Author: Dann Corbit
Date: 12:54:52 10/10/01
Go up one level in this thread
On October 10, 2001 at 15:31:17, Dann Corbit wrote:
>On October 10, 2001 at 09:23:21, Tim Foden wrote:
>
>>On October 09, 2001 at 13:01:13, Uri Blass wrote:
>>
>>>[D]8/1P6/8/5k2/2K4p/7r/1r4p1/6R1 b - - 0 61
>>>
>>>This position is from the game Tao-Deep Junior7 in the last WMCCC
>>>
>>>Chest need some hours on p200 to see mate in 10(I used chest by the way that was
>>>explained by paul some days ago
>>>
>>>see http://www.icdchess.com/forums/1/message.shtml?191857
>>>
>>>Solution:61...Rg3 62.Kd4 h3 63.Kd5 h2 64.b8Q Rxb8 65.Re1 Rd3+ 66.Kc4 h1Q 67.Re5+
>>>Kxe5 68.Kxd3 Qd1+ 69.Kc3 Rb3+ 70.Kc4 Qc2#
>>>
>>>15961 seconds,292,407,791 nodes
>>
>>Green Light Chess (96MB Hash, 920MHz Duron, no tablebases) claims that Rg3 is a
>>mate in 11 after 2 mins 30 secs, and that it is a mate in 10 after 4 mins 59
>>secs. Finally it finds a different line for mate in 10 after 7 mins 56 secs.
>>
>> 14 2:30 +Mate11 118131k Rg3 2. Kc5 h3 3. b8=Q Rxb8 4. Rd1 g1=Q+ 5. Rxg1
>> Rxg1 6. Kd4 h2 7. Kc4 h1=Q 8. Kd4 Rd1+ 9. Ke3
>> Re8+ 10. Kf2 Rd2+ 11. Kg3 Rg8#
>> 15 4:59 +Mate10 236044k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kd6 h2 5. Ra1 g1=Q 6.
>> Ra5+ Kf6 7. Ra6 Rb6+ 8. Kc7 Rxa6 9. Kd7 Rg7+ 10.
>> Kd8 Ra8#
>> 16 7:56 +Mate10 388591k Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
>> Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
>> Ka4 Qa2#
>>
>>Does chest agree with these as possible mates in 10?
>>
>>Cheers, Tim.
>>
>>Full analysis follows:
>>
>>>hash 96
>> Hash table size set to: 96.0MB
>>>anal
>> Game stage: Endgame
>> Current eval: 7.02
>> Ply Time Score Nodes Principal Variation
>> 5 0.07 +9.237 5257 Rg3 2. Kc5 Rxb7 3. Kc6 Rb4
>> 6 0.07 +9.216 7400 Rg3 2. Kc5 Rxb7 3. Kc6 Re7 4. Kc5
>> 6 0.07 1/28 Rhb3 >
>> 6 0.52 +9.216 13237 Rg3 2. Kc5 Rxb7 3. Kc6 Re7 4. Kc5
>> 7 0.52 ++ 16302 Rg3 (a=8.82 b=9.62 e=9.62)
>> 7 0.57 +11.125 54126 Rg3 2. Kd5 h3 3. Re1 g1=Q 4. Rxg1 Rxg1
>> 7 0.59 +11.125 61749 Rg3 2. Kd5 h3 3. Re1 g1=Q 4. Rxg1 Rxg1
>> 8 0.65 -- 99828 Rg3 (a=10.73 b=11.53 e=10.73)
>> 8 0.73 ++ 150736 Rg3 (a=-321.00 b=10.73 e=10.73)
>> 8 0.85 +12.150 246506 Rg3 2. Kd5 h3 3. Re1 Rxb7 4. Kc6 h2 5. Kxb7 g1=Q
>> 8 0.86 +12.150 246550 Rg3 2. Kd5 h3 3. Re1 Rxb7 4. Kc6 h2 5. Kxb7 g1=Q
>> 9 0.95 -- 318508 Rg3 (a=11.75 b=12.55 e=11.75)
>> 9 0.99 ++ 347299 Rg3 (a=-321.00 b=11.75 e=11.75)
>> 9 1.29 +12.938 581774 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6
>> Rgb1 6. Kd5
>> 9 1.30 +12.938 581818 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6
>> Rgb1 6. Kd5
>> 10 1.48 -- 717414 Rg3 (a=12.54 b=13.34 e=12.54)
>> 10 1.56 ++ 774881 Rg3 (a=-321.00 b=12.54 e=12.54)
>> 10 2.43 +15.721 1453651 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6 h3
>> 6. Kxb7 h2 7. Kc6 h1=Q+
>> 10 2.44 +15.721 1453695 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6 h3
>> 6. Kxb7 h2 7. Kc6 h1=Q+
>> 11 2.75 -- 1713315 Rg3 (a=15.32 b=16.12 e=15.32)
>> 11 2.92 ++ 1831695 Rg3 (a=-321.00 b=15.32 e=15.32)
>> 11 3.92 +15.868 2607802 Rg3 2. Ra1 Rxb7 3. Kc5 h3 4. Rg1 Rgb3 5. Kd4 h2 6.
