the discoveries dont work coz of the pawn block, but if you count M2 its probably alot more than 6
€dit: by the way there is no analysis for this, so someone used this GPU based puzzle miner on it. M1 puzzles may have multiple solutions, all others should have unique solutions (also no simultaneous M2/M3 or so, its what @ benwerner and @ StinglerPuzzles taught me).
