The Grandmaster<br>It had all come down to this for Demetri. There were only a few moves left. He put his queen into place and waited. His opponent fell for the trap. Checkmate, Demetri had won!
His opponent was a rookie player.
Given the context of the statement there is nothing indicating if he is a rookie player or not.
( z1 person :ARG0-of ( z2 play ) :mod ( z3 rookie ) :domain ( z4 person :ARG0-of ( z5 oppose :ARG1 ( z6 he ) ) ) )