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Lizely

Number Match 10

Clear a six-number board by choosing orthogonally adjacent pairs whose values add exactly to 10.

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How to use

  1. 1.Move with the arrow keys and press Space or Enter to select the first number.
  2. 2.Select an orthogonally adjacent second number; the pair disappears only when the values total 10.
  3. 3.Clear the left vertical pair, top-right horizontal pair, then bottom 2+8 pair to score 300 without a deadlock.

About Number Match 10

Number Match 10 is a small route-choice arithmetic puzzle built around one transparent product rule: select two orthogonally adjacent numbers whose sum is exactly 10, and that pair disappears. Clear all six numbers to win. Diagonal numbers are not adjacent, and the order of removal matters because a legal early pair can strand another matching pair across a diagonal.

This page does not claim a standardized historical ruleset or embed an external dataset. The six-number layout, orthogonal adjacency, fixed score, and no-gravity removal behavior are disclosed Lizely product choices derived from the pipeline's Number Match concept. That makes the full game contract inspectable instead of presenting custom mechanics as an outside standard.

The board has two rows and three columns. The top row is 1, 9, 1. The bottom row is 9, 2, 8. Move the visible cursor with the arrow keys. Press Space or Enter to select the first number, then move to an adjacent number and press again. A valid pair disappears and adds 100 points.

If the second choice is not orthogonally adjacent or does not total 10, no number disappears; the newer square becomes the first selection for the next attempt. Selecting the same square twice cancels that selection. Removed squares cannot be selected, and the board does not collapse or apply gravity. Those simple rules make every remaining adjacency visible.

The winning route starts with the vertical 1 and 9 in the left column, using zero-based cells 0 and 3. Next remove the horizontal 9 and 1 at top cells 1 and 2. Finally remove the bottom 2 and 8 at cells 4 and 5. Three successful pairs clear all six cells and produce a score of 300.

A tempting alternate route proves that the game has a real deadlock rather than an automatic victory. If you first remove the top-left 1 with the top-middle 9, then remove the bottom 2 with the bottom-right 8, the remaining 1 and 9 occupy cells 2 and 3. They add to 10 but touch only diagonally, so no legal pair remains. The browser detects that state immediately and asks you to Restart.

Analysis enumerates every pair of remaining cells, checks Manhattan distance one, and then checks an exact sum of 10. Completion means no cells remain. Deadlock means at least one number remains but the legal-pair list is empty. Invalid removed indices are also rejected by the pure logic layer.

The automated fixture asserts the exact board values, four initially available legal edges, valid 1+9 and 2+8 pairs, diagonal rejection, wrong-sum rejection, removed-cell protection, the three-pair 300-point solution, and the alternate-pair deadlock. The full keyboard simulation proves that a user can actually win rather than merely render a finished board.

The interface is a semantic two-by-three CSS grid with large number buttons. Every square announces its row, column, value, removed state, selection, and keyboard cursor. All colors, surfaces, outlines, warnings, and borders use site variables. There is no canvas, random generator, timer, downloaded asset, audio, account, hardware access, or pointer-only control.

Restart restores all six numbers, clears the selection, returns the cursor to the first square, and resets the score. A completed best score may be kept only in localStorage. Double-press Escape to show the shared simulated spreadsheet boss screen, then repeat the gesture to return. For more short logic breaks, try Mosaic, LITS, Thermometers, or Battleships.

Methodology & sources

The logic keeps a Set of removed indices over the fixed values [1,9,1,9,2,8]. It enumerates remaining cell pairs, requires Manhattan distance one and an exact sum of 10, and removes only a valid selected pair. Completion means zero remaining cells; deadlock means remaining cells exist but the legal-pair list is empty. Each successful removal adds 100 points.

Frequently asked questions

Do diagonal numbers count as adjacent?
No. A legal pair must share a horizontal or vertical edge.
Does the board collapse after a match?
No. Removed cells stay empty, so the original two-by-three positions and adjacencies remain fixed.
Can a legal match cause a deadlock?
Yes. Removing the top-left 1+9 first can leave the final 1 and 9 touching only diagonally.
How is the score calculated?
Each successful adjacent pair is worth 100 points. Clearing all three pairs scores 300.

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