Author: Tim Foden
Date: 09:29:21 09/21/03
Go up one level in this thread
On September 21, 2003 at 01:00:37, Paul Byrne wrote:
>I read the thread on the pawn game last night...
>http://www.talkchess.com/forums/1/message.html?316441
>
>...and added it as a variant to Guildenstern (which is pretty basic
>as chess engines go, but is set up to handle rules variations like
>this -- first version took about 10 minutes). The first version
>called it a win when a pawn hit the 7th rank; changing this to
>getting a passed pawn more advanced than the opponent's most advanced
>pawn (passed or not) caused a speedup of about 100x in solving the
>couple of test positions I was using.
>
>Anyways, to give you an idea how solvable this game is or isn't,
>I left it running on this position last night:
>
>[D]8/1pppppp1/8/p6p/P6P/8/1PPPPPP1/8 w - - 0 3
>
>with this result:
>
>mv=g4 e=12 d=1 n=14 t=0.000
>mv=f4 e=0 d=2 n=104 t=0.000
>mv=f4 e=12 d=3 n=371 t=0.002
>mv=f4 e=0 d=4 n=870 t=0.002
>mv=f4 e=12 d=5 n=2859 t=0.006
>mv=f4 e=-7 d=6 n=7296 t=0.013
>mv=f4 e=12 d=7 n=17061 t=0.028
>mv=f3 e=-4 d=8 n=56297 t=0.128
>mv=f4 e=19 d=9 n=152838 t=0.351
>mv=f4 e=-7 d=10 n=253530 t=0.586
>mv=e4 e=19 d=11 n=718726 t=1.473
>mv=e4 e=-2 d=12 n=1169031 t=2.114
>mv=e4 e=19 d=13 n=1875217 t=3.137
>mv=e4 e=-2 d=14 n=3304028 t=5.235
>mv=e4 e=16 d=15 n=6028707 t=9.264
>mv=e4 e=0 d=16 n=14889769 t=22.461
>mv=e4 e=28 d=17 n=116308613 t=168.791
>mv=e4 e=0 d=18 n=277650527 t=400.234
>mv=e4 e=27 d=19 n=493734227 t=706.427
>mv=e4 e=0 d=20 n=830582334 t=1181.929
>mv=e4 e=14 d=21 n=1572079524 t=2209.587
>mv=e4 e=0 d=22 n=-989389009 t=4577.107
>mv=e4 e=32 d=23 n=1675198974 t=8170.032
>mv=e4 e=273 d=24 n=1318190910 t=13610.508
>mv=e4 e=9969 d=25 n=-1677339015 t=26967.618
Does 9969 translate as a 'mate' in 16 [as (10000 - 9969 + 1) / 2 == 16]? Hmmm..
May still have a bug in my thing, as it thinks d4 (and therefore also e4) is
mate in 15 from this position.
And here is the PV... :)
28 29:40.7 +Mate15 1973m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
c3 7. bxc3 gxh4 8. f4 h3 9. gxh3 b5 10. e5 fxe5
11. d5 exd5 12. fxe5 b4 13. e6 bxc3 14. e7 c5
15. e8
Anyone else got a mate length or PV?
Cheers, Tim.
Analysis by modified GLC (AXP 1.67GHz)...
>hash 48
Hash table size set to: 48.0MB
>anal
Game stage: Endgame
Current eval: 0.000
Ply Time Score Nodes Principal variation
6 0.000 +0.000 6170 c4 c5 2. e4 e5 {ht}
7 0.010 +0.050 10384 c4 c5 2. e4 f5 3. exf5 e6 4. g4 hxg4
7 0.010 +0.050 15505 c4 c5 2. e4 f5 3. exf5 e6 4. g4 hxg4
8 0.030 +0.050 26016 c4 c5 2. e4 f5 3. exf5 e6 4. g4 hxg4
8 0.040 +0.050 35916 c4 c5 2. e4 f5 3. exf5 e6 4. g4 hxg4
9 0.060 +0.050 60519 c4 c5 2. e4 e5 3. g3 g6 4. f4 exf4 5. gxf4 f5
9 0.090 +0.050 84959 c4 c5 2. e4 e5 3. g3 g6 4. f4 exf4 5. gxf4 f5
10 0.150 +0.000 154583 c4 e5 2. e4 g6 3. b3 f5 4. exf5 gxf5 5. f4 exf4 6.
d4
10 0.350 +0.050 350054 c3 f5 2. b4 axb4 3. cxb4 e5 4. f4 exf4 5. e3 fxe3
6. dxe3 d5
10 0.360 +0.050 366560 c3 f5 2. b4 axb4 3. cxb4 e5 4. f4 exf4 5. e3 fxe3
6. dxe3 d5
11 0.600 +0.000 617450 c3 c5 2. f4 b6 3. b3 f5 4. g3 g6 5. d4 cxd4 6.
