Today’s 5-second tactic

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THE ‘ZWISCHENZUG’
im Roeder, Mat
gm Spraggett,Kevin
From today’s morning round of the Cappelle La Grande tournament. Position after White’s 17th move (17.e5). The game is about even. I was now expecting 17…PxP 18.Nxe5 followed by doubling Rooks on the e-file and playing f4, anchoring the Knight. INSTEAD, my opponent surprised with
17…Bxf3?

The german IM had calculated 18.PxN?! BxR! hitting the Queen, when Black ends up an Exchange to the good.
WHITE TO PLAY AND WIN!
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SOLUTION
Spraggett,K–Roeder,M: 18.Ra1!! winning a piece! The game continued 18…Qb6 19.PxN! and Black resigned