White sacrifices a piece in the black kings's field and black pawn captures it self-blocking a flight.
See also: Active sacrifice.
Feather, Christopher John
Sinfonie Scacchistiche, U. Castellari MT, 1978
2nd Prize
1.Qh3
Se1
2.dxe1=R
Bg4#
1.Ra5
Rc1+
2.dxc1=R
Bb5#
Krizhanivsky, Vasil
G. Chumakov-70 JT, 2012
3rd Prize
1.Sc7
Be4
2.fxe4
Kc6#
1.Se7
Rd3+
2.cxd3
Kd6#
FEN: 2r2b2/8/pBBRp3/p1Kn1p2/p1p2p2/4kp2/3nq3/8