Author: Robert Hyatt
Date: 16:21:06 11/27/00
Go up one level in this thread
On November 26, 2000 at 22:00:48, Mike S. wrote:
>On November 26, 2000 at 21:30:07, Robert Hyatt wrote:
>
>>Actually the rule generally says "if ahead in material, trade pieces but
>>_not_ pawns... if behind in material, trade pawns but not pieces..."
>>
>>That solves your problem...
>
>Thanks! What does Crafty do in this position (I don't have a 17.x version
>installed yet at the moment)?
>
>Regards
Here is the current version's output:
nss depth time score variation (1)
1 0.00 0.00 1. hxg5 Nxg5+
1 0.00 ++ 1. h5!!
1 0.00 1.09 1. h5
1 0.00 1.36 1. Ra7+ Kf6
1-> 0.00 1.36 1. Ra7+ Kf6
2 0.00 1.19 1. Ra7+ Ke6 2. h5
2-> 0.01 1.19 1. Ra7+ Ke6 2. h5
3 0.01 -- 1. Ra7+
3 0.01 0.42 1. Ra7+ Kf6 2. Rxf7+ Kxf7 3. hxg5
3 0.03 0.74 1. h5 h6 2. Rc6
3-> 0.03 0.74 1. h5 h6 2. Rc6
4 0.04 0.72 1. h5 h6 2. Rc6 Nd6+ 3. Kf3
4-> 0.05 0.72 1. h5 h6 2. Rc6 Nd6+ 3. Kf3
5 0.06 0.79 1. h5 h6 2. Rc6 Nd6+ 3. Ke5 Nf7+ 4.
Kf5
5-> 0.36 0.79 1. h5 h6 2. Rc6 Nd6+ 3. Ke5 Nf7+ 4.
Kf5
6 0.37 0.74 1. h5 h6 2. Rc6 Kd7 3. Rf6 Ke7
6-> 0.56 0.74 1. h5 h6 2. Rc6 Kd7 3. Rf6 Ke7
7 0.62 1.02 1. h5 h6 2. Kf5 Kf8 3. Re6 Kg7 4. Kg4
7-> 1.31 1.02 1. h5 h6 2. Kf5 Kf8 3. Re6 Kg7 4. Kg4
8 1.37 1.21 1. h5 h6 2. Kf5 Kf8 3. Ra7 Nd8 4. Kg4
Ne6
8-> 1.57 1.21 1. h5 h6 2. Kf5 Kf8 3. Ra7 Nd8 4. Kg4
Ne6
9 1.70 1.42 1. h5 h6 2. Kf5 Kf8 3. Ra7 Nh8 4. Kg4
Nf7 5. Rd7
(3) 9-> 2.14 1.42 1. h5 h6 2. Kf5 Kf8 3. Ra7 Nh8 4. Kg4
Nf7 5. Rd7
10 2.31 ++ 1. h5!!
(2) 10 2.60 2.27 1. h5 h6 2. Kf5 Nd6+ 3. Kg6 Ne4 4.
Kxh6 Kf7 5. Ra4 Nc3 6. Rd4
10-> 3.43 2.27 1. h5 h6 2. Kf5 Nd6+ 3. Kg6 Ne4 4.
Kxh6 Kf7 5. Ra4 Nc3 6. Rd4
11 4.53 2.32 1. h5 h6 2. Kf5 Nd6+ 3. Kg6 Ne4 4.
Kxh6 Kf7 5. Ra4 Nc5 6. Rg4 Ne6
(2) 11-> 6.20 2.32 1. h5 h6 2. Kf5 Nd6+ 3. Kg6 Ne4 4.
Kxh6 Kf7 5. Ra4 Nc5 6. Rg4 Ne6
12 8.39 2.35 1. h5 h6 2. Kf5 Nd6+ 3. Kg6 g4 4. Ra4
g3 5. Ra3 g2 6. Re3+ Kd7 7. Rg3 Ke6
8. Rxg2
Note that this code has been significantly rewritten, so older versions probably
will behave a bit differently here. It was time to clean up the detection of
"one side can't win" and do it right, rather than in a kludge. It now knows
that KR vs KNP is not a win for the KR, ditto for KRB vs KRP and so forth...
the extra piece isn't enough.
>M.Scheidl
>
>>>[D]8/4kn1p/R7/6p1/4K2P/8/8/8 w - - 0 49
>>>
>>>49.Kf5? gxh4, and the game ended in a draw.
>>>
>>>The only winning move seems to be 49.h5.
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.