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Solving Instant Insanity Robert E Levin
A Winning Strategy for SIM E M Rounds and S S
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3-arrows A-square Abel adjacent counters analysis array arrows best strategy calculator cards cells centerness chain circuit Coin Problem coins complete component games component positions conjunctive compound considered corner decimal DeLoach discharging procedure disjunctive compound disks dots end position Euler line example five pegs Four Color Problem four-color theorem graph greatest number Grundy H. S. M. Coxeter Haken hexagon hexboard Kayles Kempe chain least method minimum number Na(M neighbors nim-sum number of counters number of edges number of games number of moves P-position P. M. Grundy paper parent cube parity pile of counters points polygons possible problem proof puzzle question Recreational Math recreational mathematics reducible configurations rings rule second player selective compound SG number SG series shown in Figure solution SOMA cube spike square stack subchains Table total number trivalent graph vertex vertices winning strategy