Author: Richard Pijl
Date: 08:40:49 11/16/04
Go up one level in this thread
On November 16, 2004 at 11:14:11, Kolss wrote:
>On November 16, 2004 at 10:49:31, Alessandro Scotti wrote:
>
>>In this position (WAC 213):
>>
>>[D]3r1r1k/1b4pp/ppn1p3/4Pp1R/Pn5P/3P4/4QP2/1qB1NKR1 w - -
>>
>>the best move is Rxh7+, but is Rxg7 playable too?
>>
>>When I experiment with extensions I can get either this:
>>
>>Rxg7 Kxg7 Rxh7+ Kxh7 Qh5+ Kg7 Bh6+ Kh8 Bd2+ Kg8
>>
>>or this:
>>
>>Rxh7+ Kxh7 Qh5+ Kg8 Rxg7+ Kxg7 Bh6+ Kh7 Bf4+ Kg8
>>
>>both with a zero score.
>
>Hello,
>
>If I recall right (no program available to check at the moment), Rxg7 is NOT a
>solution: it only leads to a draw by repetition, while Rxh7+ is a checkmate in
>something like 16 (or 14). The difference is that after Rxg7 Kxg7 Rxh7+ Kxh7
>Qh5+, the black king can go to g8 instead of g7, such that the bishop check on
>h6 is no longer possible.
>
>Please correct me if I am wrong, as I said, I do not have a chess program at
>hand to check...
>
>Best regards - Munjong.
Analysis by the Baron 1.5.0:
Rxh7+ wins:
14(27)+ 0:34.11 8395187 +5.78 Rh5xh7 (Kh8xh7) (Qe2-h5) (Kh7-g8) (Rg1xg7)
(Kg8xg7) (Bc1-h6) (Kg7-h8) (Bh6-g5)
(Kh8-g8) (Qh5-g6)
(Kg8-h8) (Bg5-f6) (Rf8xf6) (e5xf6)
(Qb1xe1) (Kf1xe1)
(Nb4-c2) (Ke1-d1) (Rd8xd3) (Kd1-c1)
(Rd3-d1) (Kc1xd1)
I suspect this fail high will result in a matescore when given sufficient time.
Rxg7 draws:
14(26). 1:10.20 11553122 +0.00 Rg1xg7 Kh8xg7 Rh5xh7 Kg7xh7 Qe2-h5 Kh7-g8
Qh5-g6 Kg8-h8 Qg6-h6 Kh8-g8 Qh6-g6 <rep>
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