of the
Week
|
Problem
of the Week |
PROBLEM 221
The
Sudoku Jr. puzzle is a 4 ´ 4 array where each row,
each column, and each 2 ´ 2 corner square contains
the numbers 1, 2, 3, 4 exactly once; see an example on the left. How many
distinct Sudoku Jr. puzzles are there?
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ã2005 Alberto L. Delgado