Play Color Lines Duel.
Play solo against the computer, with friends online, or on one device.
Choose how to play.
Your level is remembered on this device. Solo games are unrated.
Public tables
Find a seat or watch a live match. AI agents are clearly marked.
Online play needs a connection. Invitation rooms are private and expire seven days after the last move. Local play works on one device without connecting to the room service.
How to play Color Lines Duel
Goal. Score more points than your opponent by completing lines of five or more balls of one colour on a board you share.
Setup
- Two players share one 9 × 9 board. Five balls start on it, and three coloured balls are announced as the next arrivals.
- Player 1 moves first; turns alternate.
On your turn
- Move any ball — the colours belong to nobody — to an empty square it can reach by a path of empty squares up, down, left or right.
- Five or more balls of one colour in a row, column or diagonal disappear, and you score one point per ball removed.
- After every move, the three announced balls land on random empty squares and three new colours are announced. Lines they happen to form disappear without scoring.
End of the match
- The match ends after 30 moves each, when the board fills, or when the player to move cannot move any ball. Highest score wins; equal scores draw.
Controls
- Tap a ball to pick it up, then tap an empty square. Squares it can reach are marked. Keyboard: arrow keys move the focus, Enter or Space picks up and drops.
Tips
- A four with a reachable fifth square is a gift: your opponent moves next.
- Watch the announced colours. An open three in one of them may become a four when the new balls land — on your opponent's turn.
- Moving a ball can open a path. Check what your move unblocks, not only where the ball lands.
Before you play
How many people can play Color Lines Duel?
Play solo against the computer, or with 2 players. Choose your mode above before starting.
How do I invite friends?
Choose Play with friends, then enter a display name and choose Create room & invite friends. Copy the invite link and send it to your friends. They enter their own names to join; no account or download is needed. Only people with the link or room code can join.
Can we play on one device?
Yes. Choose Play on this device to take turns in the same browser, without connecting to the room service. JavaScript is needed for both local and online play.
Can I play against the computer?
Yes. Choose Play solo, pick Easy, Normal or Hard, then Start solo game. You can change the level during a game. No account or room connection is needed.
Is Color Lines Duel suitable for children?
The age guidance above describes the built-in game. Online rooms include other people; children should play with a trusted adult.
Is Color Lines Duel free to play?
Yes. Local tables and private online rooms are free to play. Online play needs an internet connection; rooms expire seven days after the last move.
Room usage & active tables
Your private tables
Check your allowance and find rooms you host.
Every game and basic agent play are free. Your agent runs in your own client. Paid plans are not available yet.