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Subject: Re: Intersting testposition: multiple passed pawns

Author: Vincent Diepeveen

Date: 08:54:12 03/24/03

Go up one level in this thread


On March 24, 2003 at 11:40:47, Uri Blass wrote:

then yace has it wrong for Ng1.

How can i ever communicate with a person who is just
busy writing over at very slow hardware what Yace wants
instead of looking to the position.

DIEP says black up 3.0 after ng1:

00:26 212290 212k 0 0 5632057 (2) 17 (136,896) 3.045 Kb7-c7 Kc4-b3 Kc7-c6 Kb3-c4
 a5-a4 Kc4-b4 e5-e4 Kb4xa4 e4xd3 Ka4-b3 Kc6xc5 Kb3-b2 Kc5-d5 Kb2-c1 Kd5-e5 Kc1-d
1 Ke5-e4 Kd1-d2 Ke4-e5 Kd2xd3

i told you to turn off nullmove. with nullmove it won't get a high
score. you never listen?


>On March 24, 2003 at 11:13:12, Vincent Diepeveen wrote:
>
>>On March 23, 2003 at 15:19:27, Alexander Kure wrote:
>>
>>>Hi everybody,
>>>
>>>I found an interesting position taken from one of my games when i was an active
>>>tournament player in the 1990ies:
>>>
>>>[d]8/p3b3/1k6/4p2p/K1Pp2pP/3P2P1/3N4/8 b - - 0 1
>>>
>>>Here i played the stunning Bxh4!
>>>The idea is that black will force 3 passed pawns that can not be stopped by
>>>white's knight and king.
>>>
>>>A possible continuation will be:
>>>1...Bxh4 2. gxh4 g3 3. Nf3 g2 4. Kb4 a5 5. Kb3 Kc5 6. Ng1 e4 7. dxe4 a4
>>>and the 3 black passers are too much for white to handle.
>>>
>>>I am interested in which programs will find this solution.
>>
>>Without nullmove perhaps some will, by default i have nullmove turned
>>on though.
>>
>>Very cool sacrafice!
>>
>>i had played quickly:
>>   bxh4 gh g3 c5 kc6 kb4 a5! kc4 g2 nf3 kb7 kb3
>
>Yace does not like Kb3 in that line
>
>It says
>
>depth=21 -0.41 t  7.Ng1 Kc7 8.Nh3H Kc6H 9.Ng1H a4H 10.Kb4H e4H 11.Kxa4H exd3H
>12.Kb3H Kxc5H 13.Kb2H Kd5H 14.Kc1H Ke5H 15.Kd2H Ke4H 16.Nh3H Kf3H 17.Kxd3H Kg4H
>18.Ng1H Kxh4H 19.Kxd4H {HT} {180}
>Nodes: 56578747 NPS: 527639
>Time: 00:01:47.23
>depth=21 -0.41 .  7.Ng1 Kc7 8.Nh3 Kc6 9.Ng1 a4 10.Kb4 e4 11.Kxa4 exd3 12.Kb3
>Kxc5 13.Kb2 Kd5 14.Kc1 Ke5 15.Kd2 Ke4 16.Nh3 Kf3 17.Kxd3 Kg4 18.Ng1 Kxh4 19.Kxd4
>{HT} {180}
>Nodes: 116484437 NPS: 505245
>depth=22 -0.31 t  7.Ng1 Kc7 8.Nh3 Kc6 9.Ng1 a4 10.Kb4 e4H 11.Kxa4H exd3H 12.Kb3H
>Kxc5H 13.Kb2H Kd5H 14.Kc1H Ke5H {HT}
>Nodes: 149645128 NPS: 516552
>Time: 00:04:49.70
>Time: 00:03:50.55
>
>After Kb3? it says
>
>depth=18 +0.32 t+ 7...Ka6 8.Nxd4 g1=Q 9.c6
>Nodes: 15934691 NPS: 559897
>Time: 00:00:28.46
>depth=18 +0.71 ++ 7...Ka6 8.Nxd4 g1=Q 9.c6
>Nodes: 26248886 NPS: 544469
>Time: 00:00:48.21
>depth=18 +1.54 t  7...Ka6 8.Ng1 Kb5 9.c6 Kxc6 10.Kc4 Kd6 11.Ne2 Ke6 12.Kb5 e4H
>13.Kc4H Ke5H 14.Kc5H exd3H 15.Ng1H Ke4H 16.Nf3H d2H {HT} {-20}
>Nodes: 34887272 NPS: 535327
>Time: 00:01:05.17
>depth=18 +1.54 .  7...Ka6 8.Ng1 Kb5 9.c6 Kxc6 10.Kc4 Kd6 11.Ne2 Ke6 12.Kb5 e4
>13.Kc4 Ke5 14.Kc5 exd3 15.Ng1 Ke4 16.Nf3 d2 {HT} {-20}
>Nodes: 47931301 NPS: 539281
>Time: 00:01:28.88
>depth=19 +1.61 t  7...Ka6 8.Ng1 Kb5 9.c6 Kxc6 10.Kc4 Kd6 11.Nf3 Ke6 12.Ng1 Kf5
>13.Kc5 Kg4 14.Kc4H Kg3H 15.Kd5H {HT} {-100}
>Nodes: 60731982 NPS: 532596
>Time: 00:01:54.03
>depth=19 +1.61 .  7...Ka6 8.Ng1 Kb5 9.c6 Kxc6 10.Kc4 Kd6 11.Nf3 Ke6 12.Ng1 Kf5
>13.Kc5 Kg4 14.Kc4 Kg3 15.Kd5 {HT} {-100}
>Nodes: 82105333 NPS: 536320
>Time: 00:02:33.09
>depth=20 +1.76 t  7...Ka6 8.Ng1 Kb5 9.c6 Kxc6 10.Kc4 Kd6 11.Nf3 Ke6 12.Ng1 Kf5
>13.Kc5 Kg4 14.Kd5 a4 15.Kc4 {HT} {-100}
>Nodes: 109892425 NPS: 527897
>Time: 00:03:28.17
>
>Uri



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