No.1748 (JC&BM)

a) {Because c5bP is a shadow-piece (illegal-piece), there can be no solution (shadow-solution): 1.Bf8 gxf8=Q 2.c4 Qa3# The d5bP is legal-piece, so the solution is:} 1.Bg8-h7 g7-g8=Q 2.d5-d4 Qg8-a2 # b) bPc5<-->bPd5 {Because d5bP is a shadow-piece (illegal-piece), there can be no solution (shadow-solution): 1.Bh7 g8=Q 2.d4 Qa2# The c5bP is legal-piece, so the solution is:} 1.Bd6-f8 g7*f8=Q 2.c5-c4 Qf8-a3 #