>> Rxg2 R3b4+ 7. Ke3 h1=Q
>> 11 3.93 +15.868 2607846 Rg3 2. Ra1 Rxb7 3. Kc5 h3 4. Rg1 Rgb3 5. Kd4 h2 6.
>> Rxg2 R3b4+ 7. Ke3 h1=Q
>> 12 5.08 ++ 3220008 Rg3 (a=15.47 b=16.27 e=16.27)
>> 12 10.67 +18.823 7414915 Rg3 2. Kd5 h3 3. b8=Q Rxb8 4. Re1 g1=Q 5. Re5+ Kf4
>> 6. Re4+ Kf3 7. Rc4 Rg5+ 8. Kd6 h2 9. Rc3+ Kg2
>> 12 10.93 +18.823 7627692 Rg3 2. Kd5 h3 3. b8=Q Rxb8 4. Re1 g1=Q 5. Re5+ Kf4
>> 6. Re4+ Kf3 7. Rc4 Rg5+ 8. Kd6 h2 9. Rc3+ Kg2
>> 13 12.93 -- 9327296 Rg3 (a=18.42 b=19.22 e=18.42)
>> 13 14.78 ++ 10595k Rg3 (a=-321.00 b=18.42 e=18.42)
>> 13 45.94 +21.711 33205k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kc6 h2 5. Rxg2 Rxg2
>> 6. Kd6 {ht}
>> 13 45.94 +21.711 33205k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kc6 h2 5. Rxg2 Rxg2
>> 6. Kd6 {ht}
>> 14 49.80 -- 36528k Rg3 (a=21.31 b=22.11 e=21.31)
>> 14 54.88 ++ 40167k Rg3 (a=-321.00 b=21.31 e=21.31)
>> 14 2:30 +Mate11 118131k Rg3 2. Kc5 h3 3. b8=Q Rxb8 4. Rd1 g1=Q+ 5. Rxg1
>> Rxg1 6. Kd4 h2 7. Kc4 h1=Q 8. Kd4 Rd1+ 9. Ke3
>> Re8+ 10. Kf2 Rd2+ 11. Kg3 Rg8#
>> 14 2:30 +Mate11 118131k Rg3 2. Kc5 h3 3. b8=Q Rxb8 4. Rd1 g1=Q+ 5. Rxg1
>> Rxg1 6. Kd4 h2 7. Kc4 h1=Q 8. Kd4 Rd1+ 9. Ke3
>> Re8+ 10. Kf2 Rd2+ 11. Kg3 Rg8#
>> 15 2:33 -- 121106k Rg3 (a=320.98 b=321.00 e=320.98)
>> 15 3:05 ++ 146309k Rg3 (a=-321.00 b=320.98 e=320.98)
>> 15 4:59 +Mate10 236044k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kd6 h2 5. Ra1 g1=Q 6.
>> Ra5+ Kf6 7. Ra6 Rb6+ 8. Kc7 Rxa6 9. Kd7 Rg7+ 10.
>> Kd8 Ra8#
>> 15 4:59 +Mate10 236044k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kd6 h2 5. Ra1 g1=Q 6.
>> Ra5+ Kf6 7. Ra6 Rb6+ 8. Kc7 Rxa6 9. Kd7 Rg7+ 10.
