Author: Mike Byrne
Date: 14:10:09 08/03/02
Go up one level in this thread
On July 31, 2002 at 16:23:18, Mike Byrne wrote:
>On July 31, 2002 at 16:14:56, Dann Corbit wrote:
>
>>From time to time, people will post messages about moves that no computer could
>>ever find. Or a famous chess player will shout "No computer can find this
>>move!"
>>Well, the move by Junior to sacrifice the rook is probably the most brilliant
>>and dramatic computer move ever made by a PC based program. Here is the
>>position, and 5000 second analysis by Crafty:
>>
>>[D]r1r5/3nbpk1/4qnp1/4p1Bp/1pN1P3/1PP2Q2/4N1PP/3R1R1K b - - acd 15; acn
>>-1478595477; acs 5002; ce -70; pv Ra6 cxb4 Bxb4 Nc1 Ra1 Nd3 Rxd1 Rxd1 Bc3 Nc5
>>Rxc5 Rd6 Qe8 Bxf6+ Nxf6 Qxf6+ Kg8 Kg1;
>>
<snip>
>
>
>Dann,
>
>I will be away for few days , I'll let Crafty 17.15 SEa ponder on this move
>while I'm gone - s/b back Saturday or Sunday with the long - good position!
>
>Adios,
>
>Mike
As promise , the log from Crafty 17.15SEa - although not with a convincing score
White(1): r1r5/3nbpk1/4qnp1/4p1Bp/1pN1P3/1PP2Q2/4N1PP/3R1R1K b - - acd 15; acn
Black(1): go
clearing hash tables
time surplus 0.00 time limit 100000:00 (100000:00)
nss depth time score variation (1)
