Author: Dann Corbit
Date: 14:06:53 03/05/01
Go up one level in this thread
On March 05, 2001 at 16:23:15, Dieter Buerssner wrote:
>On March 05, 2001 at 16:05:46, Sune Larsson wrote:
>
>> 8/8/4pk1B/8/5K1N/p7/8/8 w - - 0 1
>>
>> Schröder 19??
>>
>> Well, Mr Schröder seems to be a man of many talents. This is a very
>> nice position, made in his youth I think. ;) Black is about to promote
>> and the white pieces sort of step on eachother's toes. But there is
>> a way for white to draw. A stunning resource that shows the beauty
>> of chess. Rebel might prove good at this one...;)
>>
>>
>> Test: White to move and draw. The quicker the better.
>> Solution further down.
>
>Yace won't show a draw score soon:
>
> 625780 5.446 -3.94 10t 1.Bg5+ Kf7 2.Nf3 a2 3.Ne5+ Ke8 4.Kg4 a1=Q 5.Bf4
> Qg1+ 6.Kf3 Qd4 7.Kg4 Ke7 {-391}
> 748493 6.638 -3.93 10t+ 1.Nf5 Kf7 2.Bf8 a2 3.Bg7 a1=R
> 821975 7.285 -1.26 10t 1.Nf5 exf5 2.Bf8 a2 3.Bb4 a1=B 4.Bd2 Be5+ 5.Kf3
> Ke6 6.Bf4 Bd4 {-80}
> 844330 7.468 -1.26 10. 1.Nf5 exf5 2.Bf8 a2 3.Bb4 a1=B 4.Bd2 Be5+ 5.Kf3
> Ke6 6.Bf4 Bd4 {-80}
> 877046 7.875 -1.31 11t 1.Nf5 exf5 2.Bf8 a2 3.Bb4 a1=B 4.Bd6 Ke6 5.Bc5
> Be5+ 6.Kg5 Bc7 7.Be7 {-80}
> 1042376 9.009 -1.31 11. 1.Nf5 exf5 2.Bf8 a2 3.Bb4 a1=B 4.Bd6 Ke6 5.Bc5
> Be5+ 6.Kg5 Bc7 7.Be7 {-80}
> 1123009 9.956 -1.28 12t 1.Nf5 exf5 2.Bf8 a2 3.Bb4 a1=B 4.Bd6 Ke6 5.Bc7
> Bb2 6.Ke3 Bc1+ 7.Kd4 Bd2 {-80}
> 1450298 12.083 -1.28 12. 1.Nf5 exf5 2.Bf8 a2 3.Bb4 a1=B 4.Bd6 Ke6 5.Bc7
> Bb2 6.Ke3 Bc1+ 7.Kd4 Bd2 {-80}
>
Of course, with the 5 piece tablebase files, it is a piece of cake for Yace for
obvious reasons:
Yace (Yet another chess engine) version 0.99.01
Type help for a (very unhelpful) list of commands
Make sure, you have a file yace.ini in the current directory, with a line:
hash 30M
or similar, otherwise Yace will only use a very small hash of 1M.
