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| Jul-14-12 | | Abdel Irada: <Beyen at the moon> White proves the power of advanced passed pawns with 28. ♗xg6!. Black has little choice about accepting this sacrifice, since to decline it either loses a piece or cedes control of the seventh rank. Thus, after 28. ...hxg6, White continues
29. ♖e7+, ♖xe7;
30. dxe7+, ♔xe7;
31. ♖d8!!.
This is the real key to the position, since after the essentially compulsory 31. ...♔xd8, the king interferes with the rook, allowing the pawn to queen after 32. h7, ♗b7; 33. h8=♕  , when White should be able to win by picking off Black's scattered pawns and, eventually, advancing his h-pawn. I have to admit, I spent some time looking for something more conclusive, because this ending isn't entirely trivial, but I see no stronger line. |
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| Jul-14-12 | | Coigach: Wow, I got a Saturday!
After a little musing about whether there are ways of attacking the K with the B, I noticed that the h-pawn is a potential winner. Then I couldn't let go of 28.Re7+ Rxe7 29.de Kxe7 30.Bxg6 hg because 31.Re8 was so appealing. Even though it soon became apparent that Black shouldn't take the B and there is no win. And then it dawned that Black does have to take the B if Bxg6 comes first. Chess is lovely when a combination like this clicks together in the mind! |
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| Jul-14-12 | | rilkefan: The natural 22...Qxd6 was dead equal per stockfish. After 23.Qg7 Re8 24.Bxg6 Re7 25.Qh8+ Kc7 white can't play 26.Bf5 because after ...Bxf5 27.Qxa8 Rg7 he's crushed, so 26.Be4 Qd7 and black's position appears to be impregnable with careful play, while white has to avoid e.g. 27.Rd1 Qg4+ 28.Bg2 Qxg2+, winning. |
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| Jul-14-12 | | Swedish Logician: <xthred: Would 28...Bb7 have stopped White's attack.?> No, 29.Bxf7 Bxd5 30. Bxd5 nets a piece. |
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| Jul-14-12 | | sevenseaman: My OTB move would be <28. cxb5> It looks quite a good repairing move and the game could go; 28.cxb5 Bb7 29.Rdd1 Bf3 30.Rd3 Bg4 31.Bb3 Rff8 32.Re7+ I could really be on my way to a win.
But its a puzzle. The ambiance and my 'h' P propel me into a risky maneuver; 28. Bxg6 hxg6 29. Re7+ Rxe7 30. dxe7 Kxe7 31. Rd8
My R pins the B and K is forced to take, just as the 'h' pawn marches on. Will the Q be enough to carry the day against the R with a B? Besides the point; as said before, I have taken a puzzler's risk. |
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Jul-14-12
 | | scormus: Very difficult. Really? It surely goes 28 Bxg6 hxg6 29 Re7+ Rxe7 30 dxe7+ Kxe7. Now what? If 31 h7 then ... Bf5 so its not that. 31 Re5+? No. What about changing the order of moves 29, 29? No. Gotta find a way of blocking the BR path to h8. Nothing, I'm about to give up ... Ah just a minute, what about 31 Rd8! Yes, thats the key move. Probably 1-0. Yes! |
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Jul-14-12
| | scormus: <sevenseaman: My OTB move would be 28. cxb5>
When I wasnt seeing 31 Rd8! I almost plumped for 28 cxb5, certainly would be my OTB move too. I was pretty sure it would win. <But its a puzzle.>
So it had to be a move with more flair .... |
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Jul-14-12
| | scormus: Interesting to run this on the engine. Rybka gives +3 for cxb5 and +1.9 for Bxg6. I guess it testifies to the psychological power of p2Q promotion that B resigned. Yet with R+B+small change B could have fought on |
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Jul-14-12
 | | Gypsy: Sweet combo. (Could have happened a move earlier.) |
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| Jul-14-12 | | SimonWebbsTiger: this game gave rise to a name -- Tim Krabbe has dubbed the tactic the Beyen theme. (Knew this position from an article by Krabbe devoted to the Beyen theme.) |
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| Jul-14-12 | | agb2002: The material is equal.
Black threatens bxc4, Bb7, f3-f2+, etc.
