5B1b/2NRPp2/1p1N1k1P/1qP4B/Q2P2pK/1bnP2P1/7P/4r3 w - - 0 1
White to move!
Haworth, 1.h3 Qd3 2.Nce8 followed by 3.Bxf7#
if 1 .... Qxd3 doesn't that prevent mate in 3 ?
I just now looked at your addition to the Didukh puzzle, and it is the main line and correct.
I try to solve chess puzzles every day. I have been solving puzzles from the book 1000 chess problems by J.Vladimirov.
Yancey, I wrote an extra line in difficul endgame by Sergei Didukh
If you have done enough of these short mate puzzles, you kind of know what weaknesses the composers are taking advantage of in fooling you. This puzzle is a good example- it really isn't thinking outside the box to find the first move, but you do have to be mentally flexible to find it.
That is a mate, but not the shortest.