cxd4 d5
11 1.101 +0.050 1065531 d4 b6 2. f4 d5 3. b3 c5 4. e3 cxd4 5. exd4 f5 6.
c4 e6
11 1.101 +0.050 1065537 d4 b6 2. f4 d5 3. b3 c5 4. e3 cxd4 5. exd4 f5 6.
c4 e6
12 1.442 +0.050 1412782 d4 b6 2. c4 g6 3. f4 f5 4. g3 e6 5. b3 c5 6. dxc5
bxc5 {ht}
12 1.642 +0.050 1606765 d4 b6 2. c4 g6 3. f4 f5 4. g3 e6 5. b3 c5 6. dxc5
bxc5 {ht}
13 2.683 +0.050 2605363 d4 b6 2. c4 f5 3. b3 e6 4. d5 exd5 5. cxd5 g6 6.
f4 {ht}
13 3.054 +0.050 2961440 d4 b6 2. c4 f5 3. b3 e6 4. d5 exd5 5. cxd5 g6 6.
f4 {ht}
14 5.157 +0.050 4995653 d4 f5 2. c4 b6 {ht}
14 5.758 +0.050 5572696 d4 f5 2. c4 b6 {ht}
15 10.485 +0.050 10052k d4 d5 2. c3 b6 3. b4 c6 4. bxa5 bxa5 5. f3 f6 6.
g4 g6 7. gxh5 gxh5 8. f4 e6 9. e3
15 11.737 +0.050 11240k d4 d5 2. c3 b6 3. b4 c6 4. bxa5 bxa5 5. f3 f6 6.
g4 g6 7. gxh5 gxh5 8. f4 e6 9. e3
16 19.508 +0.100 18458k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. g4 g6 6. e3 e6
7. gxh5 gxh5 8. e4 dxe4 9. fxe4 f5
16 21.430 +0.100 20257k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. g4 g6 6. e3 e6
7. gxh5 gxh5 8. e4 dxe4 9. fxe4 f5
17 27.189 +0.050 25643k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. e4 e6 6. g3 g6
7. exd5 exd5 8. bxa5 bxa5 9. g4 hxg4 10. fxg4 g5
17 33.107 +0.050 31188k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. e4 e6 6. g3 g6
7. exd5 exd5 8. bxa5 bxa5 9. g4 hxg4 10. fxg4 g5
18 44.754 +0.100 42136k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. e4 e6 6. g3 g6
7. exd5 exd5 8. g4 f5 9. gxf5 gxf5 10. f4 axb4
11. cxb4
18 54.047 +0.100 50848k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. e4 e6 6. g3 g6
7. exd5 exd5 8. g4 f5 9. gxf5 gxf5 10. f4 axb4
11. cxb4
19 1:11.65 +0.100 67622k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. e4 g5 6. bxa5
bxa5 7. e5 gxh4 8. e6 f5 9. f4 h3 10. gxh3 h4
19 1:35.13 +0.100 89931k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. e4 g5 6. bxa5
bxa5 7. e5 gxh4 8. e6 f5 9. f4 h3 10. gxh3 h4
20 2:08.22 +0.200 121970k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. g4 g6 6. e3 f5
7. g5 f4 8. exf4 e6 9. f5 exf5 10. f4 axb4 11.
cxb4
20 2:36.35 +0.200 149024k d4 d5 2. c3 b6 3. b4 c6 4. f3 f6 5. g4 g6 6. e3 f5
7. g5 f4 8. exf4 e6 9. f5 exf5 10. f4 axb4 11.
cxb4
21 3:24.86 +0.150 196880k d4 d5 2. c3 e6 3. b3 f6 4. b4 axb4 5. cxb4 e5 6.
dxe5 fxe5 7. a5 c6 8. f3 d4 9. g3 g6 10. g4 hxg4
11. fxg4 c5 12. bxc5 e4
21 4:21.06 +0.150 251345k d4 d5 2. c3 e6 3. b3 f6 4. b4 axb4 5. cxb4 e5 6.
dxe5 fxe5 7. a5 c6 8. f3 d4 9. g3 g6 10. g4 hxg4
11. fxg4 c5 12. bxc5 e4
22 5:42.48 -0.050 332945k d4 d5 2. c3 e6 3. f3 f6 4. b4 axb4 5. cxb4 e5 6.
e3 g6 7. f4 e4 8. a5 c6 9. f5 gxf5 10. g3 f4 11.
a6 bxa6 12. gxf4
22 7:29.05 -0.050 438184k d4 d5 2. c3 e6 3. f3 f6 4. b4 axb4 5. cxb4 e5 6.