The advanced pawns on d6 and h6 suggest 28.Bxg6 to start eliminating defenders: A) 28... hxg6 29.Re7+ Rxe7 30.dxe7+ Kxe7 (30... Ke8 31.h7 wins) 31.Rd8 Kxd8 (31... Bb7 32.Rxa8 Bxa8 33.h7 + -) 32.h7 and the new queen will attack the scattered black forces. B) 28... Rf6 29.Be8+ Kd8 30.Bc6 with the double threat 31.Re8#and 31.Bxa8. C) 28... Rf8 29.Re7+ (29.Bxh7 should win also)
C.1) 29... Kc6 30.Rc7+ Kb6 31.Rdxc5 a6 (31... hxg6 32.Rxb5+ Ka6 33.Rc6#) 32.Bxh7 + - [3P]. C.2) 29... Kd8 30.Rxh7 + - [2P] and multiple threats, mainly Rg7-h7-Rg8. |
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| Jul-14-12 | | David2009: R Beyen vs Filip, 1971 White 28? The natural 28.cxb5 is met by 28...Bg7 when the forcing line 29.Bb3?! Bxd5 30.Bxde5 Raf8! 31.Bxf7 Rxf7 32.Re7+? Rxe7 33.dxe7 fails to 33...g5! (but NOT 33...Kxe7? 34.h4!).
Instead White breaks through with 28.Bxg6! and if hxg6 29.Re7+ Rxe7 30.dxe7+ Kxd7 31.Re8 Kxe8 32.h7 Kb7 33.h8=Q+ and the h2 Pawn should win for White. Time to
check:
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The regulars have said it already! Here's the puzzle position
click for larger view
and a link to Crafty End Game Trainer: http://www.chessvideos.tv/endgame-t...
The resilient robot defends against both the cxb5 and Bxg6 variations with its usual determination . Enjoy beating it unaided by silicon - if you can! |
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| Jul-14-12 | | SimonWebbsTiger: <Timman did not think it would have actually happened this way, and this was confirmed in the reaction of a Belgian chess player, Deleyn. Years ago, he had been told by yet another Belgian who had played on the national team in that match, Marc Bonne, that Beyen had indeed not seen Bxg6 himself, and that it had been whispered to him after 27.Bc2 - not by Boey, but by yet another team member: IM Arthur Dunkelblum.> "#71 - A Whispered Move"
http://timkr.home.xs4all.nl/chess2/... |
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Jul-14-12
 | | FSR: I think the solution is the surprising 28.Bxg6!! hxg6 29.Re7+! Rxe7 30.dxe7+ Kxe7 31.Rd8!! Kxd8 32.h7 Bb7 33.h8(Q)+ Kc7 34.Qg7+ and 35.Qxg6, when White's passed h-pawn will win the game for him. White can also consider winning the f-pawn first so he doesn't have to worry about any counterplay. It's hard to believe that Black will be able to hold the g-pawn in any event. |
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| Jul-14-12 | | Al2009: I already knew this game. However, it is not very difficult, because with a h6 pawn near promotion, and Black's exposed King, the first thing you try is to do everything to promote Queen that pawn, i.e.: sac + interference on 8th file. |
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Jul-14-12
| | FSR: <al wazir: ... But if white was so smart, why didn't he play 27. Bxg6 ?> According to Tim Krabbé (previously cited by <SimonWebbsTiger> ): <Jan Timman told me that 27.Bc2 could have been a brilliant waiting move. Because when White plays Bxg6 then already, there follows 27...hxg6 28.Re7+ Rxe7 29.dxe7+ Kxe7 30.Rd8 Kxd8 31.h7 Bd7! 32.h8Q+ Be8 and Black has an impenetrable fortress. Only the desperado 27...b5 makes the combination winning; then White has cxb5 at the end of it. Timman did not think it would have actually happened this way, and this was confirmed in the reaction of a Belgian chess player, Deleyn. Years ago, he had been told by yet another Belgian who had played on the national team in that match, Marc Bonne, that Beyen had indeed not seen Bxg6 himself, and that it had been whispered to him after 27.Bc2 - not by Boey, but by yet another team member: IM Arthur Dunkelblum.> http://timkr.home.xs4all.nl/chess2/... |
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| Jul-14-12 | | gofer: I have a simple question. Is this just about exchanging a "2R+LSB" v
"2R+LSB" endgame for a "R+LSB" v "Q" endgame? If it is then it took
only a second to solve. The exchange on e7 and the sacrifice on g6 are
all too easily seen. But my only question is whether the "coup de grace"
of Rd8 enforcing the promotion is really worth it!!
<28 Bxg6 ...>
Black cannot refuse!
28 ... Rf8 29 Re7+ Kd8 30 Rxh7 and black has lost control of the
seventh rank and two pawns as well!
<28 ... hxg6>
<29 Re7+ Rxe7>
<30 dxe7+ ...>
Not taking Pe7 is probably suicide as it allows Rd8 without loss of the
rook, so I will ignore this.
<30 ... Kxe7>
Now to the crunch point.
<31 Rd8! ...>
The whole point of the exchanges and sacrifice. The only piece that can stop
the promotion is Ra8 and by playing Rd8 and forcing Kxd8 the pawn will
promote! Now is this a clear cut win for white? It looks pretty good... ~~~
OTB I would probably muck this up more times than not, but I suppose at
this level there is a clear "win"... |
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Jul-14-12
 | | tarek1: What I see now is something like
28.Re7+ RxR 29.dxe7+ Kxe7 30.Bxg6! hg
Now the problem is that if h7 then Bb7 and Black is just in time to catch the pawn
so :
31. Rd8!! Obstruction sacrifice ! threatening h7 and h8Q
Now 31...Kxd8 32.h7 Black cannot remove the B and the K from the back rank in one move so white queens
Other tries are obviously worse.
