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May-26-16 | | stst: It's a race game, see who delivers mate first.
White got the pistol in hand, and, fire!! (of course, to get some excitement!!)
36.Rxg7 (R-sac, like Mondays) KxR (hard to reject the sac, for then another Rc7 would be insurmountable!!)
37.Rc7+ Now Black can intercept with Qf7, then of course RxQ and Black is Q-less!!or, 37......Kg8
38.Qh6 (mate next) Black still can Qf7, and RxQ, KxR would prolong the game..
but also possible 38.....Qa1/b1+
39.Nc1 supported by R@c7, Rxd4 (but too late)
40.Qg7#
seems that's it. |
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May-26-16 | | stst: Indeed, as said, Qf7 intercept, but I have no appetite to further analyze a Q-less game ending.... good that it ended soon after RxQ, KxR etc. |
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May-26-16 | | agb2002: White has a knight for a bishop.
Black threatens Qxb2, Qxe2+ and Rxd4.
The first idea that comes to mind is 36.Rxg7+ Kxg7 (36... Kh8 37.Qh6#; 36... Kf8 37.Qh6 and mate in three) 37.Rc7+: A) 37... Kf(h)8 38.Qh6+ Kg8 39.Qg7#.
B) 37... Kg8 38.Qh6 wins (38... Qc1+ 39.Nc1).
C) 37... Re7 38.Rxe7+
C.1) 38... Kf8 39.Rc7 looks winning. For example, 39... Ke8 40.Qh6 Qg8 (40... Rd7 41.Qh7+ Ke7 42.Qg7+ Qf7 43.Rxd7+ wins) 41.Rg7 wins the queen for the rook or mates. C.2) 38... Kg8 39.Qh6 Qc1+ 40.Nc1 wins.
D) 37... Qf7 38.Rxf7+ Kxf7 39.Qb3+ followed by Qb6 touching many weak spots (a5, b7, f6, g6), defending the d-pawn and threatening Nf4, looks very good for White in spite of the balanced material. ------
Another option is 36.Nc1 but Black seems to hold after 36... Qe6 (36... Qxb2 37.Rxg7+ looks similar to the above lines) and threatens Qh3. ------
I'd play 36.Rxg7+. |
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May-26-16 | | patzer2: Prior to looking at today's Thursday problem, I had just viewed a video lecture by Jeremy Silman where he discussed the importance of recognizing patterns ripe for a tactical resolution, rather than relying solely on your ability to calculate long variations to a decisive result. In a previous lecture, he mentioned that combinations are the result of undefended pieces, under defended pieces or a weak King position. With that in mind, the clearance sacrifice 36. Rxg7+ Kxg7 37. Rc7+ jumped out to me as a familiar pattern to consider for exploiting Black's weakened King position. Sure enough the combination works, as in the final position it's mate-in-two after 41...Kf5 42. Qxg6+ Kxf4 43.
Qg5#.
Black can put up a bit more resistance with 40...Kf8, avoiding the mate-in-three after 40...Ke6 41. Nf4+ Kf5 42. Qxg6+ Kxf4 43. Qg5#. However, after 40...Kf8 41. Nf4 Black's position is equally hopeless as he has nothing better than giving up decisive material with 41...Rxe5 42. Nxg6+ (#14, Deep Fritz 15). For a Black improvement, the Fritz suggestion 11...Nh5 = looks good. Earlier, in the opening, I like the alternative 8...b6 9. cxd5 cxd5 = (0.13 @ 40 depth, Stockfish 6) as in Shabalov vs M Gurevich, 2008. |
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May-26-16
 | | al wazir: I didn't see 41. Nf4+, the clincher, ahead of time, but I think I would have found it OTB, or won with another move, e.g., Qxg6+. |
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May-26-16 | | Robespierre: As an "advanced beginner" I believe that I've gotten 2 or 3 Weds puzzles in the past 4-5 years. This was the 3d or 4th puzzle I've solved in under 3 minutes. I'm either improving or this Weds puzzle was easier than most Weds puzzles. |
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May-26-16 | | saturn2: After the rook sacrifice I calculated until 40...Kf8 and concluded white is better but has still to fight. |
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May-26-16 | | gofer: The start is simple...
<36 Rxg7+ Kxg7>
<37 Rc7+ ...>
37 ... Rg8
38 Qh6 Qf7
39 Rxf7 Kxf7
40 Qh7+ Kf8 (Ke6 41 Nf4+ Kf5 42 Qxg6+ Kxf4 43 Qg5#)
41 Nf4!
 click for larger view<37 ... Qf7>
<38 Rxf7+ Kxf7>
 click for larger viewWe have two good options; 39 Qb3+ and 39 Qf4+, but I think the latter gives much
more than the former as it has the potential to start our central pawns storming to promotion... <39 Qf4+ Kg8>
<40 Qf6 ...>
 click for larger viewI would say this is winning for white as Pg6 is going and then the pawns are going to start marching,
playing Bxe2 loses quickly due to the number of checks available to the white queen, so black must hold
on to its bishop... ...but doing so still doesn't show any obvious attacking lines for the rooks
as Ne2 controls c1!
