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May-29-16
 | | Penguincw: Ugh, Sunday puzzles.
But this one, I almost got. I tried 23.Qd7+ Kb8 24.Ne6, but 24...Qxc2 saves the day. But hey, at least white isn't losing in this variation. |
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| May-29-16 | | centralfiles: 23.Ne6 Qb6. 24.c4 Bd4! Might be the answer
25.Bxg6 is met with ...Bxf2+
To take credit for today's puzzle you must have found Bg8 and how it wins, and 24...Bd4! In answer to 23.Ne6 |
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| May-29-16 | | QueentakesKing: Insane? Overstatement. |
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| May-29-16 | | RandomVisitor: 23.Bg8 Qb6 24.Nxh7 and now... |
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| May-29-16 | | dnp: I looked at B-e6+, and then................. |
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| May-29-16 | | Aleman: Who knows. But the most attacking first two moves look like Qd7 check followed by Ne6. Which leads to some back row checkmate possibilities. |
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| May-29-16 | | gofer: Yesterday, I found <31 Rg1 ...>, but was left wandering through the mists
as far as a overall outcome. Today, is a different kettle of fish. <23 Bg8!! ...>
Is this really worth two exclamation marks? Probably not, but I imagine
it came as a bit of a shock to Pytel. The bishop is immune due to
Qc4+ winning the tempo and mating soon after. So now black has lost
control of its back rank! There seems to be only one defence worth
mentioning and this loses two pawns, so its game over... 23 ... Rxg8
24 Qc4+ Kb8
25 Qxg8+ Kc7
26 Qd8+ Kc6
27 Ne6 
23 ... e5/e6?
24 Qd7+ Kb8
25 Qd6+ Ka8 (Kc8 Be6#)
26 Qd8+ Bxd8
27 Rxd8#
<23 ... Qb6>
<24 Nxh7 ...>
24 ... Rxg8
25 Qc4+
24 ... Rxh7
25 Bxh7 Bxh7
26 Qd7+ Kb8
27 Qe8+ Kc7
28 Rd7+ Kc6
29 Qc8+ Kb5
30 Rxb7
24 ... Bxh7
25 Qd7+ Kb8
26 Qe8+ Kc7
27 Rd7+ Kc6
28 Rd5+ Kc7
29 Qd8#
I imagine black can escape somehow and only lose a few pawns, but
it would be horrible from then on...
~~~
Wow, Kasparov missed Bg8! |
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| May-29-16 | | jith1207: Yeah, he missed it. BUT, Let's not pretend: He's no Kasparov. |
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| May-29-16 | | The Kings Domain: Missed this by a hair's breadth. Thought of 23) Qd7 at once. Nice and challenging puzzle. |
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| May-29-16 | | thegoodanarchist: No wonder it was a draw - wrong Kasparov |
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| May-29-16 | | schachfuchs: hehe, there's only one real Kasparov!
But anyway, is there no better continuation after 23.Bg8! Qb6 than 24.Nxh7? |
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| May-29-16 | | YouRang: I thought maybe I had something with 23.Be6+ Kb8 24.Bxf5 winning a pawn, because if black takes the "hanging" knight with 24...Bxg5, then I strike back with the 25.Qg3+ fork. I did suspect that it wasn't flashy enough to qualify for Sunday. Then I turned on the engine and was surprised to see 23.Rg8!, which even Kasparov missed. This sets up an even better fork (23...Rxg8? 24.Qc4+!). More importantly, it blocks the rooks defense of the back rank. That has to be good. |
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| May-29-16 | | YouRang: Heh, wrong Kasparov. I bet Garry is really annoyed by Sergey, because people will attribute Sergey's sub-par play to him! Or maybe Sergey is really annoyed by Garry, since refer to him as "not the real Kasparov". ~~~~
Looking more at the <23.Kg8!> line possibilities: <23...Qb6> guards d8 <24.Nxh7> take P and attack DSB <24...Qc7> potential threat on h2 <25.Nxf6 exf6 26.Be6+ Kb8 27.h3> defend against h2 and back rank attack <27...Bh5> assuming black wants to minimize exchanges (especially the queens) <28.Re1 Re8 29.Qxf5> win another P, attack LSB <29...Bf7> double attack pinned B <30.Re3> unpins <30..Rd8> threaten Rd1~# <31.g3 Be8 32.Qxf6> now down 3 pawns, black ought to resign.
click for larger view |
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| May-29-16 | | RandomVisitor: 23.Bg8 Qb6 24.Nxh7 and now...
