Sixfold, six small puzzles a day

November 5, 2026

My idea hub holds 229 ideas. On 10 February I added this one:

brain gym. I need it
I need a place with just logic and other types of puzzles from all disciplines (even visual / design would be nice)

The autopilot usually rolls an idea at random. This time Codex was driving. The evening before, it had built Scrollbox, autopilot project number 15. On 4 November at 21:40 I sent:

ok... another one. pick any other new project / app to create from scratch

It read through the hub, took the brain gym on purpose and said so in the notes: A deliberate choice; no random roll or rejection. Sixfold was on my webspace at 22:06, 26 minutes later.

Sixfold home page on a warm off-white background: the heading A little room to think, with think in orange, a card The daily six dated Nov 4 with six coloured tiles and a button Start today's circuit, and below it six practice rooms: In good order (logic), Make 24 (numbers), A little turn (spatial), Over and out (pattern), Between the colours (colour), Dead centre (design) — The front page: today's six, or any one room on its own.

Six rooms

Each room is one kind of puzzle, and each one is generated, not drawn from a list:

Logic room, A place for everyone: four name tiles Ada, Ivo, Luca, Sol in a row, and two clues: Luca sits immediately to the left of Ada. There are two seats between Sol and Ada — **Logic.** Swap four people into the one order that fits every clue.

Numbers room, Make a little 24: three tiles left, 3, 8 and the fraction 8 over 3, with the buttons plus, minus, times, divide and the trail 3 · 8 · (8 ÷ 3) — **Make 24.** Combine two tiles at a time. Fractions count: here 8 ÷ 3 is already one tile.

Spatial room, Give it a little turn: a 3 by 3 reference tile, rotate 180 degrees clockwise, and four candidate tiles A to D — **A little turn.** Rotate the tile in your head; mirror images never appear.

Pattern room, What fills the empty space: a 3 by 3 grid of small 3 by 3 tiles, the last one a question mark, and four options A to D below — **Over & out.** Lay the first two tiles of a row on top of each other; where both are filled, the square disappears.

Colour room, Find the gentle way across: seven blue to teal swatches, START and FINISH fixed at the ends, five shuffled swatches between them — **Between the colours.** Swap the middle five into an even gradient.

Design room, Which one is exactly centred: four rectangular frames A to D, each with a dot, only one dot at the exact centre — **Dead centre.** One dot sits exactly in the middle of its frame. The other three are slightly off.

The checks are strict where it matters. Every logic board is enumerated through all 24 orders and kept only if exactly one of them fits. Make 24 counts in exact fractions, takes any valid route to 24, and draws from all 404 sets of four digits from 1 to 9 that can reach it, out of 495 sets in all. The gradient has to land on seven equal RGB steps.

The same six for everyone

The daily circuit comes from the calendar date, so everyone who opens it on the same day gets the same six puzzles, in any order, and an unfinished arrangement survives a reload. Practice rounds get a fresh seed instead, and a share link carries that seed, so a friend gets the same puzzle with a clean board.

Help comes in two sizes. A nudge is a hint, and a round solved after one is counted as hinted. "Show me the explanation" gives the answer away, and that round goes on the shelf as explained, not solved. The shelf keeps 45 days and the last 300 practice puzzles, and exports a backup file, because it all lives in the browser: no account, no server, no model call. After the first visit it works offline.

The finish screen: an orange asterisk, Six rooms. One little journey. A little room, well spent. November 4, 2026, 6 solved. Six coloured tiles all ticked: Logic, Numbers, Spatial, Pattern, Colour, Design. Buttons Share your circuit and Keep exploring the rooms — The end of a circuit. All the figures here are from Codex's own walkthrough of the live page that evening, so this circuit was solved by its test script.

built: 4 November, 21:40 to 22:10, by Codex; the idea itself from 10 February
puzzles: six kinds, all generated; 404 number sets; one daily circuit per date, unlimited practice
tested: by Codex: 110 browser checks on the local copy and again on the live one, 15 model and storage suites, 600 seeded rounds checked to start unsolved and have an answer
made with: plain HTML, CSS and JavaScript modules, about 49 KB of script, no build step, no dependencies; installs as an app

Play today's sixdesktop or phone The autopilot overviewproject number 16

Still rough

There is no difficulty: a puzzle on day one is as hard as one on day forty, and the shelf only counts. Three of the six rooms (the turn, the pattern, the dot) are one pick out of four, so a guess has a one-in-four chance. "From all disciplines" is six so far, with nothing for words, music or memory. The voice is very gentle: the word "little" is in the source 24 times, and every room tells you to take your time. And the shelf is per browser, so the phone and the laptop each keep their own unless you move a backup file across.