~~~
Hmmm, so not a done deal (as the game line), but still a win... |
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May-26-16
 | | Richard Taylor: It's always quite easy when there are forcing checks. Black should have been more alert to the fairly obvious threats to his King. |
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May-26-16
 | | Richard Taylor: Gyorgy Szilagyi played well. Poor old Robatsch had a rather unhappy end, in this game and in his life. Stomach and lung cancer. What a bastard. And people believe in a benign God....Perhaps he smoked a lot. But his name is associated with the Modern Opening which Botvinnik played a lot. I've only played it a few times but I might study Bott's games and try it. |
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May-26-16
 | | Richard Taylor: Gyorgy Szilagyi played well. Poor old Robatsch had a rather unhappy end, in this game and in his life. Stomach and lung cancer. What a bastard. And people believe in a benign God....Perhaps he smoked a lot. But his name is associated with the Modern Opening which Botvinnik played a lot. I've only played it a few times but I might study Bott's games and try it. |
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May-26-16 | | mel gibson: Black blundered on the previous move & should have played:
35...Q-e6.
It then leads to a draw. |
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May-26-16 | | wooden nickel: Although inferior to the text move, 36.Qg5 looked very natural; if 36... Qxb2?, and now the Rook sac
37.Rxg7+ Kxg7 38.Rc7+ Kg8 39.Qxg6+. If 36... Qe6 then just grabs a pawn with 37.Rxb7. |
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May-26-16 | | jffun1958: The finish is a forced 3-mate:
41. ... Kf5 42. Qxg6+ Kxf4 43. Qg5# |
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May-26-16
 | | Jimfromprovidence: FWIW, black has a swindle attempt after 40...Kf8 41 Nf4 Rxe5.  click for larger view |
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May-26-16 | | mjmorri: Nice spot Jim. |
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May-26-16 | | eblunt: <Jimfromprovidence:> Yes, but it's real desperation stuff, as 42 Qh8+ wins immediately. |
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May-26-16 | | YouRang: Not too hard considering that (1) white hardly has any other offensive moves other than 36.Rxg7+, and (2) further attack with Qh6 becomes alive once Pg7 is gone. However, it always feels a bit like cheating to be given the foreknowledge that some nice tactic is there waiting to be found. So, I'm not sure I'd find it if I came across this position in a real game. In a real game, it's extra impressive to not only find this tactic, but further calculate that it really works even after the king runs up the board or if the queen gives check. It's tempting to just play the short-range tactic and assume that exposing the king will lead to a win that you can figure out later. But it's a gamble that doesn't always work (and if it doesn't work after you've sacrificed a rook, you might lose). |
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May-26-16 | | saturn2: <eblunt: <Jimfromprovidence:> Yes, but it's real desperation stuff, as 42 Qh8+ wins immediately.> 42 Ng6 forks tje rook too. |
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May-26-16 | | CHESSTTCAMPS: Material is roughly even, but white has strong connected passed pawns, rooks coordinated in a battery, and a rook on the 7th posing an immediate threat to the black king. The obvious forcing sequence on the board is 36.Rxg7+! Kxg7 (Kf8 37.Qh6 Qa1/b1+ 38.Rc1 wins immediately) 37.Rc7+ and now: A. 37... Kf8/h8 38.Qh6+ Kg8 39.Qg7#
B. 37... Kg8 38.Qh6 Qf7 (Qa1/b1+ 39.Nc1 wins) 39.Rxf7 Kxf7 40.Qh7+ Kf8 41.Nf4 and the threat of Nxg6+ is decisive. B.1 40... Ke6 41.Nf4+! Kf5 42.Qxg6+! Kxf4 43.Qg5#)
C. 37... Qf7 38.Rxf7+ Kxf7 39.Qf4+ Ke7 40.Qf6+ Kd7 41.d5 Rf8 42.Qe6+ Kc7 43.Nd4 Rfe8 44.d6+ Kb8 45.Qd5 followed by e6 will promote a pawn shortly. C.1 39... Kg8 40.Qf6 Kh7 (Bxe2 41.Kxe2 Rxd4 42.Qxg6+ Kf8 43.e6 Ke7 44.Qf7+ Kd8 45.Qf6+ picks up a rook) 41.Nf4 Rg8 42.e6 Rdf8 43.Qe5 Rf5 44.Qc7+ Rg7 45.e7 and the pawn can't be stopped. Time for review... |
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May-26-16 | | morfishine: <YouRang> Exactly, its an "only" position/puzzle ***** |
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May-26-16 | | vajeer: How about 37...Re7
38. Rxe7 Kf8 and black should be able to put up some fight. |
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May-26-16 | | stingray0104: <How about 37...Re7
38. Rxe7 Kf8 and black should be able to put up some fight.>Yes, but white maintains a rook on the seventh rank with something like 39. Rxb7 and the black king becomes a sitting duck for the white queen which will quickly become active. |
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May-27-16
 | | An Englishman: Good Evening: <eblunt>, 42.Nxg6+,Ke8; 43.Nxe5,Rxd4; 44.Nxf3 might also work. |
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May-27-16
 | | gawain: I solved this, sort of. I did not visualize it all the way to the end, but there is really only one combination for White to try. I hope I would have dared to try it over the board and eventually found 41 Nf4. |
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