Tries: 1.Qa7/Qa5/Rxa3? but 1…d3! 1.Ba2?+ but 1…Kxc2! 1.Sf3? but 1…exf3! Key: 1.Qf8! (thr. 2.Qxa3#) Sxc2+ 2.Bxc2+ Kxc2 3.Qb4 (thr. 4.Qb1#) Kd3 4.O-O-O#
Belen-Pseudokegel theme.
For more information on the Belén "ornamental effect" see Tim Krabbe's item 253 and chessproblem.net.
