OFFSET
1,4
EXAMPLE
Some solutions for 5X5
..0..0..2..2..3....0..0..1..2..2....0..0..1..1..0....0..0..1..3..0
..0..1..1..3..3....0..1..1..3..1....0..1..1..2..0....0..0..1..3..0
..2..1..1..1..1....1..1..1..3..1....1..1..2..2..3....1..1..2..2..3
..2..3..1..0..0....2..3..3..1..1....1..2..2..3..3....3..3..2..3..3
..3..3..1..0..0....2..1..1..1..1....0..0..3..3..3....0..0..3..3..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 09 2011
STATUS
approved