OnlySudoku

Step by step example of solving a level 5 (very hard) sudoku puzzle

Step 3

Let's look at the sudoku center box again (where DEF cross MNO). We can't put a 6 in cell DO because there's a 6 in the same row on cell IO. Therefore, the only available cell for a 6 in this box is cell DN.

1		7
5	4
		6

3

8	7

		1
3
8

2	step3: 6
9	5	4
7	1	3

		5
		8
4

	9	7

		6

5
	4	1
9		2

Choose the Step

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
19	20	21	22	23	24	25	26	27	28	29	30	31	32	33	34	35	36
37	38	39	40	41	42	43	44	45	46	47	48	49	50	51	52	53	54

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