PB Post 2015 Level 5

2015 Level 5

MY criteria for level 5 puzzles is that they require noticing two pairs or two doubles (but NOT chains nor coloring).

Therefore, in solving, I attempt to exhaust all naked singles, hidden singles, single-line eliminations, and double-line eliminations.
Sometimes, I will repeat the puzzle when it is partially done at this point.

DLE - Double-line elimination
SLE - Single-line elimination
Dbl - double (only 2 options)
Pr - hidden pair
Col - coloring
Ch - Chain
Gp - Group

Rw - row
Cn - Column

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PB Post 2015 05 16 Lvl   6   5

 I with 42 remaining, I found good example of 2x2: In rows 5 and 9, only two 1's appear in the same column, thus eliminating other 1s in those columns. NOT SURE if that was necessary.
Also... nice puzzle in that... after finding a single answer (9), I had to resort to single and double line eliminations before finding more.

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PB Post 2015 05 09 Lvl  6   5

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PB Post 2015 05 08 Lvl 5

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PB Post 2015 05 02 Lvl 6   5

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PB Post 2015 04 11 Lvl 6  5

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PB Post 2015 04 05 Lvl 5

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PB Post 2015 03 22 Lvl 6 5

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PB Post 2015 03 13 Lvl 5

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PB Post 2015 02 27 Lvl 5

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PB Post 2015 02 15 Lvl 5

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PB Post 2015 02 06 Lvl  6  5

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PB Post 2015 01 23  Lvl  5

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PB Post 2015 01 04 Lvl  6  5

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PB Post 2015 06 20  Lvl 6 (5)