Mate Puzzle (1203)

After the setup move Nxe1, it is Black to move. Find the forcing continuation before checking the solution.

Position after Nxe1. Black to move.

Puzzle ID

0ibg7

Rating

1203

Side to move

Black

Themes

Mate, Mate in 1, Middlegame

Material

White is ahead by 4 points

FEN

4r3/6k1/pQb2qp1/8/1p1p4/PB5R/1PP5/2K1NnR1 b - - 0 42

What to look for

Calculate a forcing checkmate sequence.

42... Rxe1#

The full forcing line from the source position is:

42. Nxe1 42... Rxe1#