a)diagram: R#10*
Set play:
1…Gc4 2.G×d3 Sb5 3.G×d2 G×c7+ 4.Gf8 G×b6
5.G×b5 G×b4 6.G×d7 G×d2 7.Gf5 S×e2 8.G×f7 G×e6
9.Gf3 G×f3 10.G×d4 B×d4#
Try:
1.G×d3?
But: 1…Gc4!
Solution:
1.G×d1!
1….Gc4 2.G×d4 Sb5 3.G×b5 G×c7+ 4.Gf8 G×b6
5.G×b6 S×e2 6.G×d3 G×e6 7.G×d8 B×d4+ 8.G×d4 G×d4
9.G×d7 Gg1 10.Gf3 Sg4#
b)+wQd5, +wPf2 S#15
1.G×d1!
1....Gc4 2.G×d2 Sb5 3.G×b5 G×c7+ 4.Gf8 G×b6
5.G×b6 S×e2 6.G×d3 K×b7 7.G×d4 c×d2 8.Gf3 G×e6
9.Gf5 B×d4+ 10.Q×d4 G×f5 11.Q×e3 G×f8 12.Q×d2 Gg1
13.Q×c2 S×f4 14.K×e4 Gg8 15.Gh1 Gg6#