Key: 1.Bxf3! (thr. 2 Be2#) gxf3 2.Sxc3 g4 3.Sxa4 Kb5 4.Kb3 Ka6 5.c3 Kb5 6.c4+ Ka6 7.Sc3 a4+ 8.Kb4 a3 9.Sb5 cxb5 10.cxb5#
Sacrificial key. Model mate.
The problem has been reprinted here (2 Sept. 2008)
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Joaquim Crusats - original composition since 2007 -
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