Brustman played on the Polish team in nine Women's Chess Olympiads (1980–96). Her best result was in the 1980 Olympiad (Valletta), when she scored 8 points out of 11, winning individual silver medal at fourth board and team bronze medal.
She was European Junior Women's Champion in 1980 and World Junior Women's Champion in 1982. She also competed in the Women's World Championship, twice taking sixth places in Candidates tournaments, at Malmö 1986 and Chaltubo 1988.
Brustman won the Women's Polish championships four times (1982, 1984, 1987, and 1996) and took second (1980 and 1989) and third places (1983 and 1995) in these competitions.
Notable chess games
- Agnieszka Brustman vs Nona Gaprindashvili, Ckhaltubo (Georgia) 1988, Candidates tournament, Caro-Kann Defense, B12, 1-0
- Agnieszka Brustman vs Alisa Galliamova-Ivanchuk, Azov 1990, Sicilian, Richter-Rauzer Attack, B66, 1-0
- Bartelski, Wojciech. "Women's Chess Olympiads: Agnieszka Brustman". OlimpBase. Retrieved 2009-07-08.
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