It's a 3×3 grid, typically with team names making up the x and y-axis. So, at the intersection you have to pick a player who has played for both clubs. If it's the Mets and Yankees, you could pick Dwight Gooden or David Cone or Yogi Berra.
After the game is completed, it gives you an overall rarity score. My goal is to be under 50. Ten times my rarity score has been in single digits, with a personal best of three. If you miss a player, your rarity score will be in triple digits.
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