Number Chain is played on a seven-column grid. Each turn gives you a
numbered ball or a wildcard eraser. Choose a column, drop the current
piece, and try to keep the board open while forming valuable lines.
Basic Rules
Drop the current number. Click a column or use the
keyboard to place the current piece. It lands in the lowest empty cell.
Clear four or more. A line clears when it contains
four or more matching numbers, or four or more consecutive numbers.
Use any direction. Horizontal, vertical, and diagonal
lines all count.
Chain the falls. When cleared cells disappear, pieces
above them drop. New lines formed by that fall become combo clears.
Keep space at the top. The game ends when the board
fills and no playable drop remains.
Scoring
Longer lines are worth more than shorter lines, and combo clears are
multiplied. This means the highest scores often come from setting up a
board where one clear makes another clear happen automatically.
Modes
Easy: shows five upcoming pieces and gives erasers more often.
Normal: shows three upcoming pieces and is the default mode.
Hard: shows one upcoming piece and rewards flexible planning.
Strategy Tips
Use the center columns for numbers that can support multiple diagonal lines.
Keep edge columns lower when possible so they do not become dead ends.
Look for numbers that work in both a same-number group and a consecutive run.
Save wildcard erasers for pieces that block several future moves.
When choosing between two clears, prefer the one that improves the board after gravity.