e3 g6 7. f4 e4 8. a5 c6 9. f5 gxf5 10. g3 f4 11.
a6 bxa6 12. gxf4
23 8:25.83 +0.350 497320k d4 {++} d5 2. c3 e6 3. f3 f6 4. e3 e5 5. f4 exd4
6. exd4 g6 7. b4 axb4 8. cxb4 b6 9. g3 b5 10. a5
c6 11. a6 c5 12. dxc5 g5 13. hxg5
23 9:47.75 +4.546 581236k d4 d5 2. c3 e6 3. f3 f6 4. e3 b6 5. g4 c6 6. b4 g6
7. gxh5 gxh5 8. e4 dxe4 9. fxe4 f5 10. b5 cxb5
11. d5 fxe4 12. dxe6 bxa4
23 10:42.3 +4.546 634511k d4 d5 2. c3 e6 3. f3 f6 4. e3 b6 5. g4 c6 6. b4 g6
7. gxh5 gxh5 8. e4 dxe4 9. fxe4 f5 10. b5 cxb5
11. d5 fxe4 12. dxe6 bxa4
24 12:32.2 +4.398 749800k d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 b5 8. d5 exd5 9. e5 fxe5 10. fxe5 c3
11. bxc3 bxa4 12. e6 a3
24 14:03.5 +4.398 840502k d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 b5 8. d5 exd5 9. e5 fxe5 10. fxe5 c3
11. bxc3 bxa4 12. e6 a3
25 15:45.2 +4.766 951333k d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 b5 8. d5 exd5 9. e5 fxe5 10. fxe5 c3
11. bxc3 h3 12. gxh3 d4 13. e6 dxc3
25 17:54.1 +4.766 1085m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 b5 8. d5 exd5 9. e5 fxe5 10. fxe5 c3
11. bxc3 h3 12. gxh3 d4 13. e6 dxc3
26 19:51.1 +4.598 1217m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
c3 7. bxc3 gxh4 8. f4 b5 9. d5 exd5 10. e5 fxe5
11. fxe5 h3 12. gxh3 bxa4 13. e6 a3
26 21:55.8 +4.598 1352m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
c3 7. bxc3 gxh4 8. f4 b5 9. d5 exd5 10. e5 fxe5
11. fxe5 h3 12. gxh3 bxa4 13. e6 a3
27 23:20.2 +4.998 1450m d4 {++} d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4
6. e4 gxh4 7. f4 c3 8. bxc3 b5 9. d5 exd5 10. e5
fxe5 11. fxe5 h3 12. gxh3 d4 13. e6 dxc3 14. e7
c6 15. axb5
27 25:23.6 +Mate15 1617m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 b5 8. e5 fxe5 9. d5 exd5 {ht}
27 27:30.3 +Mate15 1796m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 b5 8. e5 fxe5 9. d5 exd5 {ht}
28 29:40.7 +Mate15 1973m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
c3 7. bxc3 gxh4 8. f4 h3 9. gxh3 b5 10. e5 fxe5
11. d5 exd5 12. fxe5 b4 13. e6 bxc3 14. e7 c5
15. e8
28 32:02.3 +Mate15 2177m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
c3 7. bxc3 gxh4 8. f4 h3 9. gxh3 b5 10. e5 fxe5
11. d5 exd5 12. fxe5 b4 13. e6 bxc3 14. e7 c5
15. e8
29 34:17.2 +Mate15 2365m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 c3 8. bxc3 h3 9. gxh3 b5 10. e5 fxe5
11. d5 exd5 12. fxe5 bxa4 13. e6 c5 14. e7 a3
15. e8
29 36:47.3 +Mate15 2597m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
gxh4 7. f4 c3 8. bxc3 h3 9. gxh3 b5 10. e5 fxe5
11. d5 exd5 12. fxe5 bxa4 13. e6 c5 14. e7 a3
15. e8
Analyse>exit
local: t=36:50.9 nps=1177293.1 n=2602876169 (80.7% / 19.3%)
total: t=36:50.9 nps=1177293.1 n=2602876169
stats: fh=88.1%/7.96%/2.710% draws=62496
trans: probes=1803213663 hits=471454228 (26.15%) draft=407145638 (22.58%)
tcuts: exact=2557 (0.00%) upper=210131345 (11.65%) lower=187729932 (10.41%)
tstor: exact=6421 (0.00%) upper=997641740 (70.99%) lower=407701639 (29.01%)
ext: check=0 recap=69882230 ppush=267022499 1rep=0 thrt=0
q-moves: gen=34971951 tested=31671235 made/un=5289513 max-dep=9
max eval diff: part-1=11.379 part-2=0.000
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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