click for larger viewKomodo-9.42-64bit:
+2.38/39 24...Qc7 25.Nxf6 exf6 26.Be6+ Kb8 27.h3 Qe5 28.Qd6+ Qxd6 29.Rxd6 Kc7 30.Rd7+ Kb6 31.Rg7 Rh6 32.Bd5 f4 33.c3 Bd3 34.Rxb7+ Kc5 35.Bf3 a5 36.Rc7+ Kb5 37.Rc6 a4 38.Rc8 f5 39.a3 Rh7 40.Bd5 Be4 41.c4+ Ka5 42.Rc5+ Ka6 43.Kh2 Bxd5 44.Rxd5 Rc7 45.c5 f3 46.Rxf5 fxg2 47.Kxg2 Rh7 48.Kg3 Kb5 49.h4 Rd7 50.h5 Rd3+ 51.Kg4 Rxa3 52.h6 Rc3 53.h7 +2.54/39 24...Qd4 25.Nxf6 Qxd3 26.Be6+ Kb8 27.Nd7+ Qxd7 28.Rxd7 f4 29.Bd5 Rh5 30.Rxb7+ Kc8 31.Rb5 Kd8 32.c4 Re5 33.h4 Re1+ 34.Kh2 Re2 35.Rb8+ Kc7 36.Rb7+ Kd6 37.Rxa7 Bf5 38.Bf3 Rc2 39.h5 Rxc4 40.a4 e5 41.h6 e4 42.Be2 Rc2 43.g4 Rxe2 44.Ra6+ Ke5 45.Ra5+ Kf6 46.Rxf5+ Kg6 47.Rxf4 Kxh6 48.Kg3 Kg6 49.a5 Kg7 50.Rf5 Ra2 51.Kf4 Ra4 52.Ke3 Ra2 53.Rd5 Kf6 +5.08/39 24...Bh5 25.Nxf6 exf6 26.g4 Be8 27.Be6+ Kb8 28.Qd8+ Qxd8 29.Rxd8+ Kc7 30.Rc8+ Kd6 31.Bxf5 Rg8 32.f4 Rh8 33.h4 Ke7 34.h5 Rh6 35.Rc7+ Kd6 36.Rxb7 Bxh5 37.Rd7+ Kc6 38.gxh5 Rxh5 39.Be6 Rh4 40.f5 a5 41.Rf7 Rh6 42.Kg2 a4 43.c3 Kb6 44.Rf8 Ka5 45.Ra8+ Kb5 46.Rb8+ Ka5 47.Rf8 Kb5 48.Kg3 Kb6 49.Bd7 a3 50.Be6 Kc5 51.Ra8 Rh1 52.Rxa3 Rc1 53.Kg4 Rg1+ 54.Kf3 Rf1+ 55.Ke2 |
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| May-29-16 | | patzer2: Today's Sunday puzzle (23. ?) solution is a winning shot missed in the actual game. The overlooked best move (23. ?) is the brilliant obstruction and poisoned piece offer 23.Bg8!! which forces the reply 23...Qb6 (not 23...Rxg8?? 24. Qc4+ Qc6 25. Qxg8 ) and leaves White with the winning continuation 24.Nxh7! (diagram below):
click for larger viewHere (diagram above) Black's best reply is either 24...Qc7 or 24...Qd4, with the computers slightly preferring 24...Qc7. (three bad alternatives for Black in the diagram above are 24...Rxh7? 25. Bxh7 Bxh7 26. Qd7+ Kb8 27. Qe8+ Kc7 28. Qd8+ Kc6 29. Qd7+ Kc5 30. Qd5+ Kb4 31. Rb1+ Ka4 32. Rxb6 axb6 33. Qc4+ Ka5 34. a4 e6 35. Qb5#; 24...Rxg8? 25. Qc4+ Qc6 26. Qxg8+ ;
and 24... Bxh7? 25. Qd7+ Kb8 26. Qe8+ Kc7 27. Rd7+ Kc6 28. Rd5+ Kc7 29. Qd8+ Kc6 30.Qd7#) After the computer first choice 24...Qc7 (diagram below) 
click for larger viewthe silicon monsters gives best play as 25. Nxf6 exf6 26. Be6+ Kb8 27. h3 (+2.48 @ 33 depth Stockfish 24081364; diagram below) 
click for larger viewwhen Stockfish indicates play might continue 27...Qe5 28. Qd6+ . Looking for a Black improvement earlier in the game, it appears Black was at a disadvantage after 13...Bg6?! 14. dxc4  (+0.88 @ 23 depth, Stockfish 24081364). Instead, 13...e6 14. dxe6 fxe6 = (-0.24 @ 26 depth Stockfish 24081364) is better for Black. Early in the opening for White, I slightly prefer the computer choice 7. Nc4  as in T Willemze vs S Kasparov, 2012. |
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| May-29-16 | | YouRang: <RandomVisitor> <Komodo-9.42-64bit: +2.38/39 24...Qc7 25.Nxf6 exf6 26.Be6+ Kb8 27.h3 Qe5 28.Qd6+ Qxd6 29.Rxd6 Kc7 30.Rd7+ Kb6 31.Rg7 Rh6 32.Bd5 f4 33.c3 Bd3 34.Rxb7+ Kc5 35.Bf3 a5 36.Rc7+ Kb5 37.Rc6 a4 38.Rc8 f5 39.a3 Rh7 40.Bd5 Be4 41.c4+ Ka5 42.Rc5+ Ka6 43.Kh2 Bxd5 44.Rxd5 Rc7 45.c5 f3 46.Rxf5 fxg2 47.Kxg2 Rh7 48.Kg3 Kb5 49.h4 Rd7 50.h5 Rd3+ 51.Kg4 Rxa3 52.h6 Rc3 53.h7> Yes, my engine wanted to play <27...Qe5> also, but the stated continuation of <28.Qd6+ Qxd6 29.Rxd6> leaves us here:
click for larger view
Black is down a pawn with queens off the board, and saddled with doubled, isolated, and assailable pawns on the f-file. IMO, winning enough for white to prompt a resignation. That's why I opted for black trying to avoid exchanges. Not that it saves black, but I think it's the direction a human would prefer. |
