NYT Pips Strategy: Placing Dominoes With Fewer Dead Ends

The NYT Pips how-to page covers the basics well: read the regions first, tackle one-cell regions, then tight sums, then the dominoes that straddle two regions, crossing each domino off as you go, and saving the loose regions for last. That sequence gets a first game finished, but it stops short of the deductions that actually get you through a hard board without guessing. This guide picks up where that leaves off — what each region rule forces on a domino sitting entirely inside it, how a settled region's numbers carry across its border into the next region, a running check that tells you the moment something has gone wrong, and how to recover from a dead end without tearing the whole board apart. If you haven't played yet, start with NYT Pips itself, or browse the archive for earlier boards to practice on.

What a Domino Wholly Inside One Region Is Forced to Show

When a domino's two halves both land inside the same colored region, the region's own rule decides both numbers before you even look at the rest of the board. Inside an = region, every half has to match every other half, so a domino lying wholly inside it must show the same number on both its halves — there's no other way to satisfy "every half is equal" with just one domino covering the whole space. Inside a ≠ region, the opposite constraint applies: since every half in that region has to differ from every other half, a domino fully inside it must carry two different numbers, so a double can never lie wholly inside it. And when a domino covers the entirety of a two-cell sum region, its two halves have to add up to that region's total on their own, with nothing left over to borrow from a neighboring cell. Checking whether a domino fully occupies a region, rather than just glancing at the numbers on it, is often the fastest way to eliminate candidates before you commit to a placement.

Carrying a Settled Region Across Its Border

An = region is the easiest one to lock down, because knowing a single half tells you every other half in that region instantly. But the real value shows up at the edges. Once an = region is settled, any domino that straddles out of it — one half inside the region, one half outside — carries a known number on its inside half, which means the outside half is now the only unknown left on that domino. That known half doesn't just sit there; it becomes a fact the neighboring region's rule has to accept, whether that neighbor demands a sum, a set of distinct numbers, or a limit. Treat a solved region as a source of facts you can walk outward from, region by region, rather than solving each colored area as an isolated box. On a board with several small regions packed together, following one settled region across its borders like this can cascade through two or three neighbors before you have to make another independent decision.

The Running Check: Bare Cells Against Dominoes Left

Every domino in the set has to go down, and every cell — colored or uncolored — has to end up covered. The count takes care of itself: each domino covers two cells, so the bare cells always number twice the dominoes left in your hand. What can go wrong is their shape. A domino covers two neighboring cells, so look at the bare cells as groups of neighbors: a bare cell with no bare neighbor can never be covered, and neither can a closed-off group with an odd number of cells. If you find either, a domino earlier in the solve is sitting in the wrong place, even if every region rule currently on the board looks satisfied. The how-to page's advice to compare what's left in the set with the cells still bare points the same way; the habit worth building is to run this check after every few placements rather than once at the end.

Finding the Placement Behind a Dead End

A dead end shows up when a region's rule can no longer be met with the dominoes you have left — a sum region that needs a total your remaining pieces can't reach, or a ≠ region where every domino left would repeat a number the region already shows. The instinct is to reset the whole board, but that throws away everything you got right. Instead, work backward from the region that's stuck. Ask which domino would have supplied that region if it were still available, and then find where that domino actually went. Often, it's sitting in a region where its placement wasn't strictly necessary — a loose region, an uncolored stretch, or a spot where a different domino from your set could have worked just as well. Swap the two, recheck the region that used to hold the misplaced domino, and the dead end usually clears without disturbing anything else you'd already settled. This is the same logic behind counting before you place: if a region needs a total your remaining dominoes cannot reach, the mistake is in a domino you put down earlier, and tracing it back is faster than starting over.

Where ≠, <, and > Get Misread

Two misreadings cause most of the boards that look unsolvable when they aren't. The first is treating a ≠ region as if it just meant "different from one particular number" — maybe the first half you happened to place. That's not the rule. A ≠ region asks every half inside it to differ from every other half in that same region, all at once, so as the region grows, each new domino you add has to dodge every number already used, not just the first one. The second misreading is around < and > signs. These don't name a specific total the way a plain number does — they set a limit. A < region's total has to stay below the number shown; a > region's total has to stay above it. Because a limit describes a range rather than a single target, you can't use it to pick out the one exact domino that fits the way you would with a sum region. Instead, use it to rule out: any domino whose halves would push the total past the limit gets eliminated from consideration, and whatever survives that filtering is what you're left choosing from. Misreading either sign makes a perfectly solvable board look like it's missing a piece.

Reading Order Still Matters

Even with these deductions in hand, the reading order from the how-to page still pays off, because it determines which facts you have available when you reach the harder regions. One-cell regions and tight sums resolve fastest and hand you the most certain numbers early, which is exactly the fuel the border-crossing chains described above need to run. Skipping ahead to the loose regions before the tight ones are settled just means redoing work once a straddling domino turns out to conflict with something you decided too early.

Practicing the Deductions on Real Boards

The fastest way to make these deductions automatic is to run them against boards you can check your work on. The Pips archive has earlier puzzles to work through at your own pace, and if a particular board has you stuck longer than expected, the step-by-step hints on the main NYT Pips page will take you as far as you need without spoiling the rest of the board. Puzzles refresh at midnight in your own time zone, so if you want to compare notes on today's board specifically, check the reset times page to see when the next one lands for you.

Carrying the Habits to Other Puzzles

The region-by-region checking habit built here — verify a local rule, then check what it forces on a neighbor, then run a global count — shows up across the NYT and LinkedIn puzzle families in different clothing. If you want more of this kind of structured deduction, the Queens solving guide and the Tango strategy guide both build on similar habits of tracking what's forced versus what's still open, and they're worth a look once a Pips board stops giving you trouble.