starting thread 1
6-> 0.69 -0.41 1. ... Ra2 2. cxb4 Bxb4 3. Nc1 Rc2
4. Kg1 Ng4
7 1.19 -0.42 1. ... Ra2 2. cxb4 Bxb4 3. Nc1 Rc2
4. Ne3 Rd2 5. Rxd2 Bxd2
7-> 1.42 -0.42 1. ... Ra2 2. cxb4 Bxb4 3. Nc1 Rc2
4. Ne3 Rd2 5. Rxd2 Bxd2
8 2.09 -0.62 1. ... Ra2 2. cxb4 Bxb4 3. Nc1 Rc2
4. Nd3 Rc3 5. Ncxe5 Rxb3
8 5.22 -0.60 1. ... Rab8 2. cxb4 Bxb4 3. Rd3 Nh7
4. Be3 Nhf6 5. Kg1 Kg8
8 8.01 -0.55 1. ... Rcb8 2. cxb4 Bxb4 3. Nc1 Nh7
4. Bd2 Bxd2 5. Rxd2 Rd8
8 16.40 -0.50 1. ... Rc7 2. cxb4 Bxb4 3. Nc1 Nh7
4. Bh4 Kg8 5. Nd3 Bf8
(4) 8-> 16.83 -0.50 1. ... Rc7 2. cxb4 Bxb4 3. Nc1 Nh7
4. Bh4 Kg8 5. Nd3 Bf8
(3) 9 21.97 -0.84 1. ... Rc7 2. Ne3 Rxc3 3. Nxc3 bxc3
4. Rc1 Rc8 5. Nc4 Bb4 6. Rc2
(2) 9 27.37 -0.58 1. ... Rc6 2. Ng3 Rc7 3. cxb4 Bxb4
4. Rd3 Ng4 5. h3 Ngf6 6. Kg1
9 37.44 -0.57 1. ... Ra6 2. cxb4 Bxb4 3. Nc1 Kg8
4. Nd3 Bc3 5. Nf2 Bb4 6. Kg1
(3) 9-> 37.44 -0.57 1. ... Ra6 2. cxb4 Bxb4 3. Nc1 Kg8
4. Nd3 Bc3 5. Nf2 Bb4 6. Kg1
(2) 10 54.54 -0.44 1. ... Ra6 2. cxb4 Bxb4 3. Nc1 Bc5
4. Nd3 Nh7 5. Qg3 Nxg5 6. Qxg5 Bd4
10-> 56.79 -0.44 1. ... Ra6 2. cxb4 Bxb4 3. Nc1 Bc5
4. Nd3 Nh7 5. Qg3 Nxg5 6. Qxg5 Bd4
11 1:05 -0.62 1. ... Ra6 2. cxb4 Bxb4 3. Nc1 Rac6
4. Bxf6+ Nxf6 5. Nd3 Bc3 6. Nf2 Bb4
7. Kg1
11 5:36 -0.58 1. ... Bc5 2. cxb4 Bxb4 3. Nc1 Be7
4. Nd3 Ng4 5. Bxe7 Qxe7 6. h3 Ngf6
7. Kg1
(4) 11-> 6:10 -0.58 1. ... Bc5 2. cxb4 Bxb4 3. Nc1 Be7
4. Nd3 Ng4 5. Bxe7 Qxe7 6. h3 Ngf6
7. Kg1
(3) 12 7:03 -0.54 1. ... Bc5 2. cxb4 Bxb4 3. Nc1 Be7
4. Nd3 Ng4 5. Bxe7 Qxe7 6. Nf2 Ndf6
7. Kg1 Kg8 8. Nxg4 Nxg4
12 12:10 -0.49 1. ... Rab8 2. cxb4 Rxb4 3. Nc1 Rbb8
4. Kg1 Kg8 5. Ne2 Nc5 6. Nd2 Rc6 7.
Rc1 Rd8
12-> 12:35 -0.49 1. ... Rab8 2. cxb4 Rxb4 3. Nc1 Rbb8
4. Kg1 Kg8 5. Ne2 Nc5 6. Nd2 Rc6 7.
Rc1 Rd8
13 16:33 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Rd3 Kg8
4. Nc1 Rb5 5. Rfd1 Rc6 6. Rd5 Rbc5
7. Rxc5 Bxc5 8. Nd3
13-> 18:44 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Rd3 Kg8
4. Nc1 Rb5 5. Rfd1 Rc6 6. Rd5 Rbc5
7. Rxc5 Bxc5 8. Nd3
14 26:44 -0.41 1. ... Rab8 2. cxb4 Rxb4 3. Rd3 Rc6
4. Nc1 Nc5 5. Rd5 Nxb3 6. Rxe5 Qd7
7. Nxb3 Rbxc4 8. Rd1 Qe8
14-> 29:05 -0.41 1. ... Rab8 2. cxb4 Rxb4 3. Rd3 Rc6
4. Nc1 Nc5 5. Rd5 Nxb3 6. Rxe5 Qd7
7. Nxb3 Rbxc4 8. Rd1 Qe8
15 52:43 -0.52 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Rd3 Rc7 5. Rfd1 Ng4 6. Bxe7 Qxe7
7. h3 Ngf6 8. Rd6 Rc5 9. Kg1
(4) 15-> 98:32 -0.52 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Rd3 Rc7 5. Rfd1 Ng4 6. Bxe7 Qxe7
7. h3 Ngf6 8. Rd6 Rc5 9. Kg1
(3) 16 136:45 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Bxf6 Nxf6 5. Rd5 Nxd5 6. exd5 e4
7. Nxe4 Qf5 8. Qxf5 gxf5 9. Ned2 Kg7
10. Rxf5
(4) 16-> 227:13 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Bxf6 Nxf6 5. Rd5 Nxd5 6. exd5 e4
7. Nxe4 Qf5 8. Qxf5 gxf5 9. Ned2 Kg7
10. Rxf5
(3) 17 369:00 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Bxf6 Nxf6 5. Rd5 Nxd5 6. exd5 e4
7. Nxe4 Qf5 8. Qxf5 gxf5 9. Ned2 Kg7
10. Rxf5
(4) 17-> 492:33 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Bxf6 Nxf6 5. Rd5 Nxd5 6. exd5 e4
7. Nxe4 Qf5 8. Qxf5 gxf5 9. Ned2 Kg7
10. Rxf5
(3) 18 915:32 -0.47 1. ... Rab8 2. cxb4 Rxb4 3. Ng3 Kg8
4. Bxf6 Nxf6 5. Rd5 Nxd5 6. exd5 e4
7. Nxe4 Qf5 8. Qxf5 gxf5 9. Ned2 f4
10. Rxf4 Kg7
18 2523:38 -0.31 1. ... Rxc4 2. bxc4 b3 3. Nc1 Qxc4
4. Nxb3 Qxb3 5. Rxd7 Nxd7 6. Bxe7 Ra2
7. h4 Kg8 8. Rd1 Qe6 9. Bd8 Ra8 10.
Bg5 Ra2
(4) 18-> 2543:03 -0.31 1. ... Rxc4 2. bxc4 b3 3. Nc1 Qxc4
4. Nxb3 Qxb3 5. Rxd7 Nxd7 6. Bxe7 Ra2
7. h4 Kg8 8. Rd1 Qe6 9. Bd8 Ra8 10.
Bg5 Ra2
(3) 19 2843:46 -0.45 1. ... Rxc4 2. bxc4 b3 3. Nc1 Qxc4
4. Nxb3 Qxb3 5. Rxd7 Nxd7 6. Bxe7 Ra2
7. Rd1 Rc2 8. Qf1 Rf2 9. Qe1 Nf6 10.
Kg1 Qc2 11. Qxf2 Qxd1+
Black(0): ?
time=4337:05 cpu=34% mat=0 n=289854406K fh=1038% nps=1113K
ext-> checks=1810210369 recaps=978660502 pawns=406494553
ext-> 1rep=1071860524 thrt:106823076 pawn sac=677634835
predicted=0 nodes=2091597658 evals=67
endgame tablebase-> probes done=0 successful=0
SMP-> split=18235 stop=4739 data=13/64 cpu=8674:34
elap=4337:05
Black(1): Rxc4
time used: 4337:05
White(2): q
execution complete.
(note there may be something wrong with the print command for "nodes" although
the 289.854 billion "n"<nodes> does compute to a 1.113 million NPS for 4337:05
minutes) who knows, maybe normal Crafty might find it faster
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