Hello Puzzlers, Well, this was a very tricky problem to crack. I apologize for getting this out so slowly, but I have been going through Paul's commentary. I encourage everyone to read Paul's in depth analysis of this problem as there is a lot going on here. I also want to thank Rod for his help with the Fritz analysis of the problem. As usual, my brief comments follow. The best move is: 1... Rxg3+ Principle: Despite white's advanced pawns on d7 and e6, black has time to grab a pawn and set a trap by offering a gift. 1... Rxg3+, wins a pawn and sets the trap. If White takes the poison gift Rook: 2. hxg3 Qxg3+, and White can only move the King or block check. If he moves: 3. Kh1 Qh3+, the noose tightens. 4. Rh2 Qxf1+, and tightens. 5. Qg1 Qxg1#, and its all over. If white blocks the check: 2. rg2 rxg2+, with a queen behind, he simply takes the Rook. 3. Kh1 Rxh2+, whites moves are all forced. 4. Kxh2 Qg2# White avoids the trap with: 2. Kh1