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Moving Three Pieces Better Than Two or One?

Logic Level 2

It's White's turn. Assume Black plays optimally. What is the minimum number of moves to checkmate the black king?

3 4 5 None of the rest

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Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

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including olympiad champions, researchers, and professionals.

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by Michael Huang

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