Author: Tim Foden
Date: 07:52:52 05/06/05
Go up one level in this thread
On May 05, 2005 at 20:17:23, Dann Corbit wrote:
>On May 05, 2005 at 18:43:00, Jonathan Kreuzer wrote:
>
>>This isn't for guaranteed shortest mates, but for general mate finding I use
>>Slow Chess, because it's my program =) and Ruffian 1.01. Ruffian can't seem to
>>find this specific one though, because it uses null-move more aggressively in
>>endgames than Slow Chess. I find it's good to try a few different programs,
>>since solve times can vary greatly by program between positions.
>>
>>Slow Chess takes about 1 second to find Mate in 7 on a AMD 2700+
>>
>>SlowChess Blitz WV (22 MB hash)
>>FEN: 8/5K2/8/R7/8/5R2/6np/6kr w - -
>>
>>[9] M7 00:01.2 Ra8 Ne1 Rg8+ Ng2 Kg6 Nh4+ Kh5+ Ng2 Kg4 Ne1 Kh3+ Ng2 Rxg2+
>>#mate
>>[8] M7 00:01.1 Ra8 Ne1 Rg8+ Ng2 Kg6 Nh4+ Kh5+ Ng2 Kg4 Ne1 Kh3+ Ng2 Rxg2+
>>#mate
>>[8] 4.40 00:01.1 Ra8 {++}
>>[8] 4.40 00:00.6 Ra1+
>>[8] 4.28 00:00.6 Ra1+ {++}
>>[8] 4.28 00:00.4 Kf6 Ne1 Rg5+ Ng2 Rfg3 Kf2 Rxg2+ Kf3 R5g3+ Ke4 Re2+ Kf4 Rg7
>>[7] 4.08 00:00.3 Kf6 Ne1 Rg5+ Ng2 Rfg3 Kf2 Rxg2+ Kf3 R5g3+ Ke4 Rg7
>>[7] 3.92 00:00.3 Kf6 {++}
>>[7] 3.92 00:00.1 Ke6 Ne3 Rg5+ Ng2 Rc3 Kf1 Rf5+ Nf4+ Rxf4+ Kg2 Rg4+ Kf2 Kd5
>>[6] 3.68 00:00.0 Ke6 Ne3 Rg5+ Ng2 <tt>
>>[5] 3.68 00:00.0 Ke6 Ne1 Rg5+ Ng2 Rfg3 Kf2 Rxg2+ Kf3
>>[4] 0.44 00:00.0 Ke6 Ne1 Rg5+ Ng2 Rg7
>>[4] 0.00 00:00.0 Ke6 {++}
>>[4] 0.00 00:00.0 Ra1+ Ne1 Rxe1+ Kg2 Ree3 Rf1 Rxf1 Kxf1
>>[3] 2.60 00:00.0 Ra1+ Ne1 Rxe1+ Kg2 Ree3 Rf1
>>[2] 3.00 00:00.0 Ra1+ Ne1 Rxe1+ Kg2 Ree3
>
>That is a very impressive result. I will have to put it into my standard pile
>of engines to throw at problems.
GLC can't beat this, but it does well compared to some of the results you posted
Dann...
GLC 3.01.2.2, 24MB Hash, AXP 2.08 GHz: #7 in 16.1 seconds...
>anal
Game stage: Endgame
Current eval: -0.014
Ply Time Score Nodes Principal variation
Generating internal KP-K end-game table...
Done (0.150 secs)
4 0.170 +3.619 9352 Ra1+ Ne1 2. Rxe1+ Kg2 3. Ree3 Rg1 4. Rg3+ Kf2 5.
Ref3+ Ke2
4 0.170 +3.619 9735 Ra1+ Ne1 2. Rxe1+ Kg2 3. Ree3 Rg1 4. Rg3+ Kf2 5.
Ref3+ Ke2
5 0.180 +3.806 28240 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3
5 0.180 +3.876 31021 Ke6 Ne1 2. Rg5+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3
5 0.180 +3.876 36192 Ke6 Ne1 2. Rg5+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3
6 0.180 +3.911 38301 Ke6 Ne1 2. Rg5+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
R5g4
6 0.210 +3.911 90777 Ke6 Ne1 2. Rg5+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
R5g4
7 0.220 +3.805 107512 Ke6 Ne1 2. Rg5+ Ng2 3. Ra3 Kf1 4. Rf5+ Ke2 5. Ra2+
Kd3 6. Rxg2
7 0.270 +3.845 202131 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3 5.
Re6+ Kd4 6. Rge2
7 0.270 +3.845 217884 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3 5.
Re6+ Kd4 6. Rge2
8 0.290 +3.847 236811 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3 5.
R2g3+ Kd4 6. R3g4+ Kd3 {ht} 7. Ke7
8 0.370 +3.847 412069 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3 5.
R2g3+ Kd4 6. R3g4+ Kd3 {ht} 7. Ke7
9 0.400 +3.878 465436 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3 5.
