Roy Ludlow versus Richard Carver

What's this? Richard Carver beaten at Trowbridge Chess Club? Again? (I believe this last occurred in 2011.)

Can you spot what White played in this position?

r4r2/2q1b2k/p1b1p2p/1p2Np2/3PpP1Q/1PP1R3/PB3K1P/R7

Only one move wins here, and Roy comes up with a corker.