Aart's Blog

A test tournament between different versions of Miguel Ballicora's Gaviota and Michel Van den Bergh's GNU chess.                          1          2          3          4          5           1 GNU Chess 5.07.170.7b ********** 000½10011½ 11½1110110 1100½01001 0111101111 24.0/40 2 gaviota v0.80.0.107   111½01100½ ********** ½010110100 0100½11110 ½101000011 20.5/40 3 GNU Chess 5.07.153.3b 00½0001001 ½101001011 ********** 0101010½01 0111111½10 20.0/40 4 gaviota v0.82-beta2   0011½10110 1011½00001 1010101½10 ********** 00110001½0 19.0/40 5 gaviota v0.83         1000010000 ½010111100 1000000½01 11001110½1 ********** 16.5/40 And another test tournament between different versions of Jan Brouwer's Rotor and Ben-Hur Carlos Vieira Langoni Jr.'s RedQueen.                     1          2          3          4          5           1 Rotor 0.6a        ********** ½111111011 1011111101 111½111111 11½1111111 35.5/40 2 RedQueen 0.9.8    ½000000100 ********** 1½01½½010½ 11½

Another test tournament between different Android Stockfish versions and compilations (from Jim Ablett and myself ).            1          2          3          4          5          6           1 2.0      ********** 01½11½01½0 0½1½0100½½ 010½½½½½½1 ½1011½½½½1 ½11001½½11 27.5/50 2 2.1 JA   10½00½10½1 ********** 1½½1½1½100 ½½11½00111 1½011½½010 1½00001½1½ 27.0/50 3 2.1.1 JA 1½0½1011½½ 0½½0½0½011 ********** ½½½1½10½½½ 0½0010½½½½ ½½1½101½½1 25.5/50 4 1.9      101½½½½½½0 ½½00½11000 ½½½0½01½½½ ********** 100½1½0½1½ 1½10½0111½ 24.5/50 5 2.1      ½0100½½½½0 0½100½½101 1½1101½½½½ 011½0½1½0½ ********** ½½010½0101 24.0/50 6 1.8      ½00110½½00 0½11110½0½ ½½0½010½½0 0½01½1000½ ½½101½1010 ********** 21.5/50

I am generalizing the engine match feature in Chess for Android  into an engine tournament feature, where several engines can be invited at once, after which the GUI plays matches between all engine pairs. To test this new feature, I ran a tournament between a few of the Android UCI engines recently released on Jim Ablett's Chess Projects Website , as well as the built-in Java engine (using the fast-move setting, 32MB hash, and Nalimov, Gaviota, Scorpio, Robbobases endgame tablebases on SD card). Below the results are given in cross-table format.                   1          2          3          4          5          6  1 Stockfish 2.1.1 ********** 11110½11½1 111½111111 1111111111 1111111111 1111111111   47.5/50 2 Komodo32 1.3    00001½00½0 ********** 1111111111 1111111111 1111111111 1111111111   42.0/50 3 Rotor 0.4       000½000000 0000000000 ********** 1111011111 1111111111 1111111111   29.5/50 4 Diablo 0.5.1    0000000000 0000000000 0000100000 ********** 1111111111 1

Google celebrates each new Android release with another statue on our campus. Below some pictures I took today. Can you spot cupcake, donut, eclair, froyo, gingerbread, and honeycomb (and a Nexus One)?

Don Dailey and Larry Kaufman released their chess engine  Komodo 1.3  for Android, kindly compiled by Jim Ablett and made available at his excellent Jim Ablett's Chess Projects Website (where you can find many more engines). Below you see some screenshots importing the UCI engine into Chess for Android . The engine is strong. The following cross-table shows the results of a few one-second-per-move matches with other engines on a Nexus S (1GHz Hummingbird) with 32MB hash and Nalimov/Gaviota/Scorpio/Robbobases endgame tablebases on SD card. Komodo 1.3 - RobboLito 0.085e4l     2.5 - 7.5  +2/-7/=1  25.00%            - IvanHoe-Beta v999947c  3.0 - 7.0  +2/-6/=2  30.00%            - Stockfish 2.0          4.0 - 6.0  +2/-4/=4  40.00%            - RobboLito 0.085g3l     5.0 - 5.0  +4/-4/=2  50.00%            - Toga II 1.4.1SE        7.0 - 3.0  +6/-2/=2  70.00%            - Rotor 0.6a             9.5 - 0.5  +9/-0/=1  95.00%            - BikJump v2.1P         10.0 - 0.0 +10/-0/=0 100.0