This is the Untouchable 11 Master Challenge, based on the original Untouchable 11 puzzle by Peter Grabarchuk. The goal is to put these 11 hexominoes within the board so that no two touch each other even at a corner. It has 2 solutions.
A playable app of this puzzle is now available
here.
You can play the original Untouchable 11 puzzle
here. The hardest version of that puzzle has 7 solutions.