I have loved solving sudoku puzzles for ages but it wasn't until recently that I found out about advanced solving techniques. The hidden pairs and hidden triples have been natural techniques to me.
Here's a puzzle I'm doing right now:
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This is where I'm stuck. I've stared at it for long and knowing what I know won't get me further. I always get to this point where there's a 50-50 chance. I want to keep eliminating.
Which technique would you apply next??
Does this x-wing work to eliminate 4 in r5c2 and r5c3?
