My opponent was a boy and I got Black. He deviated from the main line of Ruy Lopez and I missed a tempo to play c5. He made some demonstration on the kingside, but missed Ng4+.

I underestimated his “h” pawn movement, had to play h5 to stop it or g5 after h5. I missed that he could play Ng5 after exchange on g6. I realized that I got into a trouble, saw him taking on e6, then Bb3, then exchange sacrifice on h6, but thought that after Qg4 my g6 pawn will be defended.

So I hurried to play Rf8 instead of Re7 leading to an equal position after Rxh6 . After 32… Rf8 33. Rxh6 my position became indefensible and I resigned after 10 moves.