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shape

The pattern and relationships formed by stones, judged for strength, efficiency, flexibility, and weakness.

Also known as

Katachi

Shape is the pattern or configuration formed by stones and their relationships on the board. It is assessed through qualities such as connection, liberties, eye potential, flexibility, and efficiency. Common formations include both strong and defective shapes.

Evaluating shape helps a player judge the strategic quality of a formation and decide whether to strengthen it, attack it, connect stones, or exploit a weakness. Shape is a broad concept covering stone configurations; named formations such as empty triangles and tiger shapes are specific examples of shape.

A shape is not automatically good or bad in isolation. Its value depends on the surrounding position, the results of tactical reading, and the strategic objectives of the game.