Author: Albert Silver
Date: 19:20:38 12/27/04
Go up one level in this thread
On December 27, 2004 at 18:48:22, Uri Blass wrote:
>On December 27, 2004 at 18:05:21, Albert Silver wrote:
>
>>On December 27, 2004 at 12:15:31, Uri Blass wrote:
>>
>>>[D]5k2/8/P5B1/3P3p/3b4/8/1P6/1K6 w - - 0 56 bm d6
>>>
>>>Am I right to think that it is a draw after Bxh5?
>>
>>I haven't analyzed it, and have not time this minuite but will as I've studied
>>these a bit. I'd definitely think this could be won even without pushing d6
>>though.
>>
>>The general rule is that if the two pawns (and you have 3) are at least 2
>>squares apart, you can force the win using your king. Anyhow, this may not work
>>here, but as I said, I'm one foot aout the door, but I'd look closely at it all
>>the same.
>>
>>Get back later on this. Peace.
>>
>> Albert
>
>Nice rule but it seems that this rule does not work when the pawns are at d5 and
>a6.
>
>The black king can stay at d6 and the bishop at g1-a7 when the pawn at a6 helps
>black to prevent Ka6.
>
>I thought that with 3 pawns the king can go from f5 but it seems that this is
>also impossible.
>
>Going with the king to f6 without sacrificing a pawn is impossible because of
>Bd4 and after sacrificing a pawn white needs a better square.
>
>It is possible that I miss something but together with Yace I could see nothing.
>
>
>Uri
I checked Dvoretsky's Endgame Manual (I hadn't gotten that far yet) and found a
reference position that was so clear as to leave no doubt it is a draw:
[Event "?"]
[Site "?"]
[Date "1954.??.??"]
[Round "?"]
[White "Averbakh, Yury"]
[Black "?"]
[Result "1/2-1/2"]
[SetUp "1"]
[FEN "8/8/b1kP2p1/P5P1/8/BK6/8/8 b - - 0 1"]
[PlyCount "19"]
[Source "ChessCafe/CB"]
[SourceDate "2003.10.29"]
{The ideas we have examined thus far will help you orient yourself in the most
varied kinds of situations with disconnected pawns - even with a large number
of pawns on the board.} 1... Kd7 $1 2. Kc3 Ke6 3. Kd4 Be2 (3... Bb7 4. Kc5 Kd7
{amounts to the same thing.}) 4. Kc5 {(/\ Kc6-c7+-)} Bf3 $1 (4... Kd7 $2 {
would be a mistake: after} 5. Kd5 Bf1 6. Ke5 Be2 {
when the white king gets into the kingside. Now, White will get nothing out of}
7. Kf6 ({The correct idea is to play for zugzwang. From d3, the bishop defends
the g6-pawn on one diagonal, while on the other, it restrains the advance of
the a-pawn; ergo, it has no moves. White's king cannot be allowed to get to e7
- that means that, in addition to d7, the black king has just two other
squares: e8 and d8. We can take away the first one by putting the king on f7;
the second, by moving the bishop to c7.} 7. Bc5 Bf1 8. Bb6 Be2 9. Bc7 Bd3 10.
Kf6 Ke8 11. Kg7 $22 Kd7 12. Kf7 $22 $18) 7... Bd3 8. a6 $2 Bxa6 9. Kxg6 Ke8 $11
{with the same drawing position as in the game Berger - Kotlerman (with
opposite colors and reversed flanks).}) 5. a6 Kd7 6. Kb6 Kc8 $1 {
(the king maintains the zone: White threatened 7 Ka7 Kc8 8 d7+! Kxd7 9 Kb7+-)}
7. Ka7 Bg4 $1 ({Once again, Black must be accurate. After} 7... Bc6 $2 8. Bb4
$22 {he gets into zugzwang:} Bd7 9. Kb6 Bf5 10. d7+ $1 Kxd7 (10... Bxd7 11. a7)
11. Kb7 $18) 8. Kb6 Bf3 $1 9. Kc5 Kd7 $1 10. Kd4 Ke6 $1 $11 1/2-1/2
Albert
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