Sentence 1: Gus looked at the chess board with great interest. 
 Sentence 3: His opponent tilted his head with interest 
 Sentence 4:  Gus thought more and went to grab his knight 
 Sentence 5:  The opponent gasped with this turn of events 
 Option 1: He moved his hand for a pawn but took it back. 
 Option 2: He moved his pawn forward one space.