The above diagram is White to move and mate- taken from the Leonard Barden coloumn in the FT newspaper and is a fiendishly difficult problem to solve that no grandmaster solved when they took a look at it-it was composed(made up) by the once top grandmaster Vassily Ivanchuk can you solve it-i couldnt- answer here. 1 Rh4!! h6 2 Bh2 Kxd4 3 Ne5!! fxe5 4 fxe5#