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Topic: White to Play and Win (Read 457 times) |
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ThudnBlunder
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This is a standard type chess puzzle.
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| « Last Edit: Dec 31st, 2003, 12:15am by ThudnBlunder » |
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THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you.
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Dudidu
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Re: White to Play and Win
« Reply #1 on: Dec 31st, 2003, 1:20am » |
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I would say: the white player first move sholud be bF1 - if the black king "takes" it (now or as long as the game continues)then the white pawn can reach H8 safely (and thats a winning position), o/w the second white player's move will be h3 (and thus the white pawn is defended by the white bishop) which will "gain" the the white king "enough time" to "reach the area", a thing that can force a white win....
I hope my description is understandable.
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ThudnBlunder
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Re: White to Play and Win
« Reply #2 on: Dec 31st, 2003, 1:41am » |
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Quote:which will "gain" the white king "enough time" to "reach the area", a thing that can force a white win....
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If White plays 1. Bf1 Black replies Kc3 and reaches 'the area' (the queening square) first.
Furthermore, it cannot be evicted by the white-squared bishop.
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| « Last Edit: Dec 31st, 2003, 1:43am by ThudnBlunder » |
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Margit
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Re: White to Play and Win
« Reply #3 on: Dec 31st, 2003, 1:46am » |
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I think the key is to stop black playing F3. Therefore
I play B-G4, followed by H2-H4
That looks as if it should work.
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Dudidu
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Re: White to Play and Win
« Reply #4 on: Dec 31st, 2003, 2:24am » |
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on Dec 31st, 2003, 1:41am, THUDandBLUNDER wrote:| and reaches 'the area' (the queening square) first... |
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Same problem as in White to Play and Win II - double oops... 
Quote:| That looks as if it should work... |
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It doesn't seem like this help...
1. B-G4 K-E3
2. H2-H4 K-F4
and still the black king is reaches 'the area' faster...::
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| « Last Edit: Dec 31st, 2003, 2:47am by Dudidu » |
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ThudnBlunder
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Re: White to Play and Win
« Reply #5 on: Dec 31st, 2003, 2:46am » |
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on Dec 31st, 2003, 1:46am, Margit wrote:I think the key is to stop black playing F3. Therefore
I play B-G4, followed by H2-H4
That looks as if it should work. |
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It doesn't.
1. Bg4 Ke3
2. h4 Kf4
3. B moves Ke5 (if 3. Bh5 Kg3)
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Margit
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Re: White to Play and Win
« Reply #6 on: Dec 31st, 2003, 2:47am » |
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Sure it does. After the bishop move, what can black do ?
He can't move F3 or G3 (check) and any one of G1, F1, E1, E2 or E3 loses immediately. Therefore he moves G2 but after H2-H4, he is always one move behind (try it).
G3, H5, G4 (the bishop is now irrelevant), H6, G5, H7, G6, H8
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Margit
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Re: White to Play and Win
« Reply #7 on: Dec 31st, 2003, 2:53am » |
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Whoops, Looks like E3 and then up the C1-H6 line stops this.
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Margit
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Re: White to Play and Win
« Reply #8 on: Dec 31st, 2003, 3:04am » |
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Ah, I think I have an idea.
We move B-C8 and follow it with H2-H3.
Then we have all the time in the world to move the king over to the G file. Haven't played it out yet, but it may work.
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Dudidu
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Re: White to Play and Win
« Reply #9 on: Dec 31st, 2003, 3:24am » |
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on Dec 31st, 2003, 3:04am, Margit wrote:Ah, I think I have an idea...
we have all the time in the world to move the king over to the G file. |
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Margit, it doesn't seem to work. The reason is similar to the reason that T&B gave as a response for my initial answer...
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Margit
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Re: White to Play and Win
« Reply #10 on: Dec 31st, 2003, 4:02am » |
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Actually, I think I like G4 then H3 better
Then I am fairly sure we can get the white king onto the F,G,H files.
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ThudnBlunder
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Re: White to Play and Win
« Reply #11 on: Dec 31st, 2003, 4:11am » |
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Did you know that positions with KB + KRP + K v. K are drawn (provided the lone king can control the queening square, h8)? However, this is a rare exception.
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| « Last Edit: Dec 31st, 2003, 4:15am by ThudnBlunder » |
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Margit
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Re: White to Play and Win
« Reply #12 on: Dec 31st, 2003, 4:18am » |
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No, TB, I didn't. I sort of had this in the back of my mind when I saw that black could just ping-pong between G7 and H8. Hmm
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James Fingas
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Re: White to Play and Win
« Reply #13 on: Dec 31st, 2003, 5:24am » |
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The bishop evidently must make the first move, since the pawn can't move and if the king moves first, the black king will play g1 and steal the pawn.
I'm thinking that B-d7 might be good. Note that the black king must make straight for h8 as long as white keeps moving the pawn. So here's how it would go:
1. B-d7 K-e3
2. h4 K-e4
3. h5 K-e5
4. h6 K-f6
5. B-e8 ??
So the black king can't go straight into the corner, and has to take a step back, either to d7 or g5. Either way, he can't get to the corner in time.
If black tries to short-circuit this approach by
2. h4 K-f4
then white plays
3. K-d4
and cuts him off. Black must then backtrack to either f3 or g3. Either way, he can no longer catch up with the pawn.
w00t! My first chess puzzle!
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ThudnBlunder
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Re: White to Play and Win
« Reply #14 on: Dec 31st, 2003, 9:14am » |
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Yes, that's right, James.
In fact, the original position is mate in 15 moves against best play.
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