Author: Johan de Koning
Date: 23:54:51 09/22/03
Go up one level in this thread
On September 21, 2003 at 12:29:21, Tim Foden wrote:
>On September 21, 2003 at 01:00:37, Paul Byrne wrote:
[...]
>>[D]8/1pppppp1/8/p6p/P6P/8/1PPPPPP1/8 w - - 0 3
[...]
>>mv=e4 e=0 d=22 n=-989389009 t=4577.107
>>mv=e4 e=32 d=23 n=1675198974 t=8170.032
>>mv=e4 e=273 d=24 n=1318190910 t=13610.508
>>mv=e4 e=9969 d=25 n=-1677339015 t=26967.618
>
>Does 9969 translate as a 'mate' in 16 [as (10000 - 9969 + 1) / 2 == 16]? Hmmm..
>May still have a bug in my thing, as it thinks d4 (and therefore also e4) is
>mate in 15 from this position.
>
>And here is the PV... :)
>
> 28 29:40.7 +Mate15 1973m d4 d5 2. c3 e6 3. f3 f6 4. e3 g5 5. c4 dxc4 6. e4
> c3 7. bxc3 gxh4 8. f4 h3 9. gxh3 b5 10. e5 fxe5
> 11. d5 exd5 12. fxe5 b4 13. e6 bxc3 14. e7 c5
> 15. e8
>
>Anyone else got a mate length or PV?
Mate length seems to match, PV not quite. :-)
After 22 ply the Pawn at b4 is a runner, hence the truncation.
Known bug: en passent not implemented.
036.58 32M189 D19 +2 : d4,f6 e4,g5 g3,c6 c4,d5 cxd5,cxd5 exd5,g4 b3, ...
113.10 100M531 D21 +2 : d4,d5 c3,c6 b4,b6 f3,f6 e4,dxe4 fxe4,g5 g3,g4 ...
258.65 233M778 D23 +101 : d4,d5 f3,c6 g3,b5 b3,f6 g4,e5 c3,e4 gxh5,e3 f ...
490.16 450M424 D25 +9971 : d4,d5 c3,b6 b4,c6 f3,f6 g4,g6 e3,e6 gxh5,gxh5 ...
688.55 638M888 D27 +9971 : d4,d5 c3,b6 b4,c6 f3,f6 g4,g6 e3,e6 gxh5,gxh5 ...
921.82 863M199 D29 +9971 : d4,d5 c3,b6 b4,c6 f3,f6 g4,g6 e3,e6 gxh5,gxh5 \
e4,axb4 cxb4,dxe4 fxe4,c5 bxc5,bxc5
0000011111 1111222222 2222222222 :::::::::: :::::::::: :::::::::: ::::::::::
0347802346 7889011223 3444444433 :::::::::: :::::::::: :::::::::: ::::::::::
Bottom lines is the floor(log2(Nodes(depth))) distribution of the final
iteration, just for fun.
... Johan
PS: after implementing en passent the output is almost the same.
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