>> Kd8 Ra8#
>> 16 5:13 -- 248451k Rg3 (a=320.98 b=321.00 e=320.98)
>> 16 7:06 ++ 334637k Rg3 (a=-321.00 b=320.98 e=320.98)
>> 16 7:56 +Mate10 388591k Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
>> Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
>> Ka4 Qa2#
>> 16 7:56 +Mate10 388591k Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
>> Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
>> Ka4 Qa2#
>> 17 9:12 -- 455126k Rg3 (a=320.98 b=321.00 e=320.98)
>> 17 12:39 ++ 625746k Rg3 (a=-321.00 b=320.98 e=320.98)
>> 17 12:49 0/28 Rg3 >exit
>> local: t=12:51 nps=823134.8 n=634776023 (28.9% / 71.1%) fh=94.3%
>> total: t=12:51 nps=823134.8 n=634776023 draws=786622
>> trans: probes=157466652 hits=50262459 (31.92%) draft=39200352 (24.89%)
>> tcuts: exact=26821 (0.02%) upper=27122632 (17.22%) lower=4408899 (2.80%)
>> tstor: exact=21775 (0.03%) upper=66184235 (79.86%) lower=16671234 (20.12%)
>> ext: check=88835236 recap=173709 ppush=1582950 1rep=6413384 thrt=0
>> q-moves: gen=15390981 tested=11156920 made/un=4609839 max-dep=9
>> max eval diff: part-1=4.798 part-2=1.402
>>>
>
>That's a truly astonishing result! Finding the closest mate faster than a
>dedicated mate solver. It seems if GLC can work itself into an advantageous
>position, it can really exploit it.
It seems that hash helps this problem a lot. Increasing the hash lead to
correct solution in about 4 minutes on a machine about the same speed as yours.
It seems that you cannot increase the hash above 192 Megs.
I also notice that there is no way to add in tablebase files. The reason seems
clear -- you don't need 'em!
;-)
>hash 300
Hash table size set to: 192.0MB
>epd 999 \m10.epd m10.out
Line 001: Test [Rg3]...
>
Game stage: Endgame
Current eval: 7.02
Ply Time Score Nodes Principal Variation
5 0.01 +9.237 5257 Rg3 2. Kc5 Rxb7 3. Kc6 Rb4
6 0.01 +9.216 7400 Rg3 2. Kc5 Rxb7 3. Kc6 Re7 4. Kc5
6 0.02 +9.216 13237 Rg3 2. Kc5 Rxb7 3. Kc6 Re7 4. Kc5
7 0.02 ++ 16302 Rg3 (a=8.82 b=9.62 e=9.62)
7 0.07 +11.125 54126 Rg3 2. Kd5 h3 3. Re1 g1=Q 4. Rxg1 Rxg1
7 0.08 +11.125 61749 Rg3 2. Kd5 h3 3. Re1 g1=Q 4. Rxg1 Rxg1
8 0.12 -- 99828 Rg3 (a=10.73 b=11.53 e=10.73)
8 0.18 ++ 150736 Rg3 (a=-321.00 b=10.73 e=10.73)
8 0.29 +12.150 246558 Rg3 2. Kd5 h3 3. Re1 Rxb7 4. Kc6 h2 5. Kxb7 g1=Q
8 0.29 +12.150 246602 Rg3 2. Kd5 h3 3. Re1 Rxb7 4. Kc6 h2 5. Kxb7 g1=Q
9 0.37 -- 318560 Rg3 (a=11.75 b=12.55 e=11.75)
9 0.41 ++ 347351 Rg3 (a=-321.00 b=11.75 e=11.75)
9 0.68 +12.938 582106 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6
Rgb1 6. Kd5
9 0.68 +12.938 582150 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6
Rgb1 6. Kd5
10 0.82 -- 717746 Rg3 (a=12.54 b=13.34 e=12.54)
10 0.91 ++ 775221 Rg3 (a=-321.00 b=12.54 e=12.54)
10 1.69 +15.721 1454020 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6 h3
6. Kxb7 h2 7. Kc6 h1=Q+
10 1.69 +15.721 1454064 Rg3 2. Ra1 Rxb7 3. Kc5 g1=Q+ 4. Rxg1 Rxg1 5. Kc6 h3
6. Kxb7 h2 7. Kc6 h1=Q+
11 1.96 -- 1713613 Rg3 (a=15.32 b=16.12 e=15.32)
11 2.11 ++ 1832082 Rg3 (a=-321.00 b=15.32 e=15.32)
11 3.01 +15.868 2608267 Rg3 2. Ra1 Rxb7 3. Kc5 h3 4. Rg1 Rgb3 5. Kd4 h2 6.
Rxg2 R3b4+ 7. Ke3 h1=Q
11 3.01 +15.868 2608311 Rg3 2. Ra1 Rxb7 3. Kc5 h3 4. Rg1 Rgb3 5. Kd4 h2 6.
