Past puzzle answers

Every finished 4Stack, with the full answers and a written breakdown of why each stack connects.

Each puzzle below has its own page listing all sixteen cards, the four categories in difficulty order, and notes on what the board was actually doing to you — which card was baited into the wrong group, which category was the real trick, and where the ambiguity was deliberate. The categories are previewed under each entry, so this page spoils by design.

Still playing today's puzzle? Today isn't listed here until it's finished, but you'll find yesterday's answers plus escalating hints for today on the hints page — a nudge first, the category names later, full answers only if you ask. If you'd rather work it out yourself, how to play covers the strategies that stop you burning mistakes early.

Want to play these rather than read them? The archive has every past puzzle without the spoilers, and archive plays don't affect your streak.

58 puzzles, newest first