Ioannis PapaioannouIoannis Papaioannou is a Greek chess grandmaster. He is a four-time Greek Chess Champion.Chess careerBorn in 1976, Papaioannou earned his grandmaster title in 1998. He won the Greek Chess Championship in 1997, 1998, 1999, and 2007. He is the No. 1 ranked Greek player as of 2023