It seemed to me at the time that my opponent must have looked at the previous round's game (Annotated Game #107) as part of his preparation. The idea of playing the ...e4 advance as in the previous game could perhaps be improved by preventing the response Ng5 (which wins a pawn by force). This appeared to be the idea behind Black's 4...h6 in this game, which otherwise has little point. The opening takes a very different path from the previous game, but unfortunately I make some similar kinds of errors, including following a dubious and uncertain plan, which allows Black to take over the initiative and create too many threats for me to find my way through.
In general, I felt that my last two opponents were better focused during the games and wanted to win more than I did, so by that measure they certainly deserve their results. I hope to do better on that score in my next games.