@Seetharaman: I don't understand what you mean about shifting d7 to f7. The bPd7 is necessary in order to block…
Can d7 be shifted to f7?
However it is a pity that after 1...Kxe7, 2.Qxc5 would not be mate anyway.
An interesting problem with a good flight-giving key. The dual avoidance uses 3 different mechanisms: opening of black line, guard…
There is also a kind of exchange of places: The rook goes to d4 and then to f4 The bishop…
Thanks Julia for accepting our new version. Two sets of underpromotions make the problem complete!
I thought Popeye checks it.
Yes, indeed, 15 units are visible, because it is this position which I verified with Jacobi.
One way to get an animated solution *and* undefined pieces is to end with a dummy move that turns the…
X1XXXX1X/XXXXkXXX/8/8/8/8/XXXXXXXX/X1XXXX1X PG 6.0 & #1. Where are the horses?