Spectacular work. But the theme (a-AB, b-BC, c-CA --> a-C, b-A, c-B) has been already processed, see YACPDB Id 330467.
With the pawn on c2, it would be a 2-solution 1->ser-h#7.
As Shankar pointed out to me, the stipulation can also be W1->sh#7 setplay. No twin will be necessary with the…
Solution of 3 (corrected): 1.Kb7 Kb7×La8→e1 Dc8-b8+ 2.Kc6-b7 Db7-c8/Lb7-a8 3.Se8-d6 & forward: 1.Kc6-d7#
Yes, you're right. My hands were faster than my head.
Since the last white move was a pawn move, black can't make a pawn move.
Why cook? The final position in the "cooked" solution is not mat. Any black pawn move is a sufficient defense.…
Yes this is a valid cook! François Labelle found almost the same one.
I'm far from being an expert in that field but this looks as a cook-solution to me. Well found!
A solution can be: 1.d4 Nc6 2.e4 Nd4 3.Qd4 Nf6 4.e5 Ne4 5.e6 Nc3 6.Qg7 Nd1 7.ef7#. However, it is…