Author: Bernhard Bauer
Date: 04:31:15 03/09/00
Go up one level in this thread
On March 08, 2000 at 20:19:48, Bruce Moreland wrote:
>On March 08, 2000 at 16:10:18, Côme wrote:
>
>>On March 08, 2000 at 15:41:45, Bruce Moreland wrote:
>
>>>Are you sure that 1. ... c5 is the best continuation? What about 1. ... Bf6 2.
>>>Be5 Kg7?
>
>>After 1. ... Bf6 ; Be5 and Kg7, white IMHO can play Bxf6+ and White position is
>>probably winning because he has a pawn up and the black king is misplaced.
>>Have you try this position on ferret ?
>
>No, that's its plan after thinking for 24 hours on this on a crusty old machine.
> The move might be bad, but just by looking at it with my eyeball it's an
>interesting alternative to 1. ... c5.
>
>You are right that white is a pawn up and is better, but the implication behind
>my program choosing this continuation is that it has figured out how to do the
>same or better against 1. ... c5. Its score is +1.35.
>
>I think this is an interesting problem, but very prone to misinterpretation.
>There are two aspects:
>
>1) Finding the move in the first place, which involves discovering that the rook
>can't be taken, and preferring the resulting position.
>
>2) Deciding that in the ensuing tactics, white has significant material
>advantage or a forced mate.
>
>You've gotten a lot of replies from people who have found programs that can get
>as far as the first aspect of this, and want to stop there, satisfied, but so
>far nobody has found a convincing crush. Are you sure that one exists?
>
>bruce
Here is what Crafty did on a 2xP3-450 with modified (lowered) extensions.
(4) 16-> 77:05 0.00 1. Rc4 Rd7 2. Kg2 Qd8 3. Rh1 Bd6 4.
Rc1 Be7
(3) 17 87:17 -0.04 1. Rc4 Rd7 2. Kg2 Qd8 3. Rh1 Bd6 4.
Rc1 Nh7 5. Re1 Nf6 6. Kg1 Bxg3 7. fxg3
Qc7 8. Qf2 Rcd8 9. Rec1 Nd5
17 207:41 ++ 1. Rxh5!!
17 507:30 0.67 1. Rxh5 c5 2. Rg1 cxd4 3. Be5 f6 4.
Bxd4 Rxd4 5. Qxc8 Qxb3 6. Qe8 Rd1 7.
Rh6 Rxg1+ 8. Kxg1 Qb4 9. Rxg6+ Kh8
10. h5 Kh7
17-> 509:15 0.67 1. Rxh5 c5 2. Rg1 cxd4 3. Be5 f6 4.
Bxd4 Rxd4 5. Qxc8 Qxb3 6. Qe8 Rd1 7.
Rh6 Rxg1+ 8. Kxg1 Qb4 9. Rxg6+ Kh8
10. h5 Kh7
18 611:06 0.79 1. Rxh5 c5 2. Rg1 cxd4 3. Be5 f6 4.
Bxd4 Rxd4 5. Qxc8 Qxb3 6. Qe8 Rd1 7.
Rh6 Rxg1+ 8. Kxg1 Qd1+ 9. Kg2 Qd6 10.
Rxg6+ Kh8 11. h5 Kh7
18-> 622:38 0.79 1. Rxh5 c5 2. Rg1 cxd4 3. Be5 f6 4.
Bxd4 Rxd4 5. Qxc8 Qxb3 6. Qe8 Rd1 7.
Rh6 Rxg1+ 8. Kxg1 Qd1+ 9. Kg2 Qd6 10.
Rxg6+ Kh8 11. h5 Kh7
19 826:19 0.67 1. Rxh5 c5 2. Rg1 cxd4 3. Be5 f6 4.
Bxd4 Rxd4 5. Qxc8 Qxb3 6. Qe8 Rd1 7.
Rh6 Rxg1+ 8. Kxg1 Qb4 9. Rxg6+ Kh8
10. Rg4 Qc5 11. Qf7 f5
19-> 849:42 0.67 1. Rxh5 c5 2. Rg1 cxd4 3. Be5 f6 4.
Bxd4 Rxd4 5. Qxc8 Qxb3 6. Qe8 Rd1 7.
Rh6 Rxg1+ 8. Kxg1 Qb4 9. Rxg6+ Kh8
10. Rg4 Qc5 11. Qf7 f5
So Crafty likes 1...c5 too.
Kind regards
Bernhard
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