Summit

Summit stacks numbers into a pyramid and asks only one thing: that each disk equals the sum of the two that support it. You don’t enter any numbers, they’re all already on the board. You only swap their places. The pyramid has five rows, fifteen disks, a locked top shown in green, and a mix of positive and negative values that rules out reasoning like “values must necessarily increase.” A MOVES counter is shown at the top: the game is also played with an economy of gestures.

1. Locate the top disk, locked and colored differently: it’s the only disk you won’t be able to move.
2. Swap numbers two by two to reorganize the rows.
3. Check the constraint everywhere: each disk must equal the sum of the two disks placed just below it.
4. Keep an eye on the MOVES counter. The game is measured by the number of swaps used.

Because the constraint is unique and fits in a single sentence, yet it propagates through the whole pyramid: moving a disk at the bottom calls everything above it into question. With negative numbers in the mix and a swap counter in view, Summit rewards those who calculate before they touch.

No attempt counter or displayed limit: the permanent indicator is MOVES, at zero on load. The locked top is distinguished by its color from the rest of the movable disks. Below the pyramid are only two buttons, “Hint” and “I'm done”; the header adds a statistics icon and a “?”.

Core play

The published page shows a single default puzzle: a pyramid with a locked top (distinctly colored), movable numbered disks, a visible MOVES counter, and only the ‘Hint’ and ‘I’m done’ buttons. No mode selector, alternate puzzles, or separate game variants are shown, so play consists solely of rearranging the given pyramid under the stated sum constraint.

• The top is locked: start from it and work downward, it’s the only fixed point of the pyramid.
• Negative values change everything: a row can perfectly well total less than its components, so don’t reflexively try to put the large numbers at the bottom.
• Each swap is counted. It’s better to mentally verify a pair of rows before moving than to correct by feel.