No.1776 (GM)

{ Solution sent by Author: 1. Dg8? 1.-Da5! 1. Le6? 1.-D:b5! 1. g8D? 1.-D:e4! 1. g8L! 1.-Da2/Db3/Dc4/Da1/Da3/Da5/Da6/Da7/Da8/Db4/Dd4/D:e4/Dc2/ Dd1/D:b5 2. L:a2/L:b3/L:c4/T:a1/b:a3/D:a5/b:a6/L:a7/D:a8/c:b4/L:d4/S:e4/T:c2/ T:d1/L:b5 Full solution with animation:} 1.g7-g8=B ! zugzwang. 1...Qa4-d1 + 2.Rc1*d1 = 1...Qa4-c2 2.Rc1*c2 = 1...Qa4-b3 2.Bg8*b3 = 1...Qa4*b5 2.Bd7*b5 = 1...Qa4-a1 2.Rc1*a1 = 1...Qa4-a2 2.Bg8*a2 = 1...Qa4-a3 2.b2*a3 = 1...Qa4-a8 2.Qd8*a8 = 1...Qa4-a7 2.Bc5*a7 = 1...Qa4-a6 + 2.b5*a6 = 1...Qa4-a5 2.Qd8*a5 = 1...Qa4*e4 2.Sg3*e4 = 1...Qa4-d4 + 2.Bc5*d4 = 1...Qa4-c4 2.Bg8*c4 = 1...Qa4-b4 2.c3*b4 =