Complex sentence: MChess Pro was one of the strongest chess chess programs of the 1990s and in the 10th AEGON event at the Hague in 1995, MChess Pro defeated three grandmasters and achieved a performance rating of 2652 ELO.
Split into simpler sentences: MChess Pro was one of the strongest chess chess programs of the 1990s. In the 10th AEGON event at the Hague in 1995, MChess Pro defeated three grandmasters and achieved a performance rating of 2652 ELO.