Author: Robert Hyatt
Date: 07:12:47 01/20/05
Go up one level in this thread
On January 19, 2005 at 23:57:03, Jon Dart wrote:
>[D] 4R3/6p1/PK4kp/1PB2p2/8/3r4/3rp3/8 w - -
>
>How long to play a7?
>How long to give it a + score?
>
>Arasan plays a7 almost immediately but the score is still
>negative after several minutes.
>
>Pharaon 2.1 plays a7 in 24 seconds, gives a + score after
>158 seconds (Athlon 2500+).
>
>--Jon
Crafty finds the move instantly, gets a draw score after a couple of seconds,
and gets a better score quickly after that:
(this on my dual xeon 2.8ghz)
12 3.05 -0.40 1. a7 Rd8 2. Rxd8 Rxd8 3. Bf2 Kf7 4.
Kc7 Ra8 5. b6 Ke6 6. Kb7 Rd8 7. a8=Q
Rxa8 8. Kxa8
12-> 3.22 -0.40 1. a7 Rd8 2. Rxd8 Rxd8 3. Bf2 Kf7 4.
Kc7 Ra8 5. b6 Ke6 6. Kb7 Rd8 7. a8=Q
Rxa8 8. Kxa8
13 5.31 +1 1. a7!!
13 7.64 0.01 1. a7 Rd8 2. Rxd8 Rxd8 3. Bf2 Kf7 4.
Kc7 Ra8 5. b6 Ke6 6. b7 Rxa7 7. Bxa7
e1=Q 8. b8=Q
13-> 8.19 0.01 1. a7 Rd8 2. Rxd8 Rxd8 3. Bf2 Kf7 4.
Kc7 Ra8 5. b6 Ke6 6. b7 Rxa7 7. Bxa7
e1=Q 8. b8=Q
14 21.65 +1 1. a7!!
14 29.48 0.45 1. a7 Rd8 2. Rxd8 Rxd8 3. Bf2 Kf7 4.
Ka6 Rd1 5. a8=Q Ra1+ 6. Kb7 Rxa8 7.
Kxa8 Ke6 8. b6 Kd6 9. b7
14-> 30.47 0.45 1. a7 Rd8 2. Rxd8 Rxd8 3. Bf2 Kf7 4.
Ka6 Rd1 5. a8=Q Ra1+ 6. Kb7 Rxa8 7.
Kxa8 Ke6 8. b6 Kd6 9. b7
15 1:01 +1 1. a7!!
15 2:07 1.19 1. a7 Ra2 2. Rxe2 Rxe2 3. a8=Q f4 4.
Bf8 f3 5. Qb7 Re6+ 6. Kc5 f2 7. Qxg7+
Kf5 8. Qg2 Rd2 9. Qh3+ Kg5 10. Qf1
Kf4
15-> 2:10 1.19 1. a7 Ra2 2. Rxe2 Rxe2 3. a8=Q f4 4.
Bf8 f3 5. Qb7 Re6+ 6. Kc5 f2 7. Qxg7+
Kf5 8. Qg2 Rd2 9. Qh3+ Kg5 10. Qf1
Kf4
? 16 2:10 1/28* 1. a7
White(1): ?
time=2:11 cpu=196% mat=-4 n=242744126 fh=91% nps=1.84M
ext-> chk=14274840 cap=173561 pp=733854 1rep=362882 mate=8264
predicted=0 nodes=242744126 evals=158024394 50move=0
endgame tablebase-> probes=1361 hits=117
SMP-> split=1210 stop=158 data=9/64 cpu=4:19 elap=2:11
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