Gambling for LP? Don't like it. There shouldn't be a way to transfer LP from one active character to another.
Summonable cheating scents? wtf? How is that a criminal act?
Based on what we've got in the game now, we can already play checkers:
1. Dig out a cellar or two to get 24 Huge Boulders and turn half into Runestones (any other two sets of 12 liftable 1x1 objects would work too)
2. Decorate an 8x8 area with a checkerboard using Lay Stone and/or Lay Brick
3. Use the "Lift" command to move pieces
To play chess we just need 1x1 white and black chess pieces carvable from huge boulders.
But I guess technically we can just use different liftable objects... it would be annoying to remember, though.
edit: another (easier) way to play checkers in haven:
