% heyawake 236 by Mokuani, http://www.janko.at/Raetsel/Heyawake/236.a.htm
heyawake
medium-
10 10
+---+---+---+-------+
|3..|1..|2..|1......|
|...|...|...+-------+
|...|...|...|2......|
|...+---+...|.......|
|...|3..|...|.......|
|...|...|...+-------+
|...|...|...|3......|
+---+...+---+.......|
|2..|...|4..|.......|
|...|...|...+-------+
|...|...|...|3......|
+---+...|...|.......|
|...|...|...|.......|
+---+...|...+---+---+
|2..|...|...|...|2..|
|...|...+---+---+...|
|...|...|.......|...|
+---+---+.......|...|
|1......|.......|...|
+-------+-------+---+
