Connect 4

DUELO Connect 4 uses seven columns and six rows. Players alternate choosing a column. A disc occupies the lowest empty space in that column; you do not choose an arbitrary row or a floating cell.

A full column cannot accept another disc. The server rejects a full-column selection, an out-of-range column or a move from the player whose turn it is not. The lobby has no board-size selector for this game.

Four consecutive discs belonging to the same player win horizontally, vertically or along either diagonal. Longer lines also contain a winning run of four. Opponent discs or empty spaces interrupt a line.

The result is checked after each accepted drop. If all 42 cells are occupied and neither player has connected four, the match is a draw.

Check every playable column for an immediate winning drop for yourself and for your opponent. A visible gap in a diagonal may not be playable yet because the cell beneath it is empty.

After imagining your drop, examine the new space directly above it. Your move may support an opponent's next winning disc. Also look for positions that threaten two different playable winning columns, since blocking one may leave the other open.

The middle columns participate in more possible horizontal and diagonal lines, but position matters more than a rule of thumb. Inspect the actual landing squares and threats before committing.

Before setting up a long combination, scan all seven columns for an immediate win. If no winning drop is available, look for the opponent’s immediate winning drops. A three-disc line matters only if its finishing square is the next available landing square in that column.

A double threat offers two different winning drops on your next turn. It is useful only if the opponent has no immediate winning reply and a single defensive move cannot remove both threats. Imagine the board after each candidate move, including the empty cell immediately above your new disc.

In the example, X can win with a drop in column 4. Playing somewhere else to build a more elaborate pattern would miss the available win. Center control is a useful starting idea, but it never overrides a concrete win or block.

A disc preview helps show a possible column. It does not place a disc or determine the result. The accepted board and turn indicator are the basis for your next move.

Realtime clocks, timeout and forfeit rules apply. Know the stake before entering the queue: losing can cost the entire stake, a completed winning pot has an 8% platform fee and a drawn match returns both stakes without a match fee.