Duel of Law, by RonHaleEvans and Marty Hale-Evans

For the full rules: http://www.ludism.org/~rwhe/Duel_of_Law_100830a.pdf

• 2-4 players
• Deal 12 cards to each player. Each player chooses 1 group of coloured tokens. Turn over a card from draw pile to form the first card on the tableau.

Add phase

• Players must add 1 or more cards to the tableau to create or extend 1 branch, or create 1 twig. A branch is a vertical or horizontal line of at least 3 cards following a Law. A Twig consists of 2 adjacent cards. Players may not claim and score Twigs. All cards must be placed in a straight line.
• Laws uses features of the RD. Examples are
  • increasing integer
  • red even numbers
  • prime numbers
  • alternating light and dark suits
  • light poker suits
  • spells an english word
  • wrapping or cycling dice suits
  • alternating letters
• Laws should not contain specific cards or suits, "OR" condition. By default, branches wraps or cycles (after maxing out the sequence). Jokers are wild cards, except for the poker suit colour and dice suit.

Claim phase

• A player may explain a new Law or narrow an existing Law by 1 level (branch is owned by someone else), claim the branch as his own and place his token on top of others (if any). Branches are claimed by placing the players coloured tokens at the first card of the sequence, away from the direction which the branch extends.

Draw phase

• When anyone runs out of cards, from then on, anyone who has 2 or more branches than everyone else at end of someone's turn wins the game. If nobody wins, draw a card. No hand limit.

-- Changcai