Undefeatable Gomoku

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Challenge a computer opponent on a focused 15 by 15 Gomoku board with four selectable difficulty levels.

Undefeatable Gomoku is a compact browser game for playing five in a row against a computer opponent. The entire experience is arranged around a 15 by 15 board, with controls above it for choosing whether the player or computer moves first and selecting casual, challenging, hardcore, or nightmare difficulty. A status panel identifies the active color and current turn. Clicking an empty intersection places a numbered stone, after which the computer responds on the same board. Undo and restart controls support correction, experimentation, and repeated matches without requiring an account or a separate setup screen.

Highlights

Four AI Levels

Casual to nightmare

Flexible Opening

Choose who moves first

Clear Board State

Turns and moves are marked

Quick Recovery

Undo or restart anytime

How to Use

Choose the opening side
Use the first pair of controls above the board to decide whether you want to move first or let the computer open. The board updates to reflect that choice, and the status line identifies which color you control and whose turn is active.
Set the difficulty
Select one of the four difficulty options, ranging from a casual setting to the nightmare level. The selected option controls the computer opponent while keeping the same board and click-based rules.
Place stones on the board
Click an empty cell on the 15 by 15 grid to place your stone. The move receives a number, the computer places its response, and the turn indicator changes so you can follow the current match state.
Revise or restart the match
Use the undo control to take back the latest exchange when you want to test another line. Select restart to clear the position and begin a fresh match with the current setup controls available above the board.