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| Aug-06-14 | | morfishine: <40.Qxg7+> was the first place I looked Any GM would play this under normalcircumstances, so he must've been under
sever time trouble, as noted.
***** |
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| Aug-06-14 | | zb2cr: I found this one, but it took me so long I can't even write it up, or I will be late to work! |
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| Aug-06-14 | | Refused: <morfishine: <40.Qxg7+> was the first place I looked
Any GM would play this under normalcircumstances, so he must've been under sever time trouble, as noted. *****>
Qxg7 is not the key though.
You have to see the Rook sacrifice or that more complicated line following the underpromotion gofer gave.
Adding that it was the 40th move your guess that Zeitnot was a factor does not look too far fetched. |
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Aug-06-14
 | | perfidious: <morf> was not guessing--he read my kibitz of 2011. |
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Aug-06-14
 | | FSR: To put together what <Phony Benoni> and <M.Hassan> said - after 42.Rg7+! Kf6, White has a choice of wins: the prosaic 43.Rh6+ Kxg7 44.h8(Q)+ and the poetic 43.h8(Q) Qxf3+ 44.Rg3 discovered check. |
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| Aug-06-14 | | Mating Net: All in all, a poor position for POTD as the strongest move was not played. |
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| Aug-06-14 | | Herma48852: Handled this line:
40. ♕xg7+ ♔xg7 41. gxh7+ ♔f6 42. h8=♕+
with mate to follow but missed the trickier line with
41. .. ♔f7 |
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Aug-06-14
 | | Phony Benoni: <Mating Net> Oh, it's a perfect POTD. How often do we get look smarter than Gheorghiu? |
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Aug-06-14
 | | Penguincw: No wonder why this puzzle was so hard. ;) |
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| Aug-06-14 | | Mating Net: <How often do we get look smarter than Gheorghiu?> Never before in my case <Phony Benoni> and most likely never, period. |
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| Aug-06-14 | | Eduardo Leon: I cannot believe an opportunity like this was missed. Gheorghiu must have had just a few seconds left in his clock. <40.♕xg7+ ♔xg7 41.gxh7+ ♔f7> This much is outright obvious.
<42.♖g7+!>
The key move. Black cannot decline the sacrifice: Moving the king to the 6th rank is met with 43.♖h6+. Moving the king to the 8th rank is met with 43.h8=♕#. <42...♔xg7 43.h8=♕+ ♔f7 44.♖h7+ ♔e6 45 ♖h6+> And white wins the queen. |
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| Aug-06-14 | | stingray0104: The first line I considered was actually
40. ♕xg7+ ♔xg7 41. gxh7+ ♔f7 42. h8=♘+
since of course, I couldn't resist an underpromotion! Interestingly enough, I believe white does come out ahead in material as the black queen is inevitably lost. For example, 42. ... ♔f8 43. ♘g6+ ♔e8 44. ♖h8+
click for larger viewand black loses the queen to a knight fork on e5. Another line could be 42. ... ♔e8 43. ♖g8+ ♔d7 44. ♖h7+ ♔d6 45. ♖h6+
click for larger viewHowever, at that point white's loose pawns and passive pieces makes the win much harder than if we had just played 42. ♖g7+ which wins the black queen anyways and also allows for a queen promotion. |
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| Aug-06-14 | | kevin86: Funny, I was looking for the queen sac- surprised the master missed it. |
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| Aug-06-14 | | kevin86: x-razed: white will lose the rook! |
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| Aug-06-14 | | MarkFinan: That's hard! I've never seen a Wednesday this difficult. I thought of the queen sac but that's only because I was looking for a win for white. I've no idea. I hope that helps, lol ✌ |
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| Aug-06-14 | | Marmot PFL: In time trouble white probably saw 40.Qxg7+ Kxg7 41.gh7+ Kf7 42.h8(Q) Qxf3+ so instead made a move to defend f3. Polugaevsky needed this win to qualify for the candidates and a match with Anatoly Karpov. |
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| Aug-06-14 | | BOSTER: I'd like to play in Marshall's style
