Pips October 18, 2025

Hints and answers for October 18, 2025

Stuck? Take it in stages. A nudge costs less than the full answer, and the answer is here if you want it — each diagram below is the verified solution our generator built this board from, using tiles drawn from the standard double-six domino set. On the looser boards other valid arrangements can exist too; any filling that covers every square and satisfies every region counts as solved.

What goes wrong on this one

With 4 of 6 regions only loosely bounded, this board resists arithmetic and rewards elimination. Work out where each tile cannot go before deciding where it should.

With 3 exact sums on the board, there is usually a square that only one tile in your tray can legally fill. Find that square first and the rest tends to cascade.

If you have genuinely stalled, undo back to the last tile you were confident about rather than reshuffling everything. Most dead ends on a board this size trace to one early placement made on a guess, and everything after it inherits the mistake.

Boundaries, not regions

There are 8 distinct region-to-region boundaries on this board, which is a lot for 6 regions. Almost every tile you place is going to land half in one region and half in another, so treating regions as separate sub-puzzles will not work here — think in pairs.

A domino can straddle two regions, and each half only has to satisfy the region it lands in. That is the single most common misreading of the format — people assume a tile must sit inside one region, which makes perfectly solvable boards look impossible. The rules page works through it with examples.

Common questions

Is the October 18, 2025 pips puzzle free to play?

Yes. All three boards for this date are free, with no account and no subscription, and they stay available permanently.

How many dominoes does the October 18, 2025 hard board use?

10 dominoes across 20 squares. Every tile in the tray must be used, and the count is always exactly half the number of squares.

Where do the doubles go on this board?

This tray holds 5 doubles (3-3, 4-4, 1-1, 0-0, 2-2). A double puts the same value on both of its squares, so it cannot sit inside an all-different region and it is the fastest way to overshoot a tight sum. Place them where the arithmetic has slack.

Can I replay this puzzle later?

Yes. Boards are generated deterministically from the date, so this URL always shows this exact puzzle. Your progress saves in your own browser, and Reset clears it whenever you want a fresh attempt.

The difficulty ladder

These are three separate boards, not one board with hints removed, so playing all three on October 18, 2025 gives you three genuine attempts rather than three views of the same solution.

easy

8 squares, 4 dominoes, 4 regions, 4 region boundaries. 50% of its regions carry something other than an exact total, and the widest region spans 3 squares.

medium

14 squares, 7 dominoes, 5 regions, 6 region boundaries. 40% of its regions carry something other than an exact total, and the widest region spans 3 squares.

hard

20 squares, 10 dominoes, 6 regions, 8 region boundaries. 67% of its regions carry something other than an exact total, and the widest region spans 5 squares.

How this board was made

This board was not hand-designed and it was not copied from anywhere. The generator laid down a valid arrangement of 10 dominoes first, then divided the 20 squares into 6 regions and derived each region's rule from the values that had already landed in it. Because the solution existed before the constraints did, this board provably has one.

It was then loosened: rules were swapped for weaker ones, one at a time, keeping each swap only while the number of valid arrangements stayed inside the bound for this difficulty. That is why 4 of the hard board's 6 regions carry something other than an exact total.

Generation is seeded from the date, so October 18, 2025 produces this exact board on every device, permanently. Sharing this link always shows the same puzzle. More on the process in our editorial policy.

The tiles you are dealt

The tray holds 5 doubles (3-3, 4-4, 1-1, 0-0, 2-2), and the board has 2 regions governed by an equality rule. A double can never sit entirely inside an all-different region, so those tiles have to straddle a boundary — which usually pins them down before anything else on the board.

The heaviest tile on the hard board is the 3-6 and the lightest is the 0-0. Those two are worth locating first: the heavy tile can only go where a sum has room, and the light one is often the only thing that fits a tight region.

Pip budget

Your tray carries 55 pips in total, and the exact-sum regions between them demand 23 across 8 squares. That leaves 32 pips to absorb elsewhere. Running that subtraction before you place anything tells you whether the unconstrained squares are going to be a dumping ground or a tight squeeze.

The same check on the medium board: your tray carries 48 pips in total, and the exact-sum regions between them demand 26 across 9 squares. That leaves 22 pips to absorb elsewhere. Running that subtraction before you place anything tells you whether the unconstrained squares are going to be a dumping ground or a tight squeeze.

The three boards in detail