"Life is like a jigsaw puzzle, you have to see the whole picture, then put it together piece by piece!" Terry McMillan. Difficulty : ** Tested, logical. One micro-reasoning can be useful. Good blackenage.
One help with the micro-reasoning: the 2 in R3 would allow you to place two helpful crosses in R2.
Le hanjie, c'est le contraire...
Merci