Solo Mode

In solo mode, take a turn as usual, but before refilling the display discard the tile and the token furthest from the draw stacks (removed from the game), slide the remaining two tiles and two tokens away from the stacks to form two pairs, then draw 2 new tiles and 2 new tokens. You play exactly 20 turns and score as usual, with a 2-point bonus for each habitat whose largest corridor has 7 or more tiles.