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| Apr-07-10 | | zooter: Ok, I think I might have just got this
28...Rg5+ 29.Kh3 (29.Kh1 Rf1#) Rf3+ 30.Kh4
So far all forced, well and good. Now comes the surprise, 30...Rg1
This move threatens 31...g5+ 32.Kh5 Rh3#
and there is no defense. White can throw in a few checks but eventually has to give up material to avoid mate Time to check |
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| Apr-07-10 | | zooter: wow, white gave up. So am I correct? |
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| Apr-07-10 | | 310metaltrader: u got it, white king wedded to the h file like tiger is to golf. |
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| Apr-07-10 | | dzechiel: Black to move (28...?). White is up a pawn. "Medium/Easy." White's extra pawn is doubled and isolated on the b-file, so the actual material advantage is negligible. What is important is that white's king is in the open and exposed to harassment by black's rooks. It doesn't take too long to spot 28...Rg5+
as the key move (it's very forcing).
29 Kh3
Of course not 29 Kh1 because 29...Rf1# is checkmate.
29...Rf3+ 30 Kh4
Once again forced. Getting to this position took only a couple of seconds. This is where the "hard to find" move is played. 30...Rg1
A wonderful move! The threat is 31...g5+ 32 Kh5 Rh3#. White has rook checks (31 Rd8+ or 31 Re8+), but after 31...Kf7 white has a rook en prise and black's two move mate is still in the works. Even if the black pawn on c5 wasn't on the board 31 Rd4 would not ultimately stop the checkmate effected by the black rooks. I think this is it, time to check.
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It looks like white didn't want to wait around for 30...Rg1. Time to check the other kibitzing. |
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| Apr-07-10 | | OrangeBishop: What a nice combination by Timman.
So where did White go wrong? Was it 23. Raxa6, after which he has no good way of protecting the f2 pawn after Rbf7? Given that Timman played Rb7 first, it looks as if going to f7 wasn't his original intention. |
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| Apr-07-10 | | patzer2: For today's Wednesday puzzle solution 28...Rg5+!, I visualized the game continuation up to the point of White's resignation. However, I missed the winning followup 30...Rg1! So I count myself as having not solved the puzzle, even though I learned a new Rook and Pawn endgame tactic. Interestingly, after 29. Kh4 Van der Sterren resigned, as he apparently thought Timman would have no problem finding 30...Rg1! Seems to me he should have at least waited for Timman to play 30...Rg1!, since other Black moves leave White in the game with drawing chances. |
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Apr-07-10
 | | tarek1: This is an endgame, but obviously here the white king is exposed,
and in double-rook endgames one always has to watch out for mating threats.
Here Black can drive the white king into a mating net : <28...Rg5+> restricts the white king's living space to one file on the side <29.Kh3> Obviously 29.Kh1 Rf1# <29...Rf3+> restricting again, and driving the king further towards black's pawns range of action. <30.Kh4> Now the black rook is hanging, we could defend it by 30...h6 but this doesn't make the attack progress. <30...Rg1!>
This quiet move is possible because white doesn't have real threats : if Re8+ or Rd8+ then Kf7 and now what ?
It removes the rook from the attack but also threatens mate in 2 : <31...g5+ 32.Kh5 Rh3#> Actually this threat seems unavoidable I don't find a meaningful response for White.
White could perhaps prevent the mate by giving up a rook Rd8+ and Rf6+ but obviously it doesn't make much of a difference... |
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| Apr-07-10 | | Shah Mat: looked first at 28...Rg5+ if 29 Kh1 Rf1#, so 29 Kh3 is the only legal move. then Rf3+ Kh4 and white can resign. woop got it!! |
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| Apr-07-10 | | tacticalmonster: 1) Black was down a pawn and the c5 pawn was weak.
2) White king had no pawn shelther
3) White had a passed e5 pawn and doubled b pawn
4) White e6 rook was oddwardly placed
candidate: Rg5+ - Black cant survive the endgame for long so he must attack the exposed king a) 29 Kh1 Rf1#
b) 29 Kh3 Rf3+ 30 Kh4 Rg1! 31 Rd8+ Kf7 32 Ra6 g5+ 33 Kh5 Rh3# I spent almost 15 minutes on this puzzle, the longest time I have ever spent on a Wed puzzle. |
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| Apr-07-10 | | lost in space: Haven't found 30...Rg1. "§&%/!!!! |
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| Apr-07-10 | | turbo231: I was feeling bad because I couldn't see a mate. If white moves to h1 it's a instant mate, but h3 that's a different story. So I played computer vs computer the result, draw. White was seeing things he had a draw and didn't even know it. |
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| Apr-07-10 | | SamAtoms1980: Sitting in Timman's seat would be amusing, seeing as I got moves one and two. The game would continue 28 ... Rg5+ 29 Kh3 Rf3+. White would play 30 Kh4, and then, while I was pondering my next move, he would resign. I'd be like "LOL, OK." |
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| Apr-07-10 | | gofer: Well what about the obvious...
