XMAHJONGG 3.6.6.6 is a spin-off of XMAHJONGG 3.6.1 by Eddie Kohler.

Extra flags:
-q: turns the game a quarter turn (90 degrees).
XMAHJONGG 3.6.6.6 allows any board by default, as opposed XMAHJONGG 3.6.1.

Extra keys:
t: tests the board on its current position 
$: resets the board (immediate repress will undo)
g: toggle autohint on second tile
b: toggle autoclean
m: toggle showing (number of) matches
+: increase clean/solution speed
-: decrease clean/solution speed
The s key works differently: it only starts playing a solution if the current
position has a solution. Furthermore, the solution speed is controlled by + and
-.
The goal is to clean the board. If this is impossible and the test key t (or the
test button) is pressed twice at the beginning, the goal becomes to get as far
as possible.
