White Elo Black Elo ECO Year Res. #       Donaldson, John W 2405 Costigan, Richard 2240 B30 1983 ½-½ 29 Alzate, Dario 2365 Costigan, Richard 2310 D18 1986 ½-½ 60 Dauvergne, Peter 2200 Costigan, Richard 2310 A55 1986 ½-½ 11 Fedorowicz, John P 2500 Costigan, Richard 2310 A55 1986 ½-½ 47 Frias Pablaza, Victor ... 2440 Costigan, Richard 2310 A55 1986 ½-½ 62 Pelts, Roman 2430 Costigan, Richard 2375 A55 1987 ½-½ 19 Stone, Raymond 2340 Costigan, Richard 2375 D17 1987 ½-½ 61 Witt, Laszlo 2340 Costigan, Richard 2375 A05 1987 ½-½ 23 Klein, Lawrence 2280 Costigan, Richard 2375 A53 1989 ½-½ 60 Leow, Leslie M 2445 Costigan, Richard 2375 C90 1989 ½-½ 8 Byrne, Robert Eugene 2460 Costigan, Richard 2320 C98 1990 ½-½ 53 Yedidia, Jonathan 2365 Costigan, Richard 2295 C31 1993 ½-½ 57 Ibragimov, Ildar 2580 Costigan, Richard 2295 A44 1995 ½-½ 70 Lugo, Blas 2406 Costigan, Richard 2312 B01 2005 ½-½ 109 Page 1
Donaldson, John W (2405) - Costigan, Richard (2240) - Northwest Chess October op, Seattle, 1983 B30 1.e4 c5 2.Nf3 Nc6 3.Bb5 Nf6 4.Nc3 Nd4 5.e5 Nxb5 6.Nxb5 Nd5 7.O-O a6 8.c4 Nb4 9.Nc3 Nc6 10.Re1 d6 11.exd6 e6 12.d4 cxd4 13.Nxd4 Bxd6 14.Nxc6 bxc6 15.Ne4 Be7 16.Qg4 Kf8 17.Qg3 Ra7 18.Bf4 Rd7 19.c5 Rd3 20.Be3 h5 21.Qf3 e5 22.Nd6 Bxd6 23.cxd6 Rd5 24.b4 Be6 25.Rac1 Qd7 26.Qe2 Kg8 27.Qxa6 Rxd6 28.Qa5 Bd5 29.f3 ½-½	Search games Games: 10666599 / Last update: 30 Jul 2025 GamePositionEndgames White Black Ignore colours ECO Year Result All 1-0 0-1 ½-½ Event Site Click below to set up a position to search for Set position Click the button below to select an endgame type
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