# Chess challenge from a newspaper in 1927 (win in 2 moves)

I have been trying to solve this for a long time, but can't find a solution. How can white force a checkmate in 2 moves?

1R6/4p3/2pkB3/4n1N1/8/1N2K1B1/8/8 w - - 0 1
• If only there was a way to stop 1... c5 ... Commented May 25, 2017 at 14:22
• You can solve a mate in two problem by trying every move for White.
– bof
Commented May 25, 2017 at 21:32
• @bof For this reason mate in two problems are actually quite good for practicing your calculation skills. I think Laszlo Polgar used to give such problems to his daughters when they were young. Commented May 25, 2017 at 22:22
• On good problems, it is rare that the first move is check. Commented May 25, 2017 at 23:07
• I dont think the OP is asking for mate in two moves; hes asking to find, within two moves, a forced mating variation (look at the wording!) Regardless, @Glorfindel has found a mate in two. Commented May 26, 2017 at 1:21

Ask yourself: what would Black do if he were to move? After 1... Kc7, 2. Bxe5 is mate. His other option is 1... c5, threatening to escape with 2... Kc6.

The solution:

1. Nc5! blocks the c-pawn. Black gets the additional option of 1... Kxc5, but after that, 2. Ne4 is mate.

(I can post an interactive version, but that doesn't work with spoilers. And it's a good visualization exercise.)

• There's a second solution . . . Commented May 26, 2017 at 16:29
• @pokep maybe; I didn't look any further than this one. If there is one, you can (should) post it as a second answer. Commented May 27, 2017 at 10:31
• >! Looks like 1.Nd4 Kc5 (or c5) 2.Ne4 is checkmate Commented May 28, 2017 at 14:52
• @RickG after 1. Nd4 c5 2. Ne4 the black king can escape (temporarily) to c7. Commented May 28, 2017 at 16:25
• @Glorfindel yup, missed that! Commented May 30, 2017 at 2:09