Estudio de Dmitry Petrov (1973)

Blancas juegan y ganan 

- 1er premio -

1.Te6+ Rf7 2.Ce5+ Rg8 3.d6 [ 3.Tg6+ Rh8 4.d6 Txd6 5.Txd6 cxd6 6.Cg6+ Rg8 7.Ad5+ Tf7 8.Axb3 d5 9.Axd5=] 3...cxd6 [ 3...b2 4.Tg6+ Rh8 5.Ad5 b1=D 6.Tg8+ Txg8 7.Cf7#] 4.Tg6+ Rh8 5.Tg8+ Rxg8 6.Ad5+ Tf7 7.Cxf7 Te8 [ 7...Tb8 8.Ce5+ Rf8 9.Cd7+] 8.Ce5+ Rf8 9.Cg6++ 1–0