Original sentence: 360 players took part, including 35 grandmasters and 66 international masters.His dazed opponent ended up signing the scoresheet, before recovering his wits and realising (too late) that it wasn't stalemate at all.The tournament was run as a 2-stage round-robin
Edited sentence: His dazed opponent ended up signing the scoresheet, before recovering his wits and realising (too late) that it was not stalemate at all.The tournament was run as a two-stage round-robin.Three-hundred-sixty players took part, including 35 grandmasters and 66 international masters