Author: Frank E. Oldham
Date: 00:24:12 07/09/04
Go up one level in this thread
On July 08, 2004 at 17:19:36, Uri Blass wrote:
>[D]1r6/4kpp1/b1pp3p/q1n1pP2/Pr2P3/1BN3Q1/P1P3PP/K2RR3 w - - 0 24
>
>How much time does your program need to avoid Qxg7 and does it avoid it because
>it can see a loss or because it see a draw.
>
>Uri
Hi Uri,
Good luck in the tournament !
This is a difficult search for crafty19.14.
On a dual 2GHz G5 crafty sees successive fail-lows on plies 10, 11, and 13 for
Qxg7 -- the last fail-low is from 0.01 to -1.78 ! So at 5 mins 35 secs crafty
knows it has a problem with Qxg7 :-)
Finding a good replacement is tough -- h3 (Shredder's choice) is selected for a
while, but eventually Re3 is chosen, with a score & PV similar to Junior8's
result. This result may be the best W can get.
9-> 3.29 1.50 1. Qxg7 Rxb3 2. f6+ Kd8 3. Qf8+ Kc7
4. Qxd6+ Kb7 5. axb3 Qxc3+ 6. Kb1 Rg8
7. Rd2
10 3.58 -1 1. Qxg7
10 4.81 0.88 1. Qxg7 Rxb3 2. f6+ Kd8 3. Qf8+ Kc7
4. Qxd6+ Kb7 5. axb3 Qxc3+ 6. Kb1 Ka8
7. a5 Na4
10-> 10.72 0.88 1. Qxg7 Rxb3 2. f6+ Kd8 3. Qf8+ Kc7
4. Qxd6+ Kb7 5. axb3 Qxc3+ 6. Kb1 Ka8
7. a5 Na4 (s=6)
11 13.14 -1 1. Qxg7
11 16.32 0.01 1. Qxg7 Rxb3 2. f6+ Ke8 3. Qg8+ Kd7
4. Qxf7+ Kc8 5. axb3 Qxc3+ 6. Kb1 Bd3
7. Qg8+ Kb7 8. Qf7+ Kc8 (s=5)
11-> 1:55 0.01 1. Qxg7 Rxb3 2. f6+ Ke8 3. Qg8+ Kd7
4. Qxf7+ Kc8 5. axb3 Qxc3+ 6. Kb1 Bd3
7. Qg8+ Kb7 8. Qf7+ Kc8 (s=15)
12 2:04 0.01 1. Qxg7 Rxb3 2. f6+ Ke8 3. Qg8+ Kd7
4. Qxf7+ Kc8 5. Nd5 cxd5 6. Qg8+ Kc7
7. Qf7+ Kc8 (s=14)
12-> 4:21 0.01 1. Qxg7 Rxb3 2. f6+ Ke8 3. Qg8+ Kd7
4. Qxf7+ Kc8 5. Nd5 cxd5 6. Qg8+ Kc7
7. Qf7+ Kc8 (s=8)
13 4:38 -1 1. Qxg7
13 5:35 -1.78 1. Qxg7 Rxb3 2. f6+ Kd7 3. Nd5 cxd5
4. Qxf7+ Kc8 5. Qg8+ Kc7 6. Qh7+ Nd7
7. axb3 Qc3+ 8. Kb1 Bd3 9. Rxd3 Qxe1+
10. Ka2 dxe4 (s=7)
13 11:58 -1.10 1. Nb1 Kf8 2. f6 gxf6 3. Qh4 Ke7 4.
Qxh6 Rxe4 5. Qd2 Qxd2 6. Nxd2 Rg4 7.
g3 Nxa4 (s=5)
13 20:35 -0.89 1. Re3 Rd4 2. Rb1 Kf8 3. f6 gxf6 4.
Rc1 Qd8 5. Qh3 Kg7 6. Rg3+ Kh7 <HT>
(s=4)
13 24:15 -0.69 1. h3 Bc4 2. Re3 Bxb3 3. cxb3 Rd4 4.
Rf1 Kf8 5. f6 g6 6. Rd1 Rxd1+ 7. Nxd1
Rb4 8. Qg4 Kg8 (s=3)
13-> 48:21 -0.69 1. h3 Bc4 2. Re3 Bxb3 3. cxb3 Rd4 4.
Rf1 Kf8 5. f6 g6 6. Rd1 Rxd1+ 7. Nxd1
Rb4 8. Qg4 Kg8 (s=10)
14 53:55 -0.59 1. h3 Bc4 2. Re3 Bxb3 3. cxb3 Rd4 4.
Rf1 Kf8 5. f6 g6 6. Qh4 h5 7. Qg3 Rd2
8. Rd1 (s=9)
14 57:26 +1 1. Re3!!
14 67:34 -0.19 1. Re3 Rd4 2. Rc1 Nxb3+ 3. axb3 Rg8
4. Kb1 Qb6 5. Rd1 Qc5 6. Qh4+ f6 7.
Qg3 Rb4 8. Na2 Rbb8 9. Nc3 (s=8)
14-> 81:30 -0.19 1. Re3 Rd4 2. Rc1 Nxb3+ 3. axb3 Rg8
4. Kb1 Qb6 5. Rd1 Qc5 6. Qh4+ f6 7.
Qg3 Rb4 8. Na2 Rbb8 9. Nc3 (s=2)
15 89:46 -0.13 1. Re3 Rd4 2. Rc1 Nxb3+ 3. axb3 Rg8
4. Kb1 Qb6 5. Rd1 Qc5 6. Qg4 f6 7.
Rh3 Rb4 8. Na2 Rbb8 9. Nc3
15-> 128:20 -0.13 1. Re3 Rd4 2. Rc1 Nxb3+ 3. axb3 Rg8
4. Kb1 Qb6 5. Rd1 Qc5 6. Qg4 f6 7.
Rh3 Rb4 8. Na2 Rbb8 9. Nc3 (s=4)
16 150:14 -0.13 1. Re3 Rd4 2. Rc1 Kf8 3. f6 gxf6 4.
Qh4 Ke7 5. Qxh6 Rg8 6. g3 Rb8 7. Rf3
Nd7 8. Qg7 Bc4 9. Bxc4 Rxc4 (s=3)
16-> 342:01 -0.13 1. Re3 Rd4 2. Rc1 Kf8 3. f6 gxf6 4.
Qh4 Ke7 5. Qxh6 Rg8 6. g3 Rb8 7. Rf3
Nd7 8. Qg7 Bc4 9. Bxc4 Rxc4 (s=8)
? 17 342:30 1/38* 1. Re3
White(1): ?
time=342:34 cpu=395% mat=1 n=45517298850 fh=92% nps=2.21M
ext-> chk=-1172410307 cap=96644811 pp=43008974 1rep=291182484
mate=27885830
predicted=0 nodes=45517298850 evals=3792268431 50move=0
endgame tablebase-> probes=0 hits=0
SMP-> split=8753 stop=1883 data=9/64 cpu=1354:50 elap=342:34
Frank
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.