Take the centre, then mirror every move through it, and you place the last coin. The proof has three requirements and only one of them needs that opening move, which is the step a one-line answer skips. Central symmetry alone is not the condition: an annulus is centrally symmetric and the first player loses on it.

Tendances

A Ten Dollar Swing Prices a Four Dollar CallProbability & Statistics10 min

Sine Is Bounded on a Line, and a Line Is Almost None of the PlaneAnalysis / Calculus10 min

A Linear Term in the Exponent Moves the Bell and Does Nothing ElseAnalysis / Calculus10 min

Récents

A Damped Spiral That Rings Down to One, Not to ZeroExplainer9 min

Both Term Tests Return One, and the Sum Still Stops Below TwoDeep dive10 min

A Whole Line That Lifts Is a Missing Axis, Not a DiscountDeep dive11 min

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