How to play SUMMIT
The daily number puzzle
SUMMIT is a daily number puzzle: you're handed a small set of number tiles and one target, and you combine the tiles with arithmetic until you build that target exactly. It's part mental math, part route-finding — like a pocket-sized Countdown numbers round you can solve in a minute, the same puzzle for everyone in the world each day.
Play SUMMIT →The goal
Every day SUMMIT deals you a handful of number tiles and a single target. Your job is to merge tiles together, two at a time, until one of the tiles on the board equals that target. The target is always produced by a real chain of legal moves on the starting tiles, so every daily puzzle is guaranteed solvable — there is always at least one path up the mountain. Finding it quickly, with as few operations as you can, is the whole game.
How to play
The core move is simple: tap a tile, tap an operator, then tap a second tile. The two tiles you chose disappear and merge into a single new tile showing the result, which you can then combine again. You keep merging until a tile lands on the target.
- Operators: you can use +, −, × and ÷ on any two tiles currently on the board.
- Integers only, no negatives. Subtraction needs the first number to be greater than or equal to the second, and division must come out exactly with no remainder. Order matters for subtraction and division, and illegal moves are politely refused rather than punished.
- Undo and Reset. ↶ Undo steps back one move, and ↺ Reset restores the original starting tiles. There's no penalty for experimenting, so probe freely.
- Hint. Stuck? A Hint reads your current board and suggests one legal next move that still leaves the target reachable — it never sends you down a dead end.
- Desktop keyboard: press 1–9 to pick tiles, + - * / to pick the operator, U to undo, R to reset, and Esc to clear your current selection.
A worked example
Suppose your target is 20 and your tiles are 4, 5 and 3. The fastest route is to spot that 4 × 5 = 20 — one operation and you're done, with the 3 left over and never needed. You don't have to use every tile; you only have to make the target. Of course not every puzzle is that kind: if the target were 23 instead, you might take 4 × 5 = 20 and then 20 + 3 = 23, using all three tiles in a two-step chain. Reading the target first and asking "what nearby number can I build, then nudge?" is the whole rhythm of SUMMIT.
Strategy tips
- Work backwards from the target. Ask what two numbers could combine into it — a product, a sum, a difference — and then work out how to build those pieces from your tiles.
- Factor the target. If the target factors cleanly (say 48 = 6 × 8 or 72 = 8 × 9), hunt for tiles that can make those factors; multiplication closes large gaps fast.
- Keep big numbers for ×. Save your largest tiles for multiplication where they do the most work, and use small tiles to fine-tune with + and − at the end.
- Use division to shrink, not just to divide. An exact division can turn an awkward large number into a tidy factor you actually need — but remember it has to come out whole.
- Branch fearlessly with Undo. Because Undo and Reset cost nothing, try a promising merge, see where it leads, and step back if it stalls. Treat the board as a scratchpad, not a commitment.
Daily puzzle, streaks & sharing
The daily puzzle is generated deterministically from the date, so everyone in the world plays the identical board and can compare. Solving keeps your streak alive, earns currency for the shop, and is timed — solve fast to climb the global leaderboard, which ranks by time with your operation count as a tiebreaker. When you win, you can share a spoiler-free result: it shows how quickly you reached the summit without ever revealing the steps, so friends can race the same board fresh. A Practice mode is on hand too for when you can't wait for tomorrow.
Accessibility
SUMMIT plays fully by keyboard on desktop, supports reduced-motion and sound toggles, and runs free with no account required. It's installable as an app and plays offline, so the daily climb is always one tap away.
Do I have to use every tile?
No. You only need to make one tile equal the target — leftover tiles are fine. Sometimes the shortest solution ignores tiles entirely.
Are negative numbers or fractions allowed?
No. SUMMIT stays in whole numbers: subtraction only works when the first number is at least the second, and division must come out exactly with no remainder.
Is every daily puzzle solvable?
Yes. Each target is built from a real chain of legal moves on the starting tiles, so a valid path always exists — and the Hint will always point to one.
What does the Hint do?
It looks at your current board and suggests one legal next move that keeps the target reachable, so you get nudged forward without being handed the whole answer.