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Home * Engines * Tao

a Chess Engine Communication Protocol and later UCI [2] compliant chess engine by Bas Hamstra, famous for its attacking playing style encouraged by an opening book cooked by Cock de Gorter [3]. Tao played the WMCCC 2001 in Maastricht, six Dutch Open Computer Chess Championships and four International CSVN Tournaments from 2000 until 2005, and three CCT Tournaments.


Tao is a bitboard engine that uses PVS without root aspiration windows. Tao applies incremental updated attacks, incremental move generation, uses SEE to prune losing captures, and extends checks, one reply, recaptures and mate threats along with null move pruning of R=2 [4]. It further considers check giving moves in quiescence search [5]. Version 5.5 uses evaluation tuning based on temporal differences [6].

Photos & Games


DOCCC 2004: Elke van Vlierberghe and Bas Hamstra, Tao - Deep Sjeng [7]

[Event "DOCCC 2004"]
[Site "Leiden Ned"]
[Date "2004.10.17"]
[Round "06"]
[White "Tao"]
[Black "Deep Sjeng"]
[Result "1/2-1/2"]

1.c3 e5 2.e4 d5 3.Qa4+ Nd7 4.exd5 Ngf6 5.c4 Bc5 6.Nc3 O-O 7.d3 Nb6 8.Qd1 Qe7 9.Bg5 h6 
10.Bxf6 Qxf6 11.Nf3 Bd4 12.Be2 Qg6 13.O-O Bh3 14.Ne1 Bd7 15.Nc2 Bh3 16.Bf3 Bxc3 17.bxc3 
Bf5 18.Bh5 Qh7 19.Ne1 e4 20.dxe4 Bxe4 21.Qd4 Rfe8 22.f3 Bf5 23.Rd1 Rad8 24.Rd2 c5 25.Qxc5 
Rc8 26.Qb5 Nxc4 27.Rd4 Ne3 28.Rf2 g6 29.d6 Nd5 30.Rxd5 Rxe1+ 31.Rf1 Rxf1+ 32.Kxf1 Be6 
33.d7 Rd8 34.Qa5 b6 35.Qxa7 Qg7 36.Qxb6 Qf8 37.Rd4 gxh5 38.a4 Qe7 39.Qc7 Rxd7 40.Rxd7 Bxd7 
41.c4 Qe6 42.a5 Bc8 43.Qd8+ Kg7 44.Qd4+ Kg6 45.Kf2 Ba6 46.c5 h4 47.Qxh4 Qe2+ 48.Kg3 Qe5+ 
49.Qf4 Qxc5 50.Qe4+ Kg7 51.Qg4+ Kf8 52.Qf4 Qxa5 53.Qxh6+ Kg8 54.h3 Qe5+ 55.f4 Qe1+ 56.Kh2 
Bd3 57.Qg5+ Bg6 58.Qd8+ Kg7 59.Qd4+ Kh7 60.Qc5 Qd2 61.Qe5 Qc2 62.Qf6 Qf2 63.Qe5 Kg8 64.Qg5 
Kg7 65.Qe5+ f6 66.Qe7+ Bf7 67.Qe4 Kh6 68.Qf5 Qb2 69.Qd3 Bg6 70.Qd8 Kg7 71.Qd7+ Bf7 72.Qg4+ 
Kh6 73.Qf5 Bc4 74.Qe4 Ba2 75.Qf5 Bb3 76.Kg3 Qd4 77.Kh4 Bf7 78.g3 Bg6 79.Qc8 Kg7 80.Qc1 Bf5 
81.Qe1 Kf7 82.Qe2 Be6 83.Qh5+ Kf8 84.Qh8+ 1/2-1/2


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