[Community Puzzle] Mini Sudoku Solver

Puzzles
1

puzzle:

@nicola
hello, i create the topic because it does not exist.
for one time i get 100% submition, and 80% on ide.
On the test3, i found multiple solutions:
entry

0000
2014
3021
0000

my possible result (?)

1243
2314
3421
4132

result expected:

4132
2314
3421
1243

i found a lot other results. don’t know if it is me or the puzzle.
so, i miss something ? or the puzzle has multiple solution ?
thanks.

2

Your possible result isn’t correct - none of your 2x2 corner squares are valid.

2 Likes
3

sorry i did not know this rule … thanks @RoboStac

4

I note that there are now 9x9 and 16x16 sudoku solver problems, which have been considered “Medium” (correctly, I believe). So it seems strange that the smaller 4x4 solver would be rated as “Hard”. I think some of the older “Hard” problems I’ve tried recently (Hungry Duck, Elevator, Seven Segment Display) are also much less difficult than advertised.

5

Some puzzles were wrongly classified when difficulty classification was first introduced and CodinGame classified all existing puzzles using an algorithm instead of manually.

1 Like