28 ... Rg5+
29 Kh3 Rf3+ (Kh1 Rf1#)
30 Kh4 Rg1
Now white has to deal with the forced mating combination of 31 ... g5+ 32 Kh5 Rh3# and I cannot
see any obvious ways to deal with this...
31 Re8+ Kf7 attacking Re8 and so gaining the one tempo needed to start the mating combination 31 Rd8+ Kf7 attacking Re6 and so gaining the one tempo needed to start the mating combination In each case, white ends up giving a rook without actually stopping the mate! So then we end up with
suicidal moves...
31 Rg6 hxg6
Now black is threatening both 32 ... Kh7 33 ... g5 34 ... Rh3# and 32 ... Rf5 33 ... Rh5#, so it is really all over. Time to check... |
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| Apr-07-10 | | TheaN: The truth is that I did not get this one. Amazing that vd Sterren resigned on his own move; it is just when Timman has to prove he saw the combination in advance. In fact I missed Rg1 in my board vision, and playing Rg5† and Rf3† might just be out of forcing nature. The fact that it traps the White King in a peculiar position makes these moves natural and could have been played without Rg1 in mind. |
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| Apr-07-10 | | agb2002: Black is one pawn down.
White may threaten the pawn on c5 or to double rooks on the seventh rank if Black moves his rook on f8 along the first rank. Black can exploit the airy position of the white king with 28... Rg5+ 29.Kh3 (29.Kh1 Rf1#) Rf3+ 30.Kh4 Rg1, and White can't stop 31... g5+ 32.Kh5 Rh3# without losing material (33.Rg6 Rxg6, etc.). |
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| Apr-07-10 | | TheBish: Van der Sterren vs Timman, 1981 Black to play (28...?) "Medium/Easy"
28...Rg5+ 29. Kh3 Rf3+ 30. Kh4 Rg1! and White is helpless against the threat of 31...g5+ 32. Kh5 Rh3#, i.e. 31. Re8+ (or Rd8+) Kf7 and after the rook is saved, mate follows. |
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| Apr-07-10 | | gofer: Do you think Timman saw all this on move 22! It looks like he played 22 ... Rb7 to lure white into taking Pa6, so that Rbf7 starts a winning combination... ...beware of "Greek Gifts"... :-) |
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| Apr-07-10 | | agb2002: <patzer2:
...
Interestingly, after 29. Kh4 Van der Sterren resigned, as he apparently thought Timman would have no problem finding 30...Rg1! Seems to me he should have at least waited for Timman to play 30...Rg1!, since other Black moves leave White in the game with drawing chances.>I have the impression that Timman played 26... Rf1+ to create a double threat with 27... R1f5: 28... Rxe5 and 28... Rg5+. |
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| Apr-07-10 | | cocker: Another failure for me; saw the first two checks but missed 30 ... ♖g1. Seems a bit hard for a Wednesday, or is it just me? |
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| Apr-07-10 | | whiteshark: <28...Rg5+ 29.Kh3> (else Rf1#) <Rf3+ 30.Kh4 Rg1!!> 
click for larger view and white is lost due to ...g5+/...Rh3# threat. |
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| Apr-07-10 | | Dr.imperial: :)missed Rg1 today. Bad if i miss such moves in tournament play. |
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| Apr-07-10 | | A Karpov Fan: got it (very easy as it is all forced) |
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| Apr-07-10 | | johnlspouge: Wednesday (Medium/Easy)
Van der Sterren vs Timman, 1981 (28...?) Black to play and win.
Material: Down a P. The White Kg2 has 4 legal moves and is vulnerable to Rf5-g5+ or Rf5-f7+. The Black Kg8 is secured from check. Candidates (28...): Rg5+
28…Rg5+ 29.Kh3 [Kh1 Rf1#]
39…Rf6+ 40.Kh4 Rg1 (threatening 42…g4+ 43…Rh3#)
The interposition Rf2-f4-h4 is both infeasible and pointless, so White can only check: 41.Rd8+ [or Re8+] Kf7 42.Rd7+
After the Black Kf7 captures the R on the e-file, 43.Rxh7 prevents mate, but White is down a R for 2P. Toga prefers 42.Rf6+ as a "defense", but White still must drop a R to avoid mate. |
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| Apr-07-10 | | johnlspouge: < <whiteshark> wrote: <28...Rg5+ 29.Kh3> (else Rf1#) <Rf3+ 30.Kh4 Rg1!!> > They should have had the Qs on the board, just to make your day :) |
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| Apr-07-10 | | wordfunph: 28...Rg5+ 29.Kh3 Rf3+ 30.Kh4...
then black is winning but it will take some time.. |
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