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| May-29-16 | | patzer2: <RV> Thanks for the deep 39-ply Komodo 9.42 analysis of 23.Bg8!! Qb6 24.Nxh7! I didn't see your analysis before I posted, but it's nice to see Stockfish is in agreement with Komodo on the play in this position. |
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| May-29-16 | | Patriot: I looked at 23.Bg8 which is at least temporarily safe since 23...Rxg8 24.Qc4+ and 25.Qxg8+. The problem I had was 23...Qb6 and what to do next. But as some have found, 24.Nxh7. |
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| May-29-16 | | agb2002: White has a bishop and a knight for the bishop pair. Black threatens 23... Bxg5.
The first idea that comes to mind is 23.Ne6, threatening 24.Qd8+ Rxd8 25.Rxd8#, but it is not clear how to continue after 23... Qb6 (23... b5(6) 24.Qd7+ Kb8 25.Qc7+ Ka8 26.Nd8 wins). Another option is 23.Bg8:
A) 23... Rxg8 24.Qc4+ Kb8 25.Qxg8+ Kc7 26.Ne6+ + - [R+N vs 2B] and attack. B) 23... e5(6) 24.Qd7+ Kb8 25.Qd6+ Ka8 (25... Qc8 26.Be6#) 26.Qd8+ Bxd8 27.Rxd8#. C) 23... b5(6) 24.Qd7+ Kb8 25.Bd5 and mate next.
D) 23... Qb6 24.Qc4+ (24.Bxh7 Bxg5 25.Bxg6 Qxg6 - +)
D.1) 24... Kb8 25.Nxh7
D.1.a) 25... Bxh7 26.Bxh7 Rxh7 27.Qg8+ Kc7 28.Qxh7 (or 28.Qd8+ Kc6 29.Qd7 Kc5 30.Qd5+ Kb4 31.Rb1+ and 32.Rxb6 + -) + - [R+P vs B]. D.1.b) 25... Rxh7 26.Bxh7 Bxh7 27.Qf7 traps Black's lsb. D.2) 24... Qc7 25.Ne6 Qxc4 26.Rd8#.
D.3) 24... Qc6 25.Be6+ Kb8 (25... Kc7 26.Qf4+ Kb6 27.Rb1+ looks very bad for Black) 26.Qe2 unclear (26... Bxg5 27.Qe5+ and 28.Qxh8+). I don't know but I think I'd play 23.Bg8. |
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| May-29-16 | | morfishine: Anybody can be a teacher, after the fact
***** |
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| May-29-16 | | agb2002: My 24.Qc4+ in line D loses all the advantage after 24... Kb8 25.Nxh7 Be5 according to Stockfish. The immediate 24.Nxh7 is much stronger when 24... Be5 is met with the truly insane 25.Nf8. Well... |
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| May-29-16 | | King.Arthur.Brazil: I supposed that there's a combination and I didn't see one. Then I follow the game like "guess the move" and I find very easy, and didn't spent much time and I'm not so certain about black resigns. Worst position, but you can change it?! You must be passive waiting what? there's a big threatening, whit ewould expose his king to to promote 'g' pown? Can black capture 'a' pown? Seriously I guess black resings caus th bad position but if black was running to be champion of some torunment and need a half point, he would work more. |
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| May-29-16 | | BxChess: I went for 23. Bg8, which, as some have analysed, appears the best move. Together with Saturday's 31. Rg1 I finished 2/7 for the week. This is known as a hockey stick recovery! |
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| May-29-16 | | rodrigoporto: Where is the insanity? |
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| May-29-16 | | stst: will miss this one badly, time almost up...
Both sides are weak at the back rank....
but guess first thing is to cage the K, with
23.Qd7+ Kb8
there after, a lot of choices:
(A)24.Bb3 to lock the Q
(B)24.Bxg6
(C)24.Ne6
then somehow, g3 to give the White K some breathing room... |
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