Key: 1.Sb2! Rxg7 2.Sc4 bxc4 3.Bc2 Rg6 4.fxg6 d5 5.Bf5 d4+ 6.Kxc4 c5 7.Bd7# 6…fxg6 7.Bxg6# 3...Rg1 4.Ba4 Rc1+ 5.Kb2 Rb1+ 6.Kxb1 c3 7.Bxc6# 5...Rc2+ 6.Kxc2 c3 7.Bxc6# 5...c3+ 6.Kxc1 c2 7.Bxc6#
Two model mates amongst the variations.
Joaquim Crusats - original composition since 2007 -