However, is the resulting position completely won ?
click for larger viewI don't know, but I don't see anything better. Time to check. |
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| Jul-14-12 | | Marmot PFL: Things like that happen in team tournaments, and even in individual events where a group of players need to catch the leader. |
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| Jul-14-12 | | 1stboard: Nifty,
Sacrafice the obvious passed pawn for the unlikely canadate in the H pawn .... |
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| Jul-14-12 | | LoveThatJoker: No solution formulated nor submitted.
No points gained today.
4.95 out 7 with my pass for the week already guaranteed. LTJ |
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| Jul-14-12 | | gofer: Hmmm, as suspected. OTB I can't find a win. But that just shows how rubbish I am at these sorts of endings... http://www.chessvideos.tv/endgame-t... |
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| Jul-14-12 | | RandomVisitor:
click for larger view Rybka 4.1 x64:
[+4.92] d=24 28.cxb5 Kd8 29.Rxc5 Rb8 30.Be4 Bd7 31.Bd5 Rf5 32.c4 Rg5+ 33.Kf2 Rb6 34.Re7 Rxd6 35.Rxh7 Rh5 36.Rh8+ Ke7 37.Rc7 Rxh2+ 38.Kf3 Kf6 39.Kxf4 g5+ 40.Kg3 Rh3+ 41.Kg2 Ra3 42.Rf8+ Kg6 43.h7 [+3.25] d=24 28.Rdd1 Rb8 29.cxb5 c4 30.Ba4 Rb6 31.Re4 Kd8 32.Rxc4 Be6 33.Re4 Bg4 34.Rde1 Rxd6 35.Re8+ Kc7 36.R8e7+ Rxe7 37.Rxe7+ Kb6 38.Rxh7 Bf5 39.Rf7 Rd8 40.h7 Rh8 41.Bb3 Kxb5 42.Kf2 Bd3 43.h4 |
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Jul-14-12
| | scormus: <SWT .... "#71 - A Whispered Move>
I suppose something you really dont want to have happen to you. |
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| Jul-14-12 | | RandomVisitor: 20.Bxf5!
click for larger view Rybka 4.1 x64: <d=19> [+10.74] 20...Kd8 21.Rf3 Bxf5 22.Rxf5 Qxd6 23.Rexe5 Kc8 24.Rd5 Qc6 25.Rf8+ Kc7 26.Qg7+ Kb6 27.Qxh8 Rxf8 28.Qxf8 Qc7 29.Qd6+ Qxd6 30.Rxd6+ Kc7 31.Rf6 a5 32.Rf7+ Kd6 33.Rxh7 a4 34.Rxb7 Ke5 35.Kf2 g5 [+11.00] 20...Be6 21.Rf3 0-0-0 22.Bg4 Bxg4 23.Rxf6 Rhe8 24.Qxh7 Bd7 25.Rxg6 e4 26.Qf7 Kb8 27.Qd5 Bc6 28.Qxc5 Rc8 29.Rg7 Red8 30.Qe5 Bd7 31.Qxe4 Bc6 [+M23] 20...Qxd6 21.Bxc8 Kd8 22.Qg7 exf4 23.Qxh8+ Kc7 24.Qxh7+ Kxc8 25.Re8+ Qd8 26.Rxd8+ Kxd8 27.Qh8+ Kc7 28.Qxa8 a6 29.Qf8 Kc6 30.Qxf4 a5 31.Qf6+ Kd7 32.Qf7+ Kd6 33.Qxb7 g5 34.Qd5+ Ke7 35.Qxg5+ Ke6 [+M23] 20...Bxf5 21.Rxf5 Qxf5 22.Qg7 Qe6 23.Qxh8+ Kd7 24.Qxa8 Qxd6 25.Qxb7+ Kd8 26.Qxh7 a6 27.Rf1 e4 28.Qh8+ Kd7 29.Rf7+ Kc6 30.Rf6 Kc7 31.Rxd6 Kxd6 32.Qf6+ Kd7 33.Qf7+ Kd6 34.Qxg6+ Ke5 35.Qxa6 Kf4 [+M10] 20...a6 21.Bxc8 Qxd6 22.Qg7 Rxc8 23.Qxh8+ Kd7 24.Rf7+ Kc6 25.Qxc8+ Kb6 26.Rf6 Qxf6 27.Rb1+ Ka5 28.Qxc5+ b5 29.Rxb5+ axb5 30.Qxb5+ |
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Later Kibitzing> |
Kibitzing
sac: 28.Bxg6