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From Daisuke Sugiura:
This New Number Place has color added to the conventional Number Place.Basic rulesRule1: Numbers Place the numbers 1 to 7 in each row and column. Numbers should not repeat in the same row and column.Rule2: Colors Place five colors (Orange, blue, green, red, violet, gray and pink) in each row and column. Colors should not repeat in the same row and column.Rule3:Combinations Color and number combinations should not be repeated.For example, if you already have a Red 1 you can not place another Red 1 anywhere else.