DBBOOK101 100000 128 20 ff 251465
entries 87381 size 1048572 size_wanted 1048576 tts3 29126
pos_learn = 1
Stored 4 learned positions into hash table
5-men endgame table bases found
hash size wanted 32000000
Stored 4 learned positions into hash table
entries 2666664 size 31999968 size_wanted 32000000 tts3 888887
white ( 1): post
white ( 1): st 60
white ( 1): test ed.ci
title "Ed -- Man of Many Talents"
Stored 4 learned positions into hash table
solution Nf5
usetime = 59.00, mintime = 59.00 maxtime = 59.00 tl 59.00 ml 0
1 0.000 4.19 1t 1.Ke4 {530}
14 0.001 4.19 1. 1.Ke4 {530}
60 0.001 3.79 2-- 1.Ke4 a2 2.Ng6 {530}
97 0.003 -0.31 2t 1.Ke4 a2 2.Bg5+ Kxg5 {180}
147 0.042 3.74 2t+ 1.Nf3 a2 2.Bg5+ Kf7 {530}
175 0.043 3.74 2t 1.Nf3 a2 2.Bg5+ Kf7 {530}
206 0.044 4.15 2t+ 1.Bg5+ Kf7
227 0.046 4.30 2t 1.Bg5+ Kf7 2.Ke5 {530}
312 0.047 4.30 2. 1.Bg5+ Kf7 2.Ke5 {530}
566 0.068 3.92 3t 1.Bg5+ Kf7 2.Nf3 a2 3.Ne5+ Ke8 {530}
806 0.134 3.92 3. 1.Bg5+ Kf7 2.Nf3 a2 3.Ne5+ Ke8 {530}
1222 0.150 0.00 4-- 1.Bg5+ Kf7 2.Nf5 exf5 {EGTB} {190}
1505 0.163 -0.31 4t 1.Bg5+ Kf7 2.Nf5 a2 3.Nh6+ Kg7 4.Bf6+ Kxf6 {180}
3392 0.276 -0.31 4. 1.Bg5+ Kf7 2.Nf5 a2 3.Nh6+ Kg7 4.Bf6+ Kxf6 {180}
6342 0.396 -0.68 5t 1.Bg5+ Kf7 2.Nf5 e5+ 3.Ke4 a2 4.Bf6 a1=Q 5.Bxe5
{-311}
6736 0.591 -0.31 5t+ 1.Ke4 a2 2.Be3 a1=Q 3.Bd4+ Kg5 4.Bxa1 Kxh4H
{270}
6938 0.651 -0.31 5t 1.Ke4 a2 2.Be3 e5 3.Bd4 exd4 {180}
7473 0.734 0.00 5t+ 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
7738 0.775 0.00 5t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
8023 0.965 0.00 5. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
9574 1.156 0.00 6t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
15507 1.278 0.00 6. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
19077 1.416 0.00 7t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
30745 1.737 0.00 7. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
36331 1.903 0.00 8t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
60463 2.413 0.00 8. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
76736 3.153 0.00 9t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
114085 4.212 0.00 9. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
130128 5.430 0.00 10t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
189619 6.359 0.00 10. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
226635 7.707 0.00 11t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
326166 9.398 0.00 11. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
365813 10.786 0.00 12t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
514552 13.782 0.00 12. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
616877 15.694 0.00 13t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
891694 20.969 0.00 13. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
1018283 23.548 0.00 14t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
1415483 28.781 0.00 14. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
1641694 31.896 0.00 15t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
2350761 38.287 0.00 15. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
2661328 42.547 0.00 16t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
3687128 53.014 0.00 16. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
4245094 58.254 0.00 17t 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} {190}
4320471 59.073 0.00 17u. 1.Nf5 a2 2.Bg7+ Kf7 3.Be5 exf5 {EGTB} 4.Bh8
a1=Q 5.Bxa1! Kf8 6.Bb2 Kg8 7.Ba3 Kh8 8.Bb4 Kg8
9.Ba5 Kh8 10.Bb6 Kg8 11.Ba7 Kh8 12.Bb8 Kg8
13.Bc7 Kh8 14.Bb8 Kg8 15.Bc7 Kh8 16.Bb8
{repetition} {270}
4320471 Nodes, 3.40% Leavenodes, 73138 Nodes/sec
1851961 eval, 100.00% score, 17867746 genmoves, 0.93% captures le 60/178
ext: pawn 893, rcp 0, chk 243153, repchk 17825, null 2215, prune 677512
htable: 2191605 store, 0 rejected, 4315007 probe, 75.9% f/p, 149.5% f/s
entries 2666664 age 0 renew 0
egtb probes 55765, found 55765
ok after 0.73 sec
test_nodes 7473 l 0
1 tested, 1 found, 0 mates
4320471 nodes, 146889 leavenodes in 59.42 sec 72708 n/s
test nodes 7473 win nodes 7473 mate nodes 0
win time 0.73 mate time 0.00 av depth 16.000 (nm 16.000) maxdepth 29, tu 599
log(win_nodes) = 3.87349 log(win_time) = -0.13430
white ( 1):
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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