With his last move H2+4 Black wants to simplify the position. Red has to accept that some pieces have to leave the board, he has to look for the best transformation. At first sight it might seem that Red can only reach endgames with a material combination which looks drawish. But it's not enough to count the pieces directly after the exchange, Red can transform the position into an endgame Horse vs. 2 advisors where Black's pieces are badly coordinated. Consequently Black loses one of his advisors and the endgame with one advisor against a horse is lost.

Most of Red's pieces are very active and Black's king is in a vulnerable position but both of Red's rooks are under attack and Red can't play 1. C3-1?? because of 1. ... R6+7 checkmate. With a sacrifice of his passive rook Red eliminates Black's dangerous horse and wins time for a decisive attack of his remaining pieces.

Red shouldn’t waste too much time and find a quick checkmate. As so often, Red has to clear the central file allowing Red’s king to help in the attack.