Mate Puzzle (1141)

After the setup move c3, it is Black to move. Find the forcing continuation before checking the solution.

Position after c3. Black to move.

Puzzle ID

0orSc

Rating

1141

Side to move

Black

Themes

Mate, Mate in 2, Middlegame

Material

White is ahead by 7 points

FEN

2r5/pp2k2p/3p1p2/3Ppb2/7Q/2P1qN2/PP1N2P1/2KR3R b - - 0 25

What to look for

Calculate a forcing checkmate sequence.

25... Rxc3+ 26. bxc3 26... Qxc3#

The full forcing line from the source position is:

25. c3 25... Rxc3+ 26. bxc3 26... Qxc3#