40.Qxh7+ Rxh7 41.g7+ Kg8 , but I didn't find the bishop to play 42.Bxh7+ |
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| Aug-06-14 | | rozzatu: I have tried Qxh7. But it doesn't work. |
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| Aug-06-14 | | JG27Pyth: @<eduardo leon> 42.Rg7+!! Thanks for that didn't see it. Quite a Wednesday indeed. |
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| Aug-06-14 | | MiCrooks: The Queen sac is a no-brainer try when handed this as a puzzle (and really when looking OTB as well I agree with the time trouble angle and it must have been severe). The only line that takes any thought at all is Kf7 where the promotion of the pawn is not with check. This makes Rg7+ pretty obvious as well as you know you will at least win the Queen for the Rook if you promote to a Queen with check, and if you think about it a bit you can win the Queen outright i.e. after checking on h6 with the Rook you check on g7 with the Queen and win the Queen on the following move free and clear (or mate with Rh8++ if the King doesn't go to c8). This seems like perfect Wednesday material to me...an obvious try with a tiny twist two moves in. |
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| Aug-06-14 | | morfishine: <perfidious> I was pleased to play the line the GM missed. After first posting, then reading your post, it all made sense. Funny thing is I returned the compliment when I didn't visually play the best in my original line for Black, and then missed the best for White! What-with all these inaccuracies, I just posted <40.Qxg7+> FWIW: I had 40.Qxg7+ Kxg7 41.gxh7+ Kf6 42.Rh6+ when White wins, but taking longer ***** |
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| Aug-07-14 | | autom: Looking for a reason black should win, I found this combination: 33...Qe1+ 34.Kh2 Qxg3+ 35.Kxg3 Rxg6+ 36.Qxg6 hxg6 and eventually winning a pawn and probably the game. |
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Aug-07-14
 | | Check It Out: Nice puzzle today! |
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Aug-08-14
| | FSR: Polugaevsky wrote of this game on page 115 of his book <Grandmaster Preparation>: <In the opening the Rumanian grandmaster employed a comparatively new continuation in the Sicilian Defence. At the board I managed to see my way through the peculiarities of the resulting position, eliminated the one defect in my position - a backward pawn - and obtained first the better chances, and then a decisive advantage. But the last few moves [before the adjournment] were made in a fearful time scramble, and just before the time control Gheorghiu and I 'exchanged' terrible blunders. After an error by me on the 39th move, Gheorghiu could have won instantly, but his reply was equally hasty.> 41.Rxe5 was Gheorghiu's sealed move. 41...Qf1+ 42.Kg4 Rd8!! was discovered by Polugaevsky during the adjournment. He and his team analyzed it to a win in all lines except one, which Gheorghiu understandably was not able to find at the board. Id. at 115-16. |
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| Sep-06-20 | | Straclonoor: Polugaevsky wrote in his book that his team analysed this game 15 (!) hours and can't find win after 43.Kg5 with <43....Qg1+ 44.Rg4 Qc1>
Also he wrote (in 1977) that computer couldn't find this move for save the game. Yes, it can't find this move because it goes to lose
after 43...Qg1 44.Rg4 <Qb6>!! 43. Kg5 Qg1+ 44.Rg4 Qb6 45. Rf5 Rxg6+ 46. Kxf4 Rh6 47. Qg5 Qd6+ 48. Re5 Qd2+ 49. Ke4 Qe1+ 50. Kf4 Rf8+ 51. Rf5 Qd2+ 52. Ke4 Re6+ 53. Re5 Qc2+ 54. Kd5 Rg6 55. Qe7 Qd1+ 56. Rd4 Qxf3+ 57. Rde4 Rc8 58. Rg5 Qd1+ 59. Rd4 Qb3+ 60. c4 Rc5+ 61. Kxc5 Qb4+ 62. Kd5 Qxe7 63. Rxg6 hxg6 64. c5 Qd7+ 65. Ke5 Qc6 66. Rc4 Kg8 67. Kd4 Kf8 68. Rc1 Qf6+ 69. Kd3 Qf5+ 70. Kc3 Qxc5+ 71. Kb2 Qb4+ 72. Ka2 Qxa4+ 73. Kb2 Qd4+ 74. Kc2 eval -4,75,Stockfish 040920 Only <43.Rg5>! holds the draw Analysis by Stockfish 040920:
= (0.00): 43.Rg5 Rc8 44.Kxf4 Rxc3 45.Kg3 Rc2 46.Re4 Rg2+ 47.Kf4 Qc1+ 48.Re3 Re2 49.Rge5 Rxe3 50.Rxe3 Re7 51.g7+ Kg8 52.Qd5+ Rf7+ 53.Ke4 Qc2+ 54.Rd3 Qxa4+ 55.Ke3 Qf4+ 56.Kf2 Kxg7 57.Qxa5 Rc7 58.Qd5 Qh2+ 59.Kf1 Rc1+ 60.Rd1 Qh1+ 61.Ke2 Qxd1+ 62.Qxd1 Rxd1 63.Kxd1 Kf7 64.Ke1 Kf6 65.Ke2 h5 66.Kf2 h4 67.Kg2 Ke5 68.Kh2 Kf5 69.Kh3 Kg5 70.f4+ Kxf4 71.Kxh4 Kf5 72.Kg3 Kg5 73.Kh3 Kh5 74.Kg3 |
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