Yves Cheylan
Probleemblad 1979		  
B7/6p1/3p2N1/3r4/6p1/2K1Bkrq/b1Q2P2/4RR2

1.Ld4! [2.De4‡]

1…Kg2+ 2.f3‡

1…Lb1 2.L×d5‡
Wit geeft mat in 2 zetten