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"It Considered Every Possibility"

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State

No champion-beating machine came close to considering everything — each searched selectively and trusted a judge at the frontier.

Show

Two hundred million positions per second is a rounding error against chess's tree, never mind Go's ten-to-the-170.

Watch for

The machines did not out-think every line; they out-disciplined human selectivity — and their play is exactly as sound as their judge.