trick. Most of these variants are described in a book titled Rook in a Book published by Winning Moves, and in the official rules that come with Parker Bros editions of Rook. The two official variants of four-player partnership Rook described by the game publishers are Kentucky Discard Rook (Tournament Rules), and Regular Partnership Rook: Kentucky Discard Rook (Tournament Rules) is the most popular form of the game, and the rules have been described above. Officially recognized variants of Kentucky Discard Rook (Tournament Rules) include Kentucky Discard Original Rules (eliminates the Rook Bird card), The Red 1 (adds the red 1 card as a higher 30 point trump), and Buckeye (adds 1s as 15 point counters that are the highest cards in each suit). Regular Partnership Rook is played with all cards 1-14, but without the Rook Bird or a nest, and 20 points is given to the partnership that wins the majority of tricks. Officially recognized variants of Regular Partnership Rook include Dixie (which uses a nest and uses the 13 as a 10-point counter instead of the 14), Display, and Boston (both of which involve the declarer playing the partner's hand as a dummy, similar to Bridge). Rook in a Book describes other common variants, including 1-High Partnership. This game is very similar to the version of the game for regular playing cards as it appears in Hoyle's Rules of Games and many internet sources. It is played with all cards 1-14, adding the 1s as 15 point counters that are the highest cards in each suit. The Rook Bird functions as the lowest trump and is worth 20 points, and an additional 20 points is given to the partnership that wins the majority of tricks. Trump calling variants Low Card Low card can be called when the bid is taken, in this scenario the Rook Bird becomes the 10.5 of trump, fives are the best, and ones are the worst with quality of card descending as the number gets higher. It can be called low card with any color being trump. No Trump No trump hands can be called, when this is done, the Rook Bird becomes the 10.5 of Red, and there is no trump, all cards play as if they were off suit. This can be called in conjuncture with high card or low card. Circus Rook Circus Rook is a variant where when the