Critter 0.52 available

rvida · Post by **rvida** » Mon Jan 25, 2010 12:19 pm

This is a complete rewrite (moving from Pascal to C/C++) utilizing bitboards. It took me quite a time, but I am very satisfied. NPS almost doubled(!). Search algorithm is almost the same with only a few bugfixes. Static evaluation is a bit different due to bitboards, but all major terms are pretty close maybe except king safety.

32 & 64bit binaries + opening book:

http://www.mediafire.com/?wzmmxzg5djj

Richard

SzG · Post by **SzG** » Mon Jan 25, 2010 12:38 pm

rvida wrote:This is a complete rewrite (moving from Pascal to C/C++) utilizing bitboards. It took me quite a time, but I am very satisfied. NPS almost doubled(!). Search algorithm is almost the same with only a few bugfixes. Static evaluation is a bit different due to bitboards, but all major terms are pretty close maybe except king safety.

32 & 64bit binaries + opening book:

http://www.mediafire.com/?wzmmxzg5djj

Richard

Thank you, Richard. I was looking forward to see your new version appear, and it is a pleasant surprise it's already here.

Dr.Wael Deeb · Post by **Dr.Wael Deeb** » Mon Jan 25, 2010 1:20 pm

Thanks,much appreciated Richard

One of the most promising rising stars in the computer chess world

Cheers,
Dr.D

P.S.Will be tested with pleasure

meschle · Post by **meschle** » Mon Jan 25, 2010 1:37 pm

rvida wrote:This is a complete rewrite (moving from Pascal to C/C++) utilizing bitboards. It took me quite a time, but I am very satisfied. NPS almost doubled(!). Search algorithm is almost the same with only a few bugfixes. Static evaluation is a bit different due to bitboards, but all major terms are pretty close maybe except king safety.

32 & 64bit binaries + opening book:

http://www.mediafire.com/?wzmmxzg5djj

Richard

Thanks richard - looking forward to test the new version.

I cant believe you achieved such a rating with a pascal engine - now its in c++ i cant wait to see what critter delivers

swami · Post by **swami** » Mon Jan 25, 2010 1:41 pm

meschle wrote:
rvida wrote:This is a complete rewrite (moving from Pascal to C/C++) utilizing bitboards. It took me quite a time, but I am very satisfied. NPS almost doubled(!). Search algorithm is almost the same with only a few bugfixes. Static evaluation is a bit different due to bitboards, but all major terms are pretty close maybe except king safety.

32 & 64bit binaries + opening book:

http://www.mediafire.com/?wzmmxzg5djj

Richard
Thanks richard - looking forward to test the new version.

I cant believe you achieved such a rating with a pascal engine - now its in c++ i cant wait to see what critter delivers

Hopefully, I think we should expect the 100 more elo improvement. C++ I heard is obviously orders of magnitude efficient.

Thanks, Richard, Testing it now.

Steve Maughan · Post by **Steve Maughan** » Mon Jan 25, 2010 3:21 pm

swami wrote:Hopefully, I think we should expect the 100 more elo improvement. C++ I heard is obviously orders of magnitude efficient.

I'm experience in both Delphi / Pascal and C - the difference is *maybe* 30% at most in favor of C / C++. Certainly not an order of magnitude different.

Cheers,

Steve

Graham Banks · Post by **Graham Banks** » Mon Jan 25, 2010 5:31 pm

Thanks Richard. The Critter is slowly becoming a monster.

Oratios · Post by **Oratios** » Mon Jan 25, 2010 8:21 pm

Thank you for the nice engine. Very interesting !

swami · Post by **swami** » Mon Jan 25, 2010 11:22 pm

Code: Select all

----------------------------------------------------------------------------------------------------------------------------------
                |  STS1  |  STS2  |  STS3  |  STS4  |  STS5  |  STS6  |  STS7  |  STS8  |
----------------------------------------------------------------------------------------------------------------------------------
Critter_0.52_32bit  |    80    |    73    |    73    |    75    |    77    |    75    |    61    |    63    |
----------------------------------------------------------------------------------------------------------------------------------
Grade              |    A+    |    A-    |    A-    |    A    |    A    |    A    |    B    |    B    |
Score / 1000     |    864    |    759    |    809    |    834    |    821    |    872    |    693    |    724    |
Grade              |    S    |    A    |    A+    |    A+    |    A+    |    S    |    B+    |    A-    |
Best Move &#58;  577 / 800  72.12 %  Grade &#58; A-
Total &#58;           6376 / 8000  79.7 %  Grade &#58; A
----------------------------------------------------------------------------------------------------------------------------------

Werner · Post by **Werner** » Sun Jan 31, 2010 9:44 am

Hi,
I had some problems with Critter running inside Shredder 12 GUI. First I saw very bad results. Then I had a look at the games (played on different pcs). All look the same:
Critter always displays a 0.00 eval. I had this problem not in Arena 2.01. Any ideas what happens??
Games look like these:

Werner

[Event "40 Züge in 10 min"]
[Site "Engine Match"]
[Date "2010.01.30"]
[Round "4"]
[White "Toga II 1.2.1a"]
[Black "Critter 0.52 x64"]
[Result "1-0"]
[PlyCount "95"]
[EventDate "2010.??.??"]

