Then exf6, If takes back Exc7
Bulldog chess with Guard and Elf TonyL103 - evert823

From the first game I don't see evert getting behind by more than a minor piece. One continuation is:
BxG...Rb8
exf6...RxB
fxe7...Nxe7
(c7 pawn is protected by R). (Black behind by guard)
Normally I go for at least a draw when behind by a minor piece. But maybe evert knows Tony to be very accurate, and uses a small advantage to always get the win? Not sure.

Sorry to interrupt your game. But I do like the elf piece. Have fun and Merry Christmas/ Happy Holidays.
I don't understand why Black resigned. Black loses the guard. Is there anything else going on?
Cool graphic for the elf BTW.