OFFSET
1,1
EXAMPLE
Some solutions for 4X4
..1..2..2..1....3..4..1..4....3..2..4..4....1..4..3..3....3..2..3..2
..2..2..1..2....4..3..4..3....2..3..2..4....4..3..4..3....2..3..3..2
..2..1..2..2....1..4..3..3....4..2..3..2....3..4..3..3....3..3..2..3
..1..2..2..2....4..3..3..2....4..4..2..3....3..3..3..3....2..2..3..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 05 2011
STATUS
approved