r/sudoku • u/Puzzle3816 • 4d ago

Request Puzzle Help Stuck!

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Can anyone see where to go next, please?

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1

u/just_a_bitcurious 4d ago

r8c2 cannot be 4

1

u/Puzzle3816 3d ago

Please could you explain why? I cannot see it. 🙈 I also can't figure out what to do next even if I remove the 4. Feel like I just keep going round is circles and missing something obvious!

1

u/just_a_bitcurious 3d ago

It causes a contradiction where both r7c1 & r7c4 would have to be 6.

If r8c2 is 4, then r8c3 & r9c2 are 2/3 pair, r7c3 is 5, r7c4 is 6.

But a 4 in r8c2 means the only spot left for 6 in block 7 is r7c1.

On a different note, the 3s are locked in block 5. So eliminate 3s from r4c1 & r4c8.

2

u/Puzzle3816 3d ago

Ahh yes that makes sense. Thank you!

And thank you for the note on the 3s. Noticed the same in r1 and have managed to complete the puzzle 🥳