1. d4 {Buch 0s} d5 {Buch 0s} 2. Nf3 {Buch 0s} Nf6 {Buch 0s} 3. c4 {Buch 0s} c6
{Buch 0s} 4. Nc3 {Buch 0s} e6 {Buch 0s} 5. Bg5 {Buch 0s} h6 {Buch 0s} 6. Bh4 {B
uch 0s} dxc4 {Buch 0s} 7. e4 {Buch 0s} g5 {Buch 0s} 8. Bg3 {Buch 0s} b5 9. Ne5
{+0.22/14 19s} h5 {0.00/17 37s (Lg7)} 10. h4 {+0.02/14 17s} g4 {0.00/17 1:25m}
11. a3 {-0.07/14 17s (Lf4)} Bh6 {0.00/17 31s (Lb7)} 12. Be2 {+0.17/14 16s} Qb6
{0.00/18 30s (Lb7)} 13. a4 {+0.19/14 14s} O-O {0.00/18 29s} 14. a5 {+0.04/13
11s (axb5)} Qb7 {0.00/18 28s} 15. f3 {+0.20/14 18s (Dc2)} Qe7 {0.00/16 32s
(Td8)} 16. O-O {+0.48/14 16s (Dc2)} Be3+ {0.00/15 26s (b4)} 17. Kh1 {+0.89/14
18s} Nfd7 {0.00/17 24s} 18. fxg4 {+1.22/14 18s (Sxd7)} Nxe5 {0.00/17 33s} 19.
dxe5 {+1.20/15 14s} Qd8 {0.00/17 22s (Td8)} 20. Qe1 {+1.43/14 11s (gxh5)} hxg4
{0.00/18 20s} 21. Bh2 {+1.42/15 16s (Lf4)} Nd7 {0.00/16 27s (Lh6)} 22. Qg3 {
+1.26/1513s} Bh6 {0.00/18 27s} 23. Qxg4+ {+1.60/16 19s} Bg7 {0.00/19 15s} 24.
Rad1 {+1.81/14 19s (Tf3)} b4 {0.00/17 14s (De8)} 25. Bf4 {+2.45/13 19s (h5)}
Qc7 {0.00/15 19s (Kh7)} 26. Rxd7 {+5.17/14 19s (Td6)} Qxd7 {0.00/17 14s} 27.
Bh6 {+5.22/16 20s} f5 {0.00/17 13s} 28. exf6 {+6.04/13 11s} Rf7 {0.00/17 15s}
29. Na4 {+6.10/14 20s} c3 {0.00/16 11s (Dc7)} 30. bxc3 {+6.80/14 20s} bxc3 {
0.00/15 8s (Dc7)} 31. Nxc3 {+7.66/12 20s} Rb8 {0.00/15 6s (Dc7)} 32. Rd1 {
+8.62/1321s} Qc7 {0.00/15 5s} 33. Bxg7 {+14.24/12 18s} Ba6 {0.00/14 3s (Ld7)}
34. Bxa6 {+16.29/11 20s} Rxg7 {0.00/0 1s} 35. fxg7 {+18.68/12 22s} Qxg7 {
0.00/0 1s (Df7)} 36. Qxe6+ {+22.41/13 22s} Qf7 {0.00/0 1s} 37. Qxc6 {+23.50/12
22s} Qh7 {0.00/0 1s (Tf8)} 38. Qe6+ {+21.16/12 23s (Lc4+)} Qf7 {0.00/0 1s} 39.
Qg4+ {+M11/12 23s} Kh8 {0.00/15 1s (Kh7)} 40. Rd6 {+M9/11 22s (Td5)} Kh7 {0.00/
14 1s} 41. e5 {+M8/11 19s (Dg5)} Qg7 {0.00/20 30s} 42. Qh5+ {+M7/12 18s} Kg8 {
0.00/2329s} 43. Bc4+ {+M6/14 5s} Kf8 {0.00/26 28s} 44. Rf6+ {+M5/33 3s} Ke7 {
0.00/5625s} 45. Nd5+ {+M4/63 0s} Kd8 {0.00/0 0s (Kd7)} 46. Rd6+ {+M3/63 0s} Kc8
{0.00/0 0s} 47. Qe8+ {+M2/63 0s} Kb7 {0.00/0 0s} 48. Qc6# {+M1/63 0s} 1-0

edited: just tried to repeat: inside engine window I see the correct evaluation but in moves window it looks like 0.00 /17 35 sec

TalkChess.com

Critter 0.52 available

Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Re: Critter 0.52 available

Some problems with Critter 0.52