Congratulations to Chessaholic and Likesforests, who demonstrated that they were able to "outsolve" me in yesterdays exercise. Although there is not much I can add to Likesforests comprehensive solution (with the exception of a mate in 1 he missed), I will give the solution here again, and add a few diagrams. In this way I make it more comfortable for you (other) readers to see what chesscaholic and Likesforests came up with.
This was the position I asked you to solve yesterday. It is black to play and win.
The solution is 1 ... g3 2 Nf3+ (2. Nf1 Bxf2+ 3. Kh1 g2+(see next diagram)
And in this sideline after 4.Kh2 best is 4 ... g1Q and mate. 4 ... gxf1B was given by Likesforests. It is less effective than mating immediately. But his variation has the attraction of the very rare occurrence of a minor promotion to a Bishop. So an A+ for creativity for you Likesforests!) 2... Kg4 3. Nxd4 h2+
Analysing this position in my minds eye, I failed see how black can win after 4 Kg2. But in fact it is very simple now. 4... gxf2
This is what I missed and what Likesforests so appropriately calls a "split"! 5. Nf3 h1Q+ 6. Kxh1 f1Q+ 0-1
Tomorrow I will return to this exercise and share some of my reflections on the fact that I failed to find a solution (and why Chessaholic and Likesforest did).