% heyawake 159 by Halflength Sleeve, http://www.janko.at/Raetsel/Heyawake/159.a.htm
heyawake
very hard
36 20
+-----------------+-----+-+-----+---+-----+---+-------------+-----------+
|1................|1....|1|1....|...|.....|2..|.............|3..........|
+---+-------+-----+.....|.|.....|...+-----+...+---+-----+---+...........|
|2..|7......|4....|.....|.|.....|...|0....|...|1..|0....|...|...........|
|...|.......|.....|.....|.|.....|...|.....|...|...|.....|...+-----+-----+
|...|.......|.....|.....|.|.....|...|.....|...|...|.....|...|4....|3....|
|...|.......|.....+---+-+-+-----+...+-----+-+-+-+-+-----+---+.....|.....|
|...|.......|.....|3..|3........|...|.......|3..|.......|...|.....|.....|
|...|.......+-+---+...+---------+...|.......|...|.......|...|.....|.....|
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|...|.......|.|...|...|.........|...|.......|...|.......|...+-----+-+---+
|...|.......|.|...|...|.........|...|.......|...|.......|...|2......|3..|
+---+-----+-+-+---+---+---------+...+-----+-+-+-+-+-----+-+-+.......|...|
|3..|.....|9..........|3........|...|5....|...|4..|3......|.|.......|...|
|...|.....|...........+-----+---+...|.....|...|...|.......|.|.......|...|
|...|.....|...........|.....|...|...|.....|...|...|.......|.|.......|...|
|...|.....|...........|.....|...|...|.....|...|...+-------+-+---+---+---+
|...|.....|...........|.....|...|...|.....|...|...|4......|.|...|3......|
+---+-----+...........|.....|...|...+-----+---+...|.......|.|...|.......|
|.........|...........|.....|...|...|.....|2..|...|.......|.|...|.......|
|.........+-----+-----+-+-+-+-+-+...|.....|...|...|.......|.|...|.......|
|.........|4....|3......|0|...|.|...|.....|...|...|.......|.|...|.......|
+-----+---+.....|.......|.|...|.|...+-----+-+-+-+-+-------+-+---+-------+
|.....|...|.....|.......|.|...|.|...|2....|.|2..|7......................|
+-+---+...|.....|.......|.|...|.|...|.....|.|...|.......................|
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|.|...+---+---+-+-+---+-+-+-+-+-+-+-+-----+.+---+---+-+-+-----+---------+
|.|...|...|...|...|4..|2..|2|7....|.......|.|4......|.|.|3....|2........|
|.|...|...|...|...|...|...|.|.....|.......|.|.......|.|.|.....+-----+---+
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+-+---+---+-+-+---+...|...|.|.....+---+---+-+.......|.|.|.....|.....|...|
|.....|.....|0....|...|...|.|.....|...|5....|.......|.|.|.....|.....|...|
|.....|.....|.....|...|...|.|.....|...|.....+---+---+-+-+-+---+-----+---+
|.....|.....|.....|...|...|.|.....|...|.....|...|...|0....|...|3....|...|
+---+-+---+-+-+---+...+---+-+.....|...|.....|...|...|.....|...|.....|...|
|2..|2|2..|2..|...|...|3....|.....|...|.....|...|...|.....|...|.....|...|
|...|.|...|...|...|...|.....|.....+---+-----+---+---+-+---+-+-+-+---+---+
|...|.|...|...|...|...|.....|.....|1..|5..............|2....|2..|...|2..|
|...|.|...|...|...|...+-----+.....|...|...............|.....|...|...|...|
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+---+-+---+---+---+---+-----+-----+---+---------------+-----+---+---+---+
