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[coach]

What is the next logical number ?? and why???

4 9 6 - 7 3 X - 1 8 X
5 X X - X X X - 3 4 X
X 3 8 - X X 4 - 9 X X

3 4 5 - X X 7 - 6 2 X
8 2 9 - 6 4 3 - 7 5 1
7 6 1 - 5 X X - 4 3 X

X X 4 - 8 X X - 2 9 3
X 8 X - 3 X X - 5 1 4
X 5 3 - 4 X 1 - 8 X X

[someone_somewhere]

Hi,

7 not in r2c9, it is in r3c8 or r3c9 (Row on 3x3 Block interaction)
2 not in r1c6, it is in r2c4 or r3c4 (Column on 3x3 Block interaction)
2 not in r2c5, it is in r2c4 or r3c4 (Column on 3x3 Block interaction)
2 not in r2c6, it is in r2c4 or r3c4 (Column on 3x3 Block interaction)
2 not in r3c5, it is in r2c4 or r3c4 (Column on 3x3 Block interaction)
5 in r1c6 - Sole Candidate

and from here on, you can try by yourself.

see u,

[coach]

what does
7 not in r2c9, it is in r3c8 or r3c9 mean ?????

[coach]

GOT IT THANKS