% heyawake 68 by Grant Fikes, http://www.janko.at/Raetsel/Heyawake/068.a.htm
heyawake
medium-
18 10
+-------+---------+-----------------+
|1......|2........|3................|
+-------+-------+-+---+-----+-----+-+
|...............|2....|a....|1....|1|
+---+-------+---+.....|.....|.....|.|
|2..|.......|2..|.....|.....|.....|.|
|...|.......|...|.....|.....|.....|.|
|...|.......|...|.....|.....|.....|.|
+---+---+---+...+-----+.....+-----+.|
|...|2..|...|...|5....|.....|5....|.|
+---+...+---+...|.....|.....|.....|.|
|2..|...|1..|...|.....|.....|.....|.|
|...|...|...|...|.....|.....|.....|.|
|...|...|...|...|.....|.....|.....|.|
+---+---+...+---+-----+.....+-----+-+
|0..|...|...|3..|.....|.....|.......|
|...|...|...|...|.....|.....+-------+
|...|...|...|...|.....|.....|.......|
|...|...|...|...|.....|.....|.......|
|...|...|...|...|.....|.....|.......|
+---+---+---+---+-----+-----+-------+
