For Anthony Cozzie about Zappa 0.80 b2

[Arnaud Lohéac]

Hi,

I just noticed a strange thing in this game from the Tournament League POSEIDON n?3 running.

Please, look at the end of this game :

[Event "Tournoi Ligue POSEIDON N?3"]
[Site "DEMON"]
[Date "2004.12.19"]
[Round "1"]
[White "Zappa 0.80b2"]
[Black "Ufim 5.02"]
[Result "0-1"]
[ECO "B27"]
[Opening "Sicilian"]
[Time "11:15:00"]
[Variation "Hungarian Variation, 1.e4 c5 2.Nf3 g6"]
[TimeControl "1200+0"]
[Termination "normal"]
[PlyCount "130"]
[WhiteType "program"]
[BlackType "program"]

1.e4 {+0.22/11} c5 2.Nf3 {+0.43/11} g6 3.Bc4 {+0.64/10} Bg7 {-0.38/9} 4.O-O
{+0.63/10} Nc6 {-0.22/10} 5.d3 {+0.45/10} d6 {-0.24/9} 6.Nc3 {+0.60/9} Nf6 {-0.15/9} 7.d4
{+0.36/10} cxd4 {+0.09/9} 8.Nxd4 {+0.24/11} O-O {+0.07/9} 9.Nxc6 {+0.17/10} bxc6 {+0.20/9}
10.Bb3 {+0.14/10} Rb8 {+0.34/8} 11.Be3 {+0.21/10} c5 {+0.41/8} 12.e5 {+0.32/10} Ng4
{+0.61/9} 13.exd6 {+0.06/10} Nxe3 {+0.79/9} 14.fxe3 {+0.12/10} exd6 {+0.87/9} 15.Qd3
{0.00/10} Be5 {+0.91/8} 16.Rad1 {0.00/9} Qh4 {+1.28/8} 17.g3 {-0.34/11} Qh5 {+1.13/8}
18.Ne4 {-0.06/9} Bf5 {+1.14/8} 19.Qd5 {-0.02/9} Qh6 {+1.03/7} 20.Nxd6 {-0.28/10} Qxe3+
{+0.64/8} 21.Kg2 {-0.29/9} Be6 {+1.09/8} 22.Qd2 {-0.74/11} Qxd2+ {+1.47/9} 23.Rxd2
{-0.76/12} Bxd6 {+1.86/11} 24.Rxd6 {-0.83/13} c4 {+1.72/11} 25.Ba4 {-1.14/12} Rxb2
{+1.79/10} 26.a3 {-1.15/12} Rfb8 {+1.87/9} 27.Rf2 {-1.07/10} Ra2 {+1.84/9} 28.Rf3
{-1.01/11} Rb6 {+2.07/8} 29.Rxb6 {-0.95/13} axb6 {+2.06/11} 30.Rc3 {-1.07/12} Bd5+
{+2.09/11} 31.Kf2 {-0.86/12} Rb2 {+1.81/12} 32.Bd7 {-0.80/12} Kg7 {+1.86/11} 33.Ke3
{-0.77/13} Rb1 {+1.97/10} 34.a4 {-0.74/12} Re1+ {+1.80/10} 35.Kd4 {-0.74/11} Rd1+
{+1.63/10} 36.Ke3 {-0.74/11} Rh1 {+1.41/10} 37.Kd4 {-0.69/11} Rd1+ {+1.52/10} 38.Ke3
{-0.58/10} f5 {+1.52/10} 39.Bb5 {-0.21/11} Rh1 {+1.35/10} 40.Bxc4 {-0.11/11} Bxc4
{+1.03/10} 41.Rxc4 {0.00/12} Rxh2 {+0.75/10} 42.Rc6 {-0.09/13} Rh3 {+0.56/10} 43.Kf3
{0.00/13} Rh1 {+0.48/11} 44.Rxb6 {0.00/12} Ra1 {+0.47/10} 45.Ra6 {0.00/13} Ra3+ {+0.45/9}
46.Kf4 {+0.02/12} Rc3 {+0.33/10} 47.a5 {+0.02/12} Rxc2 {+0.41/10} 48.Ra8 {-0.26/12}
Rc4+ {+1.04/10} 49.Kf3 {-0.58/12} Ra4 {+1.25/11} 50.Ra6 {-0.91/13} Kh6 {+1.91/12}
51.Ra7 {-0.91/15} Kg5 {+1.92/12} 52.Rxh7 {-0.91/15} Rxa5 {+1.93/13} 53.Rd7 {-0.91/15}
Ra3+ {+1.93/13} 54.Kf2 {-0.91/15} Kf6 {+1.93/13} 55.Rd6+ {-0.91/14} Kf7 {+1.93/13}
56.Rd4 {-0.90/12} g5 {+1.94/11} 57.Rd6 {-0.90/13} Ra2+ {+1.94/12} 58.Ke3 {-0.90/13}
Ra4 {+1.94/12} 59.Rc6 {-0.90/14} Ra3+ {+1.94/12} 60.Kf2 {-0.90/14} Rd3 {+1.94/13}
61.Rh6 {-0.90/15} Rc3 {+1.94/13} 62.Rb6 {-0.90/15} Kg7 {+1.94/12} 63.Rb5 {-0.90/14}
Kg6 {+1.95/12} 64.g4 {-0.81/13} fxg4 {+2.62/11} 65.Rxg5+ {-0.26/11} Kxg5
{+54.13/12} {0-1 Adjug? par Arena. Coup ill?gal!} 0-1

it ends by the strange move Rxg5 ?

I hope this could help you.


ARNAUD'S COMPUTER CHESS CORNER
http://perso.club-internet.fr/aloheac

Have a good day.

Arnaud Loh?ac

[Anthony Cozzie]

Hmm, that does seem odd. Must be associated with the excess solar activity we've been seeing this month.

anthony

[Anthony Cozzie]

Did you have TBs on?

anthony

[Arnaud Lohéac]

Hi Anthony,

Here are the settings : P4 2,4 GHz, 1 GB RAM, Win XP SP2, Arena 1.1 GUI, Hash 256 MB, 20'/engine, own books, pondering off, Nalimov 3 and 4 pieces + some of the 5 pieces, Tablebase hash = 24 MB.

The last word send in the game is "illegal move" ("coup ill?gal" in french).
Any idea why ?

Arnaud loheac

[Anthony Cozzie]

B2 has some bugs regarding tablebases and making illegal moves, although I doubt they should show up here . . .

They are fixed here, but I probably won't release another version until after CCT, so I guess the solution is just to turn of tablebases.

anthony