1.a6 bxa6 [ 1...e1=D 2.axb7 Dxf2+ 3.Rc6 Dc2+ 4.Rb6 Df2+ ( 4...Db1+! 5.Ra7 ( 5.Rc5 Db4+ 6.Rd5 Dd2+ 7.Rc6 Dc3+ 8.Rb6 e3 9.b8=D Db4+ 10.Ra7 Dxb8+ 11.Rxb8 e2 12.Cxf5 e1=D 13.Cd6 Db4+ 14.Cb7 Rb5–+) 5...e3 6.b8=D Dxb8+ 7.Rxb8 e2 8.Cxf5 e1=D 9.Cd6 Db4+ 10.Rc8 Dxf4–+) 5.Ra6 Df1+ 6.Ra7; 1...b6+ 2.Rc6!+-] 2.Aa5! [ 2.Cxf5 (dual) 2...e1=D 3.Cg4 Dc3+ 4.Rd6 Df3 5.Cge3 Dxf4+ 6.Rc6 Df2 7.Ab6 Dxa2 8.Cd6] 2...Rxa5 3.Cd1! [ 3.Cc4+? Ra4 4.Cd1 exd1=C!] 3...exd1=D [ 3...exd1=C 4.Cxf5 e3 5.Cd4 Cc3 6.f5 e2 7.Cc2; 3...e1=D 4.Cc4+ Ra4 5.Cdb2#] 4.Cc4+ Ra4 5.Cb2+ Ra3 6.Cxd1 ½–½