% heyawake 61 by Warai Kamosika, http://www.janko.at/Raetsel/Heyawake/061.a.htm
heyawake
hard-
18 10
+-----------------+---+-----------+-+
|1................|1..|2..........|3|
+-----+-------+-+-+...+-----+---+-+.|
|.....|3......|3|.|...|.....|2..|1|.|
+-----+.......|.|.+---+.....|...|.|.|
|1....|.......|.|.|3..|.....|...|.|.|
|.....+-------+.|.|...|.....|...|.|.|
|.....|1......|.|.|...|.....|...|.|.|
+-+---+---+---+.+-+...+-----+...|.|.|
|1|.......|1..|.|1|...|4....|...|.|.|
|.|.......|...|.|.+---+.....+---+.|.|
|.|.......|...|.|.|...|.....|...|.|.|
|.+-----+-+-+-+.+-+...|.....|...|.|.|
|.|2....|...|.|.|.|...|.....|...|.|.|
+-+---+-+---+-+.+-+---+---+-+-+-+.+-+
|.....|3......|.|.|1......|1..|.|.|.|
|.....|.......+-+-+---+-+-+...+-+.|.|
|.....|.......|1......|.|1|...|.|.|.|
+-----+-------+---+---+-+.+-+-+.|.+-+
|1................|2....|.|.|1|.|.|.|
+-----------------+-----+-+-+-+-+-+-+
