LittleThought 1.052 64-bit Gauntlets (CCRL 40/40)

[Aser Huerga]

LittleThought 1.052 64-bit Gauntlets

Hardware: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHzDual 3000 MHz with 4.088 MB Memory
Operating system: Microsoft Windows XP 64 Bit Professional Service Pack 2 (Build 3790)
All engines 1 CPU
Arena 2.0.1 GUI
128 Hash Tables
3-4-5 EGTBs
Ponder off
Book GrandPQRS PGN up to 8 moves (151.315 starting positions from years 1981-2009, games selected by Norm Pollock), each pair plays the same position with switched colours.
40 moves in 25 minutes repeating (adapted to the CCRL 40/40 standard)

Gauntlet I:

Code: Select all

1   LittleThought 1.052 64-bit -2592- 67.5/120
2   Anatoli 0.35k               2579  16.5/24
3   DanaSah 4.37                2590  13.0/24
4   Muse 0.899b                 2527  8.5/24
5   Kiwi 0.6d                   2549  7.5/24
6   Gosu 0.16                   2502  7.0/24

(All ELOs referred to the last Chess Computer Rating List when tournament starts, except -XXXX- one, wich is referred to performance).


Statistics:

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LittleThought 1.052 64-bit    : 120 (+ 53,= 29,- 38), 56.2 %

Gosu 0.16                     :  24 (+ 14,=  6,-  4), 70.8 %
Muse 0.899b                   :  24 (+ 13,=  5,-  6), 64.6 %
Kiwi 0.6d                     :  24 (+ 13,=  7,-  4), 68.8 %
Anatoli 0.35k                 :  24 (+  6,=  3,- 15), 31.2 %
DanaSah 4.37                  :  24 (+  7,=  8,-  9), 45.8 %

Games: http://kirill-kryukov.com/chess/discuss ... 458#p53458

Is interesting how LittleThought gets easily depths up to 20 plies in the middlegame, after a very agressive prunning, I suppose. Sometimes works, sometimes not ... a good performance anyway.
More games underway.

[nthom]

Yes it is pretty aggressive, I guess that makes it better at short time controls than longer ones. A result of my testing methods I suppose.

[Aser Huerga]

Well, you have a wide margin to soften the prunning, actually LittleThough is almost doubling the depths reached by the other engines around 2500-2600 ELO points.
Thanks for you engine, Nathan, and go ahead improving it!!

[Aser Huerga]

Gauntlet II:

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1   LittleThought 1.052 64-bit -2605- 62.0/120
2   Pepito 1.59                 2581  14.0/24
3   Ufim 8.02                   2646  13.0/24
4   Philou 3.1.4.1              2606  11.5/24
5   Yace 0.99.87                2584  10.5/24
6   Bruja 1.9                   2556  9.0/24

(All ELOs referred to the last Chess Computer Rating List when tournament starts, except -XXXX- one, wich is referred to performance).


Statistics:

Code: Select all

LittleThought 1.052 64-bit    : 120 (+ 48,= 28,- 44), 51.7 %

Ufim 8.02                     :  24 (+  8,=  6,- 10), 45.8 %
Philou 3.1.4.1                :  24 (+ 10,=  5,-  9), 52.1 %
Yace 0.99.87                  :  24 (+ 12,=  3,-  9), 56.2 %
Pepito 1.59                   :  24 (+  7,=  6,- 11), 41.7 %
Bruja 1.9                     :  24 (+ 11,=  8,-  5), 62.5 %

Games: http://kirill-kryukov.com/chess/discuss ... 554#p53554

[Aser Huerga]

LittleThought climbs up to position 75 from position 120 with the 1.052 64-bit version , showing an improvement of 159 ELO points regarding the 1.03 32-bit version (now 2602 in CCRL 40/40 1CPU), only 3 ELO points behind NanoSzachy and 10 ELO points ahead Trace.
http://computerchess.org.uk/ccrl/4040.l ... ons_only=1

[nthom]

I'm seriously above Trace now??? Does that put me at #1 Australian engine? Sorry Ross