Author: Richard Pijl
Date: 00:36:19 02/17/05
Go up one level in this thread
On February 16, 2005 at 20:54:21, Scott Gasch wrote:
>On February 16, 2005 at 20:23:31, Dann Corbit wrote:
>
>>On February 16, 2005 at 19:50:15, Peter Berger wrote:
>>
>>>What a pity that you are still sworn to create a poem for each and every program
>>>that manages to get 295/300 :P
>>
>>But a further requirement was that it occur on my 950 MHz AMD Athlon, where in
>>the same 5 second time frame, crafty scores 292/300.
>>
>>However, in the light of a perfect score (albeit on a faster machine) I think
>>crafty deserves some special recognition.
>
>I'd be surprised to see many engines solve wac002 in under 5 seconds _with a PV
>that includes a promotion_. It seems like this is a position that overvaluing
>passers can help you solve quickly.
>
>Scott
It has nothing to do with overvaluing passers. Solving it quickly perhaps does
involve adding some specific knowledge on connected passers against a rook (with
king far enough away).
The Baron knows at least one pawn will promote quite soon, without seeing the
actual promotion in search. It knows the pawn will promote after doing ply 9. It
is seen in search at the 11th ply (not shown in the pv, but on the next move the
pawn promotes, which is seen in qsearch). Output below is from a Xeon 2.8.
ply time nodes score pv
6(11)& 0:00.05 13555 +1.45 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 Rd2xd3
6(11). 0:00.06 22266 +1.45 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 Rd2xd3
7(14)& 0:00.09 31264 +1.45 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 Rd2xd3 Ra3xd3 (Ke4xd3)
7(17). 0:00.14 58904 +1.45 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 Rd2xd3 Ra3xd3 (Ke4xd3)
8(16)& 0:00.19 79313 +1.60 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 h2-h4 h7-h5 Ke4-d5
8(19). 0:00.34 143939 +1.60 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 h2-h4 h7-h5 Ke4-d5
9(17)& 0:00.44 190213 +1.49 c4-c3 b2xc3 Rb3xc3 e3-e4 f5xe4
Kf3xe4 Rc3xa3 h2-h3 Kf6-e6 Rd2xd3
9(21)+ 0:00.75 335082 +2.40 Rb3xb2 (Rd2xb2) (c4-c3) (Rb2-b6) (Kf6-g7)
(Rb6-b7) (Kg7-g6) (Rb7-b6) (Kg6-h5) (Rb6-b
1) (c3-c2)
9(21)& 0:01.06 479049 +2.77 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-g7
Rb6-b7 Kg7-g6 Rb7-b6 Kg6-h5 Rb6-b5 c3-c2
Rb5xf5 Kh5-g6 Rf5-d5
9(21). 0:01.28 577236 +2.77 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-g7
Rb6-b7 Kg7-g6 Rb7-b6 Kg6-h5 Rb6-b5 c3-c2
Rb5xf5 Kh5-g6 Rf5-d5
10(22)& 0:01.83 814113 +2.58 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-g7
Rb6-b7 Kg7-g6 Rb7-b6 Kg6-h5 Rb6-b7 c3-c2
Rb7xh7 Kh5-g6 Rh7-d7 Kg6-f6
10(22). 0:02.20 990807 +2.58 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-g7
Rb6-b7 Kg7-g6 Rb7-b6 Kg6-h5 Rb6-b7 c3-c2
Rb7xh7 Kh5-g6 Rh7-d7 Kg6-f6
11(24)+ 0:04.86 2170116 +3.87 Rb3xb2 (Rd2xb2) (c4-c3) (Rb2-b6) (Kf6-e7)
(Rb6-b7) (Ke7-d8) (Rb7-b8) (Kd8-c7)
11(24)& 0:05.97 2664711 +3.87 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-e7
Rb6-b7 Ke7-d6 Rb7-b6 Kd6-c5 Rb6-b1 c3-c2
Rb1-c1 Kc5-b5 Kf3-g3 d3-d2 Rc1xc2
11(24). 0:06.84 3075871 +3.87 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-e7
Rb6-b7 Ke7-d6 Rb7-b6 Kd6-c5 Rb6-b1 c3-c2
Rb1-c1 Kc5-b5 Kf3-g3 d3-d2 Rc1xc2
12(27)& 0:10.02 4506663 +3.87 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-e7
Rb6-b7 Ke7-d6 Rb7-b6 Kd6-c5 Rb6-b1 c3-c2
Rb1-c1 Kc5-b5 Kf3-g3 d3-d2 Rc1xc2 d2-d1Q
12(27). 0:11.50 5215932 +3.87 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-e7
Rb6-b7 Ke7-d6 Rb7-b6 Kd6-c5 Rb6-b1 c3-c2
Rb1-c1 Kc5-b5 Kf3-g3 d3-d2 Rc1xc2 d2-d1Q
13(29)& 0:24.11 10846137 +3.98 Rb3xb2 Rd2xb2 c4-c3 Rb2-b6 Kf6-e7
Kf3-f2 c3-c2 Rb6-c6 Ke7-d7 Rc6-c3 d3-d2
Rc3xc2 d2-d1Q Rc2-b2 Qd1-b3 Rb2-d2 Kd7-c6
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