The New Sudoku Players' Forum

[RyanStorm]

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[RyanStorm]

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[JasonLion]

No eliminations are possible in that last photo without information from the rest of the puzzle.

For question 1, the three cells must all share either a row, column, or block.

For question 2, that is a valid elimination and is called a unique rectangle type one.

[RyanStorm]

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[RyanStorm]

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[m_b_metcalf]

I thought more boxes meant harder techniques, but it same stuff.

Quite. The larger puzzles are harder only in the sense that, for any given level of difficulty, there is more work to do and so more room for error. In a similar vein, the French newspaper Le Monde is currently publishing puzzles that it describes as 'extreme' but this is really only because they have just 17 givens. The solutions are relatively eay, it's just a slog.

Regards,

Mike Metcalf