Consider a sport Chess--, which is very similar to chess, except that before making each move, the player rolls a 100-sided die, and if it comes up 100 they ins

Consider a sport Chess--, which is very similar to chess, except that before making each move, the player rolls a 100-sided die, and if it comes up 100 they instantly win. If Magnus Carlsen plays Chess-- against me, and is one move away from checkmate when I throw the 100, did the best player win?