Sitstart. This boulder is slightly overhanging. You start with both hands on the first big flake and move to the second one with intresting moves. Topout is friendly for hands and feet.
Rain sucks, but broken holds suck even more. Remember, never climb on wet rock in Fontainebleau.
The sandstone becomes brittle, and pulling on it will ruin classic problems. Drying it doesn't help, because it's still wet and weak inside.
All you can do is wait for better conditions.