Rxg2 R3b4+ 7. Ke3 h1=Q
12 3.84 ++ 3220952 Rg3 (a=15.47 b=16.27 e=16.27)
12 8.75 +18.823 7414821 Rg3 2. Kd5 h3 3. b8=Q Rxb8 4. Re1 g1=Q 5. Re5+ Kf4
6. Re4+ Kf3 7. Rc4 Rg5+ 8. Kd6 h2 9. Rc3+ Kg2
12 8.97 +18.823 7627348 Rg3 2. Kd5 h3 3. b8=Q Rxb8 4. Re1 g1=Q 5. Re5+ Kf4
6. Re4+ Kf3 7. Rc4 Rg5+ 8. Kd6 h2 9. Rc3+ Kg2
13 10.67 -- 9327803 Rg3 (a=18.42 b=19.22 e=18.42)
13 12.24 ++ 10589k Rg3 (a=-321.00 b=18.42 e=18.42)
13 39.25 +21.711 33115k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kc6 h2 5. Rxg2 Rxg2
6. Kd6 {ht}
13 39.25 +21.711 33115k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kc6 h2 5. Rxg2 Rxg2
6. Kd6 {ht}
14 42.64 -- 36367k Rg3 (a=21.31 b=22.11 e=21.31)
14 47.02 ++ 39879k Rg3 (a=-321.00 b=21.31 e=21.31)
14 2:07 +Mate11 114305k Rg3 2. Kc5 h3 3. b8=Q Rxb8 4. Rd1 g1=Q+ 5. Rxg1
Rxg1 6. Kd4 h2 7. Kc4 h1=Q 8. Kd4 Rd1+ 9. Ke3
Re8+ 10. Kf2 Rd2+ 11. Kg3 Rg8#
14 2:07 +Mate11 114305k Rg3 2. Kc5 h3 3. b8=Q Rxb8 4. Rd1 g1=Q+ 5. Rxg1
Rxg1 6. Kd4 h2 7. Kc4 h1=Q 8. Kd4 Rd1+ 9. Ke3
Re8+ 10. Kf2 Rd2+ 11. Kg3 Rg8#
15 2:09 -- 117087k Rg3 (a=320.98 b=321.00 e=320.98)
15 2:34 ++ 139315k Rg3 (a=-321.00 b=320.98 e=320.98)
15 4:09 +Mate10 224669k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kd6 h2 5. Ra1 g1=Q 6.
Ra5+ Kf6 7. Ra6 Rb6+ 8. Kc7 Rxa6 9. Kd7 Rg7+ 10.
Kd8 Ra8#
15 4:09 +Mate10 224670k Rg3 2. b8=Q Rxb8 3. Kc5 h3 4. Kd6 h2 5. Ra1 g1=Q 6.
Ra5+ Kf6 7. Ra6 Rb6+ 8. Kc7 Rxa6 9. Kd7 Rg7+ 10.
Kd8 Ra8#
16 4:21 -- 236288k Rg3 (a=320.98 b=321.00 e=320.98)
16 5:43 ++ 307438k Rg3 (a=-321.00 b=320.98 e=320.98)
16 6:31 +Mate10 363016k Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
Ka4 Qa2#
16 6:31 +Mate10 363016k Rg3 2. Kc5 h3 3. Kc6 h2 4. Rd1 g1=Q 5. Rd5+ Ke4 6.
Rb5 Rxb5 7. Kxb5 Qc1 8. Kb4 Qc2 9. b8=Q Rb3+ 10.
Ka4 Qa2#
17 7:26 -- 419750k Rg3 (a=320.98 b=321.00 e=320.98)
17 10:09 ++ 572042k Rg3 (a=-321.00 b=320.98 e=320.98)
local: t=16:39 nps=902743.0 n=901845641 (30.1% / 69.9%) fh=93.5%
total: t=16:39 nps=902743.0 n=901845641 draws=1129934
trans: probes=234253343 hits=78907662 (33.68%) draft=61531618 (26.27%)
tcuts: exact=58849 (0.03%) upper=40671501 (17.36%) lower=6509021 (2.78%)
tstor: exact=38983 (0.03%) upper=91258254 (79.15%) lower=23998614 (20.81%)
ext: check=121469999 recap=315717 ppush=2515585 1rep=7944271 thrt=0
q-moves: gen=43011618 tested=32110614 made/un=15682760 max-dep=9
max eval diff: part-1=5.794 part-2=1.402
!m Rh3-g3 320981 0 Rg3 >
move h3g30 0/28 Rg3 >
--------------------------------------------
8/1P6/8/5k2/2K4p/7r/1r4p1/6R1 b - - bm Rg3;
Line 001: Test [Rg3]: passed in 0.00 seconds [score=320.981]
Passed 1 out of 1 (0 invalid)
--------------------------------------------
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