Literally a mate in 1 BUT your only move is checkmate - Player Shmopped

Round 1 - Group 40		1	2
1	LacoIvan (1385)		1 0	1	1
2	Shmopped (400)	1 0		1	1

Round 2 - Group 22		1	2
1	MACHDelgado (1529)		1 0	1	1
2	Shmopped (400)	1 0		1	1

Round 3 - Group 16		1	2
1	exceptionalfork (1572)		1 0	1	1
2	Shmopped (400)	1 0		1	1

Round 4 - Group 13		1	2
1	NM 3Ke31-0 (1589)		1 1	2	0
2	Shmopped (400)	0 0		0	0