Author: leonid
Date: 05:28:37 03/17/02
Go up one level in this thread
On March 17, 2002 at 05:54:26, Tim Foden wrote:
>On March 16, 2002 at 07:17:13, leonid wrote:
>
>>[D]3r4/1nkrnqqp/3b4/3qQQQQ/2bN2BB/1qN3QK/pR3QQ1/R3QQ2 w - -
>>
>>Please indicate your result.
>
>Hi Leonid,
Hi, Tim,
I actually don't know if your solution in 7 moves is real. It could be. My
problem is that on this position I had pretty bad branching factor, around 30.
So, when I look into this position (that was created somewhere in last Summer) I
see only that mate was searched 6 moves deep by brute force. With hash and on
more quick computer this position, for sure, could be searched easily 7 moves by
brute force.
9 moves selective took 23 seconds. Celeron 600Mhz. No hash.
>
>Green Light finds that Ndb5+ is a mate in 7 after 40.06 seconds.
>
>[Note: I worry that this is still showing a bug, as you don't seem to be posting
>such sort mates recently. :)]
It could be that you have as little time to look into your code as I have.
Already for good two months I wrote some new code that, presumably, should speed
my mate search. Last writing contain visible bugs. Now I am just unable to find
free week to go into full debugging.
Cheers,
Leonid.
>Cheers, Tim.
>
>Analysis (GLC2.18, Athlon XP1700+, 48MB hash):
>
>>anal
> Game stage: Opening
> Current eval: 49.043
> Ply Time Score Nodes Principal Variation
> 2 0.07 +58.862 6221 Qexg7 Qdxf5 {--}
> 2 0.07 +49.425 9215 Qexg7 Qxg2+ 2. Qgxg2 Qxg7
> 2 0.07 +58.863 9552 Nxd5+ Bxd5 2. Qexg7 {++}
> 2 0.08 +59.862 10299 Nxd5+ Bxd5 2. Qexg7 Bxg2+ 3. Q1xg2 Nxf5 4. Nxb3
> 2 0.10 +59.862 10507 Nxd5+ Bxd5 2. Qexg7 Bxg2+ 3. Q1xg2 Nxf5 4. Nxb3
> 3 0.20 +59.462 93701 Nxd5+ Bxd5 2. Qexg7 Bxg2+ 3. Q1xg2 Nxf5 {--}
> 3 0.23 +58.925 111225 Nxd5+ Bxd5 2. Rc1+ Kb8 3. Qexg7 Bxg2+ 4. Q1xg2 Qxg7
> 5. Nxb3
> 3 0.31 +58.925 176264 Nxd5+ Bxd5 2. Rc1+ Kb8 3. Qexg7 Bxg2+ 4. Q1xg2 Qxg7
> 5. Nxb3
> 4 0.94 +58.525 751317 Nxd5+ Bxd5 2. Rc1+ Kb8 3. Qexg7 Bxg2+ 4. Q1xg2 Nxf5
> {--}
> 4 1.20 +58.359 966077 Nxd5+ Bxd5 2. Qexd5 Qfxd5 3. Qfxd5 Qxb2 4. Qxb2
> Bxg3 5. Qxg7 Rxd5 6. Bxg3+
> 4 1.54 +58.359 1298367 Nxd5+ Bxd5 2. Qexd5 Qfxd5 3. Qfxd5 Qxb2 4. Qxb2
> Bxg3 5. Qxg7 Rxd5 6. Bxg3+
> 5 1.79 +58.759 1500348 Nxd5+ Bxd5 2. Qexd5 Qfxd5 3. Qxb3 Nxf5 4. Qgxd5
> {++}
> 5 3.15 +60.390 2732941 Nxd5+ Qxd5 2. Qexd5 Qxg3+ 3. Bxg3 Bxd5 4. Bxd6+
> Rxd6 5. Qexe7+ Qxe7 6. Qxe7+ R6d7
> 5 7.11 +60.390 6418746 Nxd5+ Qxd5 2. Qexd5 Qxg3+ 3. Bxg3 Bxd5 4. Bxd6+
> Rxd6 5. Qexe7+ Qxe7 6. Qxe7+ R6d7
> 6 7.29 +60.790 6518798 Nxd5+ Qxd5 2. Qexd5 Qxg3+ 3. Bxg3 Bxd5 4. Bxd6+
> Rxd6 5. Nb5+ Kc6 6. Rc1+ Nc5 7. Rxc5+ Kb6 8.
> Nxd6+ {++}
> 6 14.09 +67.813 12926k Nxd5+ Qxd5 2. Qxd6+ Rxd6 3. Qexe7+ Qxe7 4. Qxe7+
> Kb6 5. Nxb3+ Nc5 6. Nxc5+ Kc6 7. Qgxd5+ Rxd5
> 6 26.79 +73.116 24279k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Nxd6+ Kb8 6. Qexd5 Qxh5 7. Bxh5 Qxc3 8. Rxc3
> Rxd6 9. Rxc6
> 6 36.38 +73.116 34092k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Nxd6+ Kb8 6. Qexd5 Qxh5 7. Bxh5 Qxc3 8. Rxc3
> Rxd6 9. Rxc6
> 7 36.54 +73.516 34222k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Nxd6+ Kb8 6. Rxb7+ Rxb7 7. Qxd8+ Nxd8 {ht}
> {++}
> 7 40.09 +Mate07 40249k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 7 49.34 +Mate07 56317k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 8 1:01 +Mate07 75847k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 8 1:28 +Mate07 121227k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 9 1:60 +Mate07 171972k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 9 4:34 +Mate07 437006k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 10 6:08 +Mate07 600308k Ndb5+ Bxb5 2. Nxb5+ Kc8 3. Rc1+ Qc3 4. Qe1xc3+ Nc6
> 5. Qxc6+ Qxc6 6. Qxc6+ Kb8 7. Qa7#
> 10 9:23 4/94 Qxd6+ >exit
> local: t=9:29 nps=1675156.8 n=952775554 (22.5% / 77.5%) fh=95.8%
> total: t=9:29 nps=1675156.8 n=952775554 draws=20789
> trans: probes=65302496 hits=6139216 (9.40%) draft=4043726 (6.19%)
> tcuts: exact=91 (0.00%) upper=2018837 (3.09%) lower=1854448 (2.84%)
> tstor: exact=662 (0.00%) upper=23273107 (69.37%) lower=10273484 (30.62%)
> ext: check=99211808 recap=697508 ppush=0 1rep=1528110 thrt=0
> q-moves: gen=58508721 tested=7789580 made/un=3903284 max-dep=10
> max eval diff: part-1=2.284 part-2=2.982
>>
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