Göran Forslund, Sweden
3rd Prize Pocket pieces TT C 30.4.2002
1.pGf3? threat 2.Ge3#, 1...Gxd5!
1.pGg4? threat 2.Gg5#, 1...Gxe6!
1.pGd4? threat 2.Sef4#, 1...Gd6!
1.pGf6? threat 2.Sdf4#, 1...Gd6!
1...pNxy 2.(depends on xy, but always at least one mate)#
Author's explanation: a6, f1, e4, d5, e6, f5 and g7 are the only squares from
which a nightrider can't reach e5 in (at most) two moves. The first
six are already occupied. All white has to do is to put a piece on
g7, and black can not put the white nightrider anywhere without facing
mate in one...
I can't add too much. Again the idea is based on special pocket pieces property, this time slightly complicated by the fact
that both sides have the opposite-side pockets.