Author: Robert Hyatt
Date: 10:49:04 12/13/03
Go up one level in this thread
On December 12, 2003 at 22:25:55, Robert Hyatt wrote:
>On December 12, 2003 at 17:10:10, Will Singleton wrote:
>
>>On December 12, 2003 at 16:53:34, Robert Hyatt wrote:
>>
>>>On December 12, 2003 at 16:32:36, Will Singleton wrote:
>>>
>>>>On December 12, 2003 at 16:21:38, Uri Blass wrote:
>>>>
>>>>>On December 12, 2003 at 15:13:40, Will Singleton wrote:
>>>>>
>>>>>>On December 12, 2003 at 13:49:35, Robert Hyatt wrote:
>>>>>>
>>>>>>>On December 12, 2003 at 13:40:07, Will Singleton wrote:
>>>>>>>
>>>>>>>>Here's a position from a recent game, this one gives Amateur fits.
>>>>>>>>How long to see black is busted?
>>>>>>>>
>>>>>>>>[d]4rr2/1b3p1k/pp5p/2b1pQ2/q7/P2R2B1/1PP3PP/2KR4 b - -
>>>>>>>
>>>>>>>
>>>>>>>For Crafty, the bottom begins to fall out at 6 seconds or so, where
>>>>>>>it begins to see it is not ahead. By 60 seconds it has failed low
>>>>>>>to white a pawn up and climbing:
>>>>>>>
>>>>>>> 12-> 4.84 -0.69 1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
>>>>>>> 4. Qxe5 Re8 5. Rd8 Bc6 6. Rxe8+ Bxe8
>>>>>>> 7. Rd6 Qb5 8. Qf4 Qg5 <HT>
>>>>>>> 13 6.66 -- 1. ... Kg8
>>>>>>> 13 15.28 0.31 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>>>>>> Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
>>>>>>> 7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
>>>>>>> 13-> 17.91 0.31 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>>>>>> Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
>>>>>>> 7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
>>>>>>> 14 35.70 0.00 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>>>>>> Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
>>>>>>> Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
>>>>>>> 10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
>>>>>>> 14-> 40.01 0.00 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
>>>>>>> Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
>>>>>>> Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
>>>>>>> 10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
>>>>>>> 15 51.44 -- 1. ... Kg8
>>>>>>> 15 1:30 0.98 1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
>>>>>>> 4. Qxe5 Re8 5. Rg4+ Qxg4 6. Qxe8+ Kg7
>>>>>>> 7. Qe5+ f6 8. Qc7+ Kg6 9. Rd7 Qg5+
>>>>>>> 10. Kb1 Bxg2 11. Rg7+ Kf5 12. Rxg5+
>>>>>>> hxg5
>>>>>>
>>>>>>That's only half the story. Let it think another half hour.
>>>>>>
>>>>>>Will
>>>>>
>>>>>Do you mean to bigger score against black or to the fact that 1...Kh8 is also
>>>>>bad for black because of b4 for example f6 Bh4 Be7 Qg6 Be4 Qxe4 or Bxb4 Bxe5+
>>>>>Rxe5 Qxe5+ f6 Qe3?
>>>>>
>>>>>Uri
>>>>
>>>>Right, it takes a bit longer to see that black is also bad after Kh8, because of
>>>>b4 etc... the scores should be about equivalent for Kg8 and Kh8.
>>>>
>>>>Will
>>>
>>>It had already passed on Kh8 when I stopped it (actually when the machine
>>>was shut down for processor upgrade).
>>
>>Well, I'd be interested to see your result on the quad. Crafty here eventually
>>selects Kh8 b4, but the score isn't as convincing.
>>
>>Will
>
>
>That was on the quad... I'll try to run it longer if I can. I was going to
>run the above longer but the machine was shut down in the middle of the run,
>or it crashed. They had upgraded and were probably fiddling with bios settings
>and found one that was unstable maybe...
Here is more data, including some pretty impressive NPS values: :)
13-> 21.48 0.31 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
Rd8 Bc5 5. R8d4 Rxc2+ 6. Qxc2 Qxc2+
7. Kxc2 Bxd4 8. Bxd4 Be4+ 9. Kb3 Rd8
14 37.55 0.00 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
14-> 40.05 0.00 1. ... Kg8 2. Bxe5 Bf2 3. Bf6 Re2 4.
Rd8 Bh4 5. Rxf8+ Kxf8 6. Rd8+ Re8 7.
Rxe8+ Qxe8 8. Bxh4 Qe3+ 9. Kb1 Qg1+
10. Ka2 Qxg2 11. Qf4 Qxc2 12. Qxh6+
15 53.55 -- 1. ... Kg8
15 1:19 0.98 1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
4. Qxe5 Re8 5. Rg4+ Qxg4 6. Qxe8+ Kg7
7. Qe5+ f6 8. Qc7+ Kg6 9. Rd7 Qg5+
10. Kb1 Bxg2 11. Rg7+ Kf5 12. Rxg5+
hxg5
15-> 5:47 0.98 1. ... Kg8 2. Bxe5 Bf2 3. Rd4 Rxe5
4. Qxe5 Re8 5. Rg4+ Qxg4 6. Qxe8+ Kg7
7. Qe5+ f6 8. Qc7+ Kg6 9. Rd7 Qg5+
10. Kb1 Bxg2 11. Rg7+ Kf5 12. Rxg5+
hxg5 (s=2)
16 6:01 -- 1. ... Kg8
?
Black(0): ?
time=42:38 cpu=399% mat=-3 n=24914665031 fh=99% nps=9738k
ext-> chk=-1511772351 cap=11315993 pp=1103248 1rep=453745696
mate=1939426
predicted=0 nodes=24914665031 evals=780034205
endgame tablebase-> probes=0 hits=0
SMP-> split=219751 stop=8582 data=44/64 cpu=170:10 elap=42:38
Almost hit Dann's 10M nps on this quad 2.0 opteron box. :)
Note the Kg8 looks like it will take forever to resolve. I'll try an overnight
run tonight...
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.