The key strategy to Region Sum Lines involves lines that are a single cell in one region but three cells in another region. Three and one at the same time. So here’s a puzzle with nine such lines!

Plenty of blue Region Sum Lines all around, plus one of each digit. In case you need a reminder of the digits one through nine!

Given digits can be friends! Who needs lines or dots or cages when you have great big digits? Well, great big digits and a global constraint.

Sometimes a puzzle is less about what goes where, and more about what doesn’t go there.

The rain is gone! I can see all obstacles in my way. Gone are the dark clouds that had me blind. It’s going to be a bright, bright Sudoku day.

The azul sky out the windows puts on in the mind of a beach in Mexico. How many windows? Uno, dos, tres, quatro!

What time is it? Four-thirty. It's not late, no. No! It's early, early.

It’s a computer chip. Or a mockup of a computer chip. Transistors, traces, and so on.

The coloring is cosmetic. More or less.

Some people seem fixated on Inuit people having many words for snow, but English does too! From blizzard to whiteout, with flurries, graupel, and drifts, we have so many words. The one this puzzle’s palindrome lines make me think of is sleet.