R2g3+ Kd4 6. R6g4+ Ke5 7. Rg5+ Kd6 8. Kf6
9 0.561 +3.878 789286 Rf6 Ne1 2. Rg5+ Ng2 3. Rfg6 Kf2 4. Rxg2+ Ke3 5.
R2g3+ Kd4 6. R6g4+ Ke5 7. Rg5+ Kd6 8. Kf6
10 0.701 +4.011 1029700 Rf6 Nf4 2. Rxf4 Kg2 3. Rg5+ Kh3 4. Rf2 Kh4 5. Rgf5
Kg3 6. R5f3+ Kg4 7. Ke6
10 0.941 +4.011 1531338 Rf6 Nf4 2. Rxf4 Kg2 3. Rg5+ Kh3 4. Rf2 Kh4 5. Rgf5
Kg3 6. R5f3+ Kg4 7. Ke6
11 0.951 +4.411 1542339 Rf6 {++} Nf4 2. Rxf4 Kg2 3. Rg5+ Kh3 4. Rf2 Kh4 5.
Rg6 Kh3 6. Rf3+ Kh4 7. Rg2 Rg1 8. Rxh2+ Kg4
11 1.742 +5.067 3108614 Ra6 Nh4 2. Rb3 Nf3 3. Ra1+ Kg2 4. Rb2+ Kh3 5. Rxh1
Kg3 6. Ke6 Ng5+ {ht} 7. Ke5
11 1.752 +5.067 3117316 Ra6 Nh4 2. Rb3 Nf3 3. Ra1+ Kg2 4. Rb2+ Kh3 5. Rxh1
Kg3 6. Ke6 Ng5+ {ht} 7. Ke5
12 1.772 +5.467 3144657 Ra6 {++} Nh4 2. Rb3 Nf3 3. Ra1+ Kg2 4. Rb2+ Kh3 5.
Rxh1 Kg3 6. Ke6 Ng5+ 7. Ke5 Nf7+ 8. Kf6 Nd8 9.
Rhxh2
12 2.103 +5.583 3801929 Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Kd4 7. Rxh2 Rxh2 8. Rxh2 Kd5
12 2.834 +5.583 5323139 Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Kd4 7. Rxh2 Rxh2 8. Rxh2 Kd5
13 3.455 +5.579 6583281 Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Re1 7. Rg4+ Ke5 8. Rg5+ Ke4 9.
Rxh2 Re3
13 4.997 +5.579 9824450 Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Re1 7. Rg4+ Ke5 8. Rg5+ Ke4 9.
Rxh2 Re3
14 5.908 +5.616 11575k Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Rc1 7. Re2+ Kd3 8. Rd2+ Ke4 9.
Rge2+ Kf4 10. Rf2+ Ke5 11. Rxh2
14 8.923 +5.616 17482k Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Rc1 7. Re2+ Kd3 8. Rd2+ Ke4 9.
Rge2+ Kf4 10. Rf2+ Ke5 11. Rxh2
15 10.565 +5.694 20531k Ra6 Ne1 2. Rg6+ Ng2 3. Rfg3 Kf2 4. Rxg2+ Ke3 5.
Rf6 Ke4 6. Rff2 Rg1 7. Rxh2 Rg4 8. Ke6 Rg6+ 9.
Rf6 Rxf6+ 10. Kxf6 Kd4 11. Rd2+ Ke4
15 15.702 +6.016 30890k Ra8 {++} Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf6+ Ng2 5.
Kg5 Ne1 6. Kf4+ Ng2+ 7. Kg3 Ne1 8. Kh3+ Ng2 {ht}
9. Rxg2#
15 16.103 +Mate07 31886k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
15 16.133 +Mate07 31941k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
16 16.303 +Mate07 32342k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
16 17.265 +Mate07 34777k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
17 17.445 +Mate07 35229k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
17 18.997 +Mate07 39127k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
18 19.258 +Mate07 39777k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
18 21.441 +Mate07 45212k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
19 21.911 +Mate07 46428k Ra8 Ne1 2. Rg8+ Ng2 3. Kg6 Ne1 4. Kf5+ Ng2 5. Kg4
Ne1 6. Kh3+ Ng2 7. Rxg2#
Analyse>exit
local: t=22.332 nps=2124669.2 n=47448114 (45.8% / 54.2%)
total: t=22.332 nps=2124669.2 n=47448114
stats: fh=96.4%/1.72%/0.538% draws=124711
trans: probes=18001826 hits=7738686 (42.99%) draft=5604002 (31.13%)
tcuts: exact=1913 (0.01%) upper=2618631 (14.55%) lower=2764826 (15.36%)
tstor: exact=901 (0.03%) upper=1764972 (54.77%) lower=1456651 (45.20%)
ext: check=3382074 recap=28233 ppush=0 1rep=66590 thrt=195476
q-moves: gen=3631218 tested=3064027 made/un=621101 max-dep=5
max eval diff: part-1=2.628 part-2=1.128
Cheers, Tim.
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