg7 39.Bb2 g5 40.Ng4+ Kf8 41.Nxh6 Rxe4 42.Ng4 a4 43.Nxg5 Re1+ 44.Kh2 Re2 45.Bc3 Ke7 46.Bb4+ Kd7 47.Nf7 Ke6”. UnderStanding the limitations of this analysis Could it be that white’s surprise sacrifice and resulting unbalanced position were factors in causing black to make a series of bad moves? |
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| Jul-25-20 | | Walter Glattke: BRENIN: 38.Ne8, not Nf7+, 38.-Qc1+ 39.Kh2 Qf1! draw, but you misunderstand the idea of pressing to no sensful move (paralysis). Maybe 34.N2c4 threatens Nxa5 Nab7 or others, white can make his position always stronger, but black has no movement at least. |
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| Jul-25-20 | | Walter Glattke: Ah, Brenin had another idea for the knight, he agrees to press black to frozen position, that is good, thanks, Nb1 one good idea. |
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| Jul-25-20 | | saturn2: After 31.Qxd7 Rxd732.Rxd7 I reckoned white gets also the bishop on g7 and that black can exchange his queen for two white rooks, but this does not turn the white advantage. |
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| Jul-25-20 | | King.Arthur.Brazil: I'm happy because I found the whole combination. After, 36.♘e8, even ♖xe8 leads to checkmate after 37.♖xg7+ ♔h8 38.♘xg6#.
<Glattke: the desesparate 36...♕a1+ 37. ♔h2 ♕xe5 38. ♖xe5 ♔h8> 39. ♘xg7 ♖xg7 40. ♖e8+ ♖g8 41. ♗b2#. For 36...♕xa3 or similar moves, the checkmate come by: 37. ♘f6+ ♔h8 38. ♘xg6#. <Following Drollere words, after: 34...♕h8 35. ♖cc7 ♖g8>, the move 36.♘e8 doesn't work anymore, because of 36...♖xe8. However, white still wins with 36.♘df7 ♗xe5 37. ♘xh8+ ♔xh8 38. ♖h7# Black can resist with ♗g7 38. ♗b2 ♔xh8 39. ♖xg7 ♖xg7 40. ♖xg7....
Other possibility is 36.♘ef7 ♗f6 37. ♘xh8+ ♗xe7 38. ♖xe7+ (if ♔xh8 then 39. ♗b2+ ♖g7 40. ♖xg7 ♗c4 just to delay the mate ♘f7#) 38...♖g7 39.♘hf7 a4 40. ♗b2 ♖g8 41.♘g5 or 39...♔g8 40. ♖e8+ ♔h7 ♖h8# or even 39...a4(any) 40. ♘e8 ♗c4 41.♘f6#. No escape! |
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Jul-25-20
 | | Knighthawkmiller: Comment from 2008, Helloween: <LaFreak>34.Bb2 1-0
If Black plays in response 34 ... RxN(d6), then after pieces are exchanged, black has an outside passed pawn. |
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| Jul-25-20 | | landshark: I thought about it a bit and decided to follow the game line - envisioned it as played thru Move 33 and realized W has unopposed "pigs" on the 7th and should be winning -
I'll call this a rare Saturday puzzle solved (: |
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| Jul-25-20 | | Walter Glattke: King Arthur, perpetual after 36.-Qa1+ 37.Kh2 Qe1! 38.Nxg7 Qg3+ 39.Kg1 Qe1+, my mistake "Qf1", I meant Qe1. |
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| Jul-25-20 | | Walter Glattke: Ah, meant the final match 36.Ne8 |
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| Jul-25-20 | | TheaN: I'm not sure what would be required to 'solve' this one. I definitely looked at <31.Qxd7 Rxd7 32.Rxd7> immediately, with the ideas that if Black attacks the rook just move it aside and double up on the seventh. There are some subtleties, as I missed the Be2 idea for Black: after 34.Rcc7?! Bxf3 35.Rxg7+? (gxf3 is a small plus to White) Qxg7 36.Rxg7+ Kxg7 37.gxf3= the a-pawn's a problem. But White's 34.Nxe5 +- simply activates the only piece that wasn't doing anything and White plays Rcc7 anyway. This is not really a tough sequence to spot. |
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Kibitzing
sac: 31.Qxd7