There are only ten possible moves.
DON'T mate in one - a puzzle

It's not mate-Black has one legal way to get out of check, which is Rxh7.
The point of the puzzle is to NOT mate in one.

took me a while since there was multiple ways
I found only Rc6+. Which others did you see?

Do this problem. The goal is to NOT mate in one. Credit to Karl Fabel, a German chess problemist.
I think I posted this one too....

Took me maybe 10 seconds. Not as hard as I expected it to be.
Usually I'm terrible at unorthodox chess puzzles.

any move for the rook on the 6 rank
Putting the rook on c6 blocks the a8 bishop.

any move for the rook on the 6 rank
I only see Rc6+ other rook moves and black cannot capture at h7 as the king will be in check. something im missing? OP says 10 possible moves

any move for the rook on the 6 rank
I only see Rc6+ other rook moves and black cannot capture at h7 as the king will be in check. something im missing? OP says 10 possible moves
Moves that can be made, not moves that solve the puzzle. You're good.

any move for the rook on the 6 rank
Those leave the b7 rook pinned, preventing capture of the h7 bishop.

any move for the rook on the 6 rank
I only see Rc6+ other rook moves and black cannot capture at h7 as the king will be in check. something im missing? OP says 10 possible moves
Moves that can be made, not moves that solve the puzzle. You're good.
i see, hahaha tnx! i thought 10 possible solutions
Do this problem. The goal is to NOT mate in one. Credit to Karl Fabel, a German chess problemist.