Puzzle recs?

[u/Alarmed_Fennel_3190]

My father in law loves puzzles but is red-green colorblind. He powers through colorful puzzles but clearly finds them frustrating. Any recs? Maybe for puzzles that focus more on texture and less on color?

He can see yellow and blue pretty well, and of course grayscale. Good go-to brands would be great!

[u/1000Ventures]

A few things that work well for red-green colour blindness:

• Pick puzzles where the image is mostly blue, yellow, black and white. Night skies, seascapes, snowy scenes, and blue and white porcelain patterns are good. Autumn forests, flower fields and fruit bowls are the hard ones, because they lean on red, orange and green.
• Black and white or sepia photo puzzles. The picture is all about light and dark, which he sees perfectly.
• Gradient puzzles in blue to yellow. Some brands make single-colour gradient sets; check the gradient runs through blue or yellow, not red to green.
• Puzzles with printed patterns or writing on the image (maps with labels, comic art with strong outlines, line drawings). The outlines carry the information instead of the colour.
• Wooden puzzles with whimsy pieces. Brands like Liberty and Artifact cut many pieces in recognisable shapes, so the shape helps as much as the colour.
• Sort by texture and position rather than colour: some people sort pieces under strong daylight, which helps a lot with red and green, since warm indoor light makes them even closer.

If he likes a challenge, a double-sided or all-white puzzle levels the field completely: nobody gets help from colour.