Renju - Rules

Rules

Unlike Gomoku, Renju has a unique sequence of opening moves called an "opening rule".

An example of such opening rule (namely "RIF opening rule") follows.

  1. The first player places 2 black stones and 1 white stone on the board thus forming opening pattern.
  2. The second player now chooses whether to play black or white.
  3. White then places one more stone on the board.
  4. Black places 2 stones on the board.
  5. White removes one of the two black stones from the previous move.
  6. White places a white stone.

After this sequence is complete, Black and White continue to take turns to place their stones.

The Extra General Assembly of Renju International Federation in 2008 created 3 new sets of rules for openings that are to replace the above old sequence of moves: Soosõrv, Taraguchi, and Yamaguchi. Also a rejection system for their use was approved. The General Assembly of Renju International Federation in 2009 certified Sakata opening rule as proposed by Russia. The General Assembly of Renju International Federation in 2011 certified modified opening rules such as Taraguchi-N and Soosõrv-N.

There are certain moves that Black is not allowed to make:

  • Double three – Black cannot place a stone that builds two separate lines with three black stones in unbroken rows (i.e. rows not blocked by white stones).
  • Double four – Black cannot place a stone that builds two separate lines with four black stones in a row.
  • Overline – six or more black stones in a row.

Black can win the game only by placing five black stones in a row (vertically, horizontally or diagonally).

White can win by either:

  • getting five (or more) white stones in a row
  • forcing Black to make a forbidden move (see above).

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