Enigma 1474: Nativity places
14 January 2013
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From New Scientist #2635, 22nd December 2007
Miss Amber is holding the dress rehearsal for the school Nativity play. The choir has 81 children, consisting of 9 each of angels, barn owls, chickens, dogs, ewes, farmhands, goats, horses and innkeepers. She marked out a 9×9 grid on the stage and some of the children are already in the grid (below).
Surprisingly, Miss Amber was able to add the other children to the grid, making sure each row, column and 3×3 box contains all the 9 characters. Find the 3×3 box in the bottom left-hand corner of the finished grid.