momentum dynamic abstract strategy board game lead swing forth like steel sphere newtonrsquos cradle grab lead hold challengethe mechanic game simulate game marbles player turn drop marble glass stone square x game board second playerrsquo turn second player eitherdrop counter replace playerrsquo drop counter hisor pie rule momentum drop marble transfer orthogonal diagonal direction adjacent contiguous line marble marble end line push away cell drop marble fall board return owning playerswhen player marble leave hand require announce marble point opponent force knock seven marble board opponent lose gamethe player marble board end turn win gamefor beginner perpetual game follow rule apply standard x game round rule optional recommend beginner game last round player turn play stop outcome determine player majority marble board player win game end draw player use spare token track round outside edge board step round game end

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