The New Sudoku Players' Forum

[bennys]

Not really
when I am looking at R6C2 and R7C2 I know that 3,6 is impossible, the 4,6 I removed immediately and looked for the 1,9 which is not that tough.

Regarding rubylips argument the other candidates are not relevant here
he is saying r5c1=4 =>r5c1<>8 => r4c1=8 => r6c2=3 => r8c2=6 => r8c1=4
and that a contradiction so r5c1<>4

[emm]

bennys and rubylips thanks for your patient replies -

The chain is perfectly clear - I had a problem understanding the original notation.

bennys - how does this combination {39} {29} {289} {689} lead to

Code: Select all

R5C2 cant be 3 because of C (the only 3 in C is in R5)

?

[bennys]

If you have locked set (its locked because the 6 is removed)and a candidate appear only in one square it force to get that value.(R5C7=3)

[emm]

Of course, r6c2=6. Thanks.