Author: Tony Werten
Date: 00:50:58 05/20/03
Go up one level in this thread
On May 20, 2003 at 02:17:14, Tim Foden wrote:
>On May 19, 2003 at 23:46:58, Will Singleton wrote:
>
>>I was trying to figure out why my latest build doesn't do quite as well on
>>ecm86, and I ran Ruffian on it. To my surprise, Ruffian couldn't solve it, even
>>given 5 minutes. This is odd, since most other progs can do it in less than 10
>>seconds. (What I take away from this exercise is that my program must now be
>>stronger. Otherwise, I'd have to work on the problem, which is much less
>>interesting than testing new ideas.)
>>
>>[D]2r3k1/1nqbrp2/p5pp/1p1Pp1N1/8/1P5P/P1B2PP1/2RQR1K1 w - -
>
>I would assume then (from running Green Light), that Nxf7 is the correct move
>here?
>
>The PV is interesting as it contains 9 captures in a row at the start of the PV.
> Maybe ruffian is pruning if there are more than a certain number of captures in
>a row (as this is very unlikely to be a good thing).
My guess is that Ruffian is a preprocessor, which can't handle 9 captures
because the position is so different ( root position compared to leaf position )
There is a good chance Fritz 5.32 will show the same beheavior.
Tony
>
>Cheers, Tim.
>
>Analysis: GLC3.00, AXP 1.47GHz, 24MB Hash:
>
> Game stage: Middle game
> Current eval: 0.564
> Ply Time Score Nodes Principal variation
> 4 0.000 +0.743 5646 Ne4 Qb6 2. Qd2 g5
> 5 0.010 +0.592 13917 Ne4 Nd6 2. Nf6+ Kg7 3. Qf3 Kh8
> 5 0.020 +0.592 21231 Ne4 Nd6 2. Nf6+ Kg7 3. Qf3 Kh8
> 6 0.060 +0.702 54001 Ne4 Qb6 2. Qd2 g5 3. Qb4 Nc5
> 6 0.070 +0.702 66151 Ne4 Qb6 2. Qd2 g5 3. Qb4 Nc5
> 7 0.200 +0.709 159535 Ne4 Qb6 2. Bd3 Ree8 3. Qd2 g5 4. Nc3
> 7 0.310 +1.102 263663 Nxf7 {++} Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+
> Kxf7 5. Rxc1
> 7 0.360 +1.745 307058 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1
> 7 0.370 +1.745 316180 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1
> 8 0.440 +1.345 388531 Nxf7 {--} Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+
> Kxf7 5. Rxc1 Nd6
> 8 0.530 +1.186 460490 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6
> 8 0.580 +1.186 527044 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6
> 9 0.841 +1.259 749293 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7
> 9 1.081 +1.259 966741 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7
> 10 1.712 +1.299 1514631 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke7
> 10 2.093 +1.299 1853467 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke7
> 11 3.985 +1.340 3477228 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke7 7. g4
> 11 5.377 +1.340 4753269 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke7 7. g4
> 12 8.251 +1.405 7132424 Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8
> 12 11.666 +1.405 10151k Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8
> 13 19.798 +1.603 16605k Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8 8. Rc7
> 13 25.416 +1.603 21432k Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8 8. Rc7
> 14 40.958 +1.591 33530k Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8 8. Rh7 Nf7
> 14 58.534 +1.591 49298k Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8 8. Rh7 Nf7
> 15 1:50.67 +1.731 89853k Nxf7 Rxf7 2. Bxg6 Qxc1 3. Qxc1 Rxc1 4. Bxf7+ Kxf7
> 5. Rxc1 Nd6 6. Rc7 Ke8 7. Ra7 Bc8 8. Rh7 Nf7 9.
> Rg7
>Analyse>exit
> local: t=2:08.16 nps=823272.7 n=105513924 (19.4% / 80.6%)
> total: t=2:08.16 nps=823272.7 n=105513924
> stats: fh=92.6%/3.32%/1.144% draws=27498
> trans: probes=20409495 hits=2716707 (13.31%) draft=1695895 (8.31%)
> tcuts: exact=194 (0.00%) upper=762653 (3.74%) lower=739551 (3.62%)
> tstor: exact=177 (0.00%) upper=4357058 (62.62%) lower=2600548 (37.38%)
> ext: check=2656717 recap=312992 ppush=163771 1rep=165677 thrt=0
> q-moves: gen=95505010 tested=42689594 made/un=16616552 max-dep=13
> max eval diff: part-1=3.320 part-2=2.724
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