Mohammed Ahmed Al-Modiahki (Arabic: محمد أحمد المضيحكي; born June 1, 1974) is a chess Grandmaster.

At the 32nd Chess Olympiad in 1996 and he won the gold medal for his individual performance on the first board, scoring 8/10.

He played four times in the knock out stages of the FIDE World Chess Championships in Las Vegas (1999), New Delhi (2000), Moscow (2002) and Libya 2004.

[4] He won the Arab Chess Championship on four occasions: in 1994, 1997, 2000 and 2002 (shared with Hichem Hamdouchi).

In 2001, he married Grandmaster Zhu Chen, who now also plays for Qatar.