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Even Corners and Equal Subgrids (Posted on 2009-08-18) Difficulty: 2 of 5
Each of the capital letters in bold in this 3x3 grid is to be substituted by a different digit from 1 to 9 such that :
  • Each of A, C, G and I is even, and:
  • The sum of the digits in each of the four 2x2 subgrids is equal.
A   B   C
D   E   F
G   H   I

Disregarding the rotations and reflections, how many distinct solutions are there?

See The Solution Submitted by K Sengupta    
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Comments: ( Back to comment list | You must be logged in to post comments.)
re: computer solution | Comment 2 of 5 |
(In reply to computer solution by Daniel)

You forgot to make the corners even.
Looking at your list I see only
 2  5  4
 9  3  7
 6  1  8

Which does have equal sums of 19.

Edited on August 18, 2009, 2:06 pm
  Posted by Jer on 2009-08-18 14:05:40

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