xs and os

SPOILER for ambiguities: X in R1/c3-R5/c7 + R1/c7-R5/c3, same Xs start in R2/c11, R5/c3, R11/c1, R11/c6, R11/c10.

Thanks Joe Tramp for hints.

Thanks for help.

Too much guessing and I can't even tell what it's supposed to be.

Thanks @Joe Tramp!! At first I thought you meant x those squares until I realised the name of the puzzle - got there eventually :-)

This is a hot mess. Wow.

No chance to solve it.