No, an accidental double click on Check does not end Color by Number. The checker hashes the full 36-digit board signature and only counts a mistake when that signature differs from the one it last recorded, so re-clicking Check on an unchanged wrong board is a safe no-op that does not consume the second strike. A run only deadlocks when the player paints a second, distinct wrong full arrangement and verifies it on a changed grid. The same protection extends to the keyboard, because repeated Enter keydowns are deliberately ignored, so a held Enter key cannot race across cells or issue accidental checks. The two-strike rule that ends play still requires two separate, intentional wrong submissions, not a single one triggered by accident. Color by Number awards exactly 1,000 points for the single correct 6 by 6 rocket regardless of how the check was triggered, and any terminal moment only comes after you actually change the board, paint a new wrong full arrangement, and submit it through Check picture or Enter.
How the Check Picture Rule Handles an Accidental Double Click
The Check picture button (or the Enter key) does not simply count "number of clicks" the way a stopwatch counts taps. Instead, the runner treats every fully painted board as a 36-digit signature and remembers only the most recent counted wrong signature. The first time you submit a fully painted wrong board, that signature is stored as the last counted wrong arrangement. Submitting Check again on the exact same board produces the exact same 36-digit signature, so the runner recognizes the repetition and does not add a second mistake. Deadlock requires a second signature that is genuinely different from the first, which only happens after at least one cell changes.
This means that accidental double clicks, accidental Enter presses, or even rapid keyboard auto-repeat on the same unchanged board cannot end your run on their own. To end the game, you would have to deliberately edit a cell, leave at least one cell wrong, and submit a fully painted board whose signature differs from the one you already counted. The two-strike contract still holds, but it is enforced on distinct wrong arrangements, not on button presses.
When the run is deadlocked, or when you complete the board, all painting, clearing, palette selection, cursor movement, and additional checks freeze. Restart is the intentional exit and resets a fresh blank 6 by 6 grid with group 1 selected, zero mistakes, and zero score. If you want to keep playing the same rocket after a clean Restart, the fixture always restores the same disclosed 36-digit clue grid: 111311, 113331, 113431, 123332, 123332, and 221122, which read together as 111311113331113431123332123332221122.
How to Paint the 6 by 6 Rocket Safely
- Read each clue and match it to the numbered palette: 1 Background, 2 Flame, 3 Hull, or 4 Window. Each clue is a digit between 1 and 4, and the palette buttons repeat both the number and the semantic name.
- Choose a palette button by clicking or tapping it, or press the number key 1, 2, 3, or 4 directly. The selected brush shows in the status line and is outlined on its palette button.
- Click or tap cells to apply the current brush. You can also move the cursor with the arrow keys, which clamp at the edges of the 6 by 6 grid, then press 1 through 4 to paint the selected cell. Press Space to repeat the current brush.
- Use Delete or Backspace, or right-click, to clear a cell you painted by mistake. Painting a cell again replaces its earlier group, so a wrong choice is always repairable before you submit Check picture.
- Paint every one of the 36 cells. An unpainted cell counts as a 0 in the signature, so an incomplete board simply returns an incomplete message with no mistake added, and you can keep filling.
- Press Check picture, or press Enter, to verify the board. The checker compares every cell against the independent 36-digit oracle and reports one of three outcomes.
- If you see the incomplete message, keep painting. If you see a completed wrong attempt, ignore it and keep editing. Only a second distinct wrong arrangement deadlocks the run, and only the exact correct board awards 1,000 points.
The Three Outcomes of Pressing Check
The three outcomes all share the same input (a press of Check picture or Enter), but they trigger different effects. The first fires any time at least one cell remains unpainted. The second fires on a fully painted board whose 36-digit signature differs from the independent oracle, including the path an accidental double click takes; the first distinct wrong arrangement records one mistake and stays editable, while only a second distinct wrong arrangement deadlocks the run. The third fires only when every cell matches the independent 36-digit oracle exactly.
| Outcome | When It Fires | Effect on the Run |
|---|---|---|
| Incomplete | At least one cell is unpainted (a 0 appears in the signature) | No mistake added; board remains editable; continue painting |
| Completed wrong attempt | All 36 cells are painted but at least one group differs from its clue (signature does not match the independent oracle) | The first distinct wrong arrangement records one mistake and remains editable; rechecking the same unchanged wrong board adds no mistake; a second distinct wrong arrangement deadlocks the run |
| A fully painted wrong board whose signature differs from the previously counted wrong board | One mistake recorded on the first occurrence; a second distinct wrong signature deadlocks the run | |
| Completed correct | All 36 cells are painted and every cell matches the independent oracle | Run ends with exactly 1,000 points; further input is frozen until Restart |
The oracle's group counts also confirm the fixture's integrity. The disclosed board carries 15 Background cells (group 1), 8 Flame cells (group 2), 12 Hull cells (group 3), and 1 Window cell (group 4), and 15 + 8 + 12 + 1 = 36, matching the 6 by 6 grid exactly. No unknown or out-of-range value appears in the answer, and every palette group is necessary: the test suite replaces each complete group in turn and proves that none of those near-answer boards can pass.
Reading the Palette Buttons and Group Letters
The checker does not depend on color recognition, and the palette buttons are designed so that text alone can solve the board. Every cell keeps its clue number visible after painting, and a small letter identifies the intended group: B for Background, F for Flame, H for Hull, and W for Window. The palette controls repeat both the numeric ID and the semantic name, and the screen-reader labels announce the row, column, clue, semantic group, and current painted number for every cell.
This redundancy matters for the double-click question because it removes the need to interpret rendered tones. If you happen to confuse two palette colors, the clue digits, group letters, and status-line brush all still tell you which group belongs in each cell, so the only way to submit a wrong board is to actually paint the wrong group into a cell. That is also why an accidental double click on Check cannot sneak a strike past you: the signature only changes when a cell's content changes, and a click on Check without any cell edits leaves the signature identical.
You can also rely on the board identity alone. The fixed six-by-six rocket has six rows that read 111311, 113331, 113431, 123332, 123332, and 221122 in row-major order, so every clue's correct answer is determined by its position. The single Window cell sits at one fixed row-major position, the Hull cells occupy twelve fixed positions, the Flame cells occupy eight, and the Background cells occupy the remaining fifteen.
How Keyboard Repeat Behavior Stops Accidental Submissions
The keyboard path through Color by Number is engineered with the same anti-accident logic as the pointer path. Arrow keys clamp the cursor inside the 6 by 6 grid, so a long press cannot escape the board. Pressing 1, 2, 3, or 4 paints the selected cell and also selects that group as the new brush, while Space repeats the current brush. Delete, Backspace, and right-click clear the selected cell. Enter submits Check picture.
The crucial protection against accidental checks lives in the keydown filter. Repeated keydown events for the same key are deliberately ignored while a key is held, so auto-repeat cannot fire several Enter checks in a row, and a held Enter key cannot submit the board multiple times before you release it. Combined with the signature-based counting rule, this means that even a player who rests a hand on the keyboard cannot rack up extra mistakes through accidental inputs. The two-strike rule that ends the run still applies, but both strikes have to come from genuinely different wrong paintings.
For complete peace of mind, every replay of the rocket starts from the same disclosed blank clue grid, and the boss key, restart button, and best score all live on the shared game shell. Pressing Escape twice inside the shell timing window brings up the spreadsheet-style cover, and pressing it twice again returns to the game. Nothing in the painting flow, the check flow, or the deadlock flow can be triggered by accident, so the only intentional exits are the Restart button and a correctly solved board worth 1,000 points.
For a deeper look, see Color Gradient Puzzle: Play Without Dragging Using Keys.