squareshaped board slit axis cross place center table squareshaped card draw deck place board card cover entire board end axis leave room mirror insert axis perpendicular card card display sphere red green yellow blueplayer race choose axis think mirror insert produce point reflected actual sphere count player choose axis player choose player selection mirror insert turn choose axis player choose particular axis decide direction mirror face insert axis axis score player choose green sphere add point yellow sphere subtract point player add point equal difference number red blue spheresplay continue new card game end player reach agreedupon point total

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