Guzumi
A seemingly inefficient move that works because the position gives it a concrete tactical value.
Guzumi is a move that creates an ugly or empty-triangle-like shape, yet is tactically or practically effective in the specific position. It accepts the apparent inefficiency of an empty triangle or a similar shape to achieve a concrete local purpose—such as gaining liberties, making a connection, or applying pressure.
The key point is context. An ordinary empty triangle or bad shape is usually criticized for wasting efficiency, while guzumi is judged favorably because the surrounding position makes that shape useful. The term does not make every empty triangle good: its value depends on the concrete tactical circumstances.
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