% heyawake 121 by Mokuani, http://www.janko.at/Raetsel/Heyawake/121.a.htm
heyawake
easy+
10 10
+---+---+-+-----+---+
|1..|2..|.|.....|0..|
|...|...|.|.....|...|
|...|...|.|.....|...|
+---+...+-+---+-+---+
|2..|...|2....|3....|
|...+-+-+-----+.....|
|...|2|4......|.....|
|...|.|.......+-+---+
|...|.|.......|1|...|
+---+.|.......|.+---+
|1..|.|.......|.|...|
+---+-+.......|.|...|
|.....|.......|.|...|
|.....+-----+-+-+...|
|.....|0....|...|...|
+---+-+---+-+...+---+
|1..|3....|.|...|2..|
|...|.....|.|...|...|
|...|.....|.|...|...|
+---+-----+-+---+---+
