2012 Warsaw Solving Grand Prix
4. Prize (version)
1.Qe1! ~ 2.Sf6+ K:e5 3.Qc3+ S:c3x
1...B:e5 2.Rhd6+ B:d6 3.Sc3+ S:c3x
1...R:e5 2.Se7+ R:e7 3.Sc3+ S:c3x
1...Bd8 2.Rcd6+ Kc5 3.Qc3+ S:c3x
1...Rf8(g8,e6) 2.Be6+ K:c6 3.Qc3+ S:c3x
1...S:e1 2.Sf4+ Kd4 3.c3+ S:c3x
1.Qa3? B:e5 2.Rd6+/Qd6+ 1...R:e5 2.Se7+/Rc4
1...Rf8(g8,e6) 2.Be6+ 1...Bd8!
square clearance, switchback, forced line opening
sx3 14+10 id=40