% heyawake 170 by Halflength Sleeve, http://www.janko.at/Raetsel/Heyawake/170.a.htm
heyawake
very hard
36 20
+-----+---+---+---+---+-----+---+---+---+-----+-----+-------+-----+-+---+
|.....|3..|...|...|2..|.....|2..|3..|3..|3....|2....|.......|.....|.|...|
+-----+...|...|...|...|.....|...|...|...|.....|.....|.......+-----+.|...|
|2....|...|...|...|...|.....|...|...|...|.....|.....|.......|0....|.|...|
|.....|...+---+---+---+---+-+---+...|...+-----+---+-+---+---+.....|.|...|
|.....|...|.......|...|0..|.....|...|...|.....|6..|0....|...|.....|.|...|
+-----+---+---+---+...|...|.....|...|...|.....|...|.....|...+-----+-+---+
|4....|...|...|...|...|...|.....|...|...|.....|...|.....|...|5......|...|
|.....|...|...|...|...|...+-----+...|...+-----+...+-----+---+.......+---+
|.....|...|...|...|...|...|.....|...|...|0....|...|3........|.......|3..|
|.....|...|...|...|...+---+.....+---+---+-----+...|.........|.......|...|
|.....|...|...|...|...|...|.....|2......|.....|...|.........|.......|...|
+-----+-+-+---+---+...+---+-----+-----+-+.....|...+-----+---+.......|...|
|.......|4....|4..|...|...|4....|.....|.|.....|...|4....|2..|.......|...|
|.......|.....|...|...|...|.....|.....|.+-----+...|.....|...+-----+-+---+
|.......|.....|...|...|...|.....|.....|.|.....|...|.....|...|6....|.|2..|
|.......|.....|...|...+---+.....|.....|.|.....|...|.....+---+.....|.|...|
|.......|.....|...|...|2..|.....|.....|.|.....|...|.....|4..|.....|.|...|
+-------+-----+...|...|...+---+-+-+---+.+-----+---+.....|...|.....|.|...|
|1......|.....|...|...|...|...|...|0..|.|7........|.....|...|.....|.|...|
+-------+.....|...+---+-+-+...|...|...|.|.........+-----+...|.....+-+---+
|2......|.....|...|.....|2|...|...|...|.|.........|4....|...|.....|.....|
|.......+-----+...|.....|.|...|...|...|.|.........|.....|...|.....+-----+
|.......|.....|...|.....|.|...|...|...|.|.........|.....|...|.....|.....|
|.......+-----+---+-----+.+---+---+---+-+.........|.....|...|.....|.....|
|.......|0....|...|.....|.|.......|...|3|.........|.....|...|.....|.....|
+-------+.....|...+---+-+-+.......|...|.|.........|.....|...|.....|.....|
|3......|.....|...|2..|...|.......|...|.|.........|.....|...|.....|.....|
|.......+-+---+---+...|...+---+---+...|.+---+---+-+-----+---+-----+-----+
|.......|.|.......|...|...|0..|...|...|.|2..|2..|2......|...|...........|
+---+---+.|.......|...|...|...|...|...|.|...|...|.......|...|...........|
|0..|...|.|.......|...|...|...|...|...|.|...|...|.......|...|...........|
|...|...|.+-------+---+---+-+-+---+---+.|...+---+---+---+-+-+---+-------+
|...|...|.|2......|.........|4........|.|...|4......|...|.|.|1..|.......|
|...|...|.|.......+---+-----+.........|.|...|.......|...|.|.|...+-------+
|...|...|.|.......|...|3....|.........|.|...|.......|...|.|.|...|0......|
+---+...+-+---+---+...|.....+-----+---+-+---+.......+---+-+-+---+-------+
|...|...|3....|...|...|.....|.....|2..|2....|.......|...|2..|...........|
|...|...|.....|...|...|.....|.....|...|.....|.......|...|...|...........|
|...|...|.....|...|...|.....|.....|...|.....|.......|...|...|...........|
+---+---+-----+---+---+-----+-----+---+-----+-------+---+---+-----------+
