Former champion checkers Ton Sijbrands (on screen) during his attempt to a world record simultaneous blind checkers in the Olympic Stadium in Amsterdam, on September 29, 2009. Sijbrands sits in a closed area without draughtboard, and plays against 28 contestants. The current record is in hands of Dutch Erno Prosman who played against 27 opponents. Sijbrands had been world champion against 25 opponents. Getty Images logo Getty Images 4 months ago

Former champion checkers Ton Sijbrands (on screen) during his attempt to a world record simultaneous blind checkers in the Olympic Stadium in Amsterdam, on September 29, 2009. Sijbrands sits in a closed area without draughtboard, and plays against 28 contestants. The current record is in hands of Dutch Erno Prosman who played against 27 opponents. Sijbrands had been world champion against 25 opponents.