Alternative Rules for Tournament Play, Version 1
The board begins empty.  The game proceeds in 5 steps:

1. The bidding phase: players begin by each bidding numbers that stand for free turns.  Player 1 bids first, by saying a number as low as zero.  His opponent must then either pass, or increase the bid by at least one.  Bidding continues until a player passes.  That player now owns a number of free turns equal to the last bid (however, he does not take these turns yet.  He will in step 4).  
2. The player who did not pass invents a pattern, describes it to his opponent, and then takes as many consecutive turns as he wishes (or none at all).
3. The player who passed in step 1 decides which player is the builder, and which is the blocker.
4. Starting with the builder, the players alternate turns, with one exception: the player who owns the free turns from step 1 may take one free turn after each of any of his normal turns, until he has no free turns left.  He is not required to use all his free turns by game's end.  
5. The game ends either when the board is completely full or the pattern has been built (but never before step 3 is complete).  If the pattern has been built, the builder wins.  Otherwise the blocker wins.  The game may also end when a player resigns.

Alternative Rules for Tournament Play, Version 2
The board begins empty.  The game proceeds in 6 steps:

1. The bidding phase: players begin by each bidding numbers that stand for free turns.  Player 1 bids first, by saying a number as low as zero.  His opponent must then either pass, or increase the bid by at least one.  Bidding continues until a player passes.  That player now owns a number of free turns equal to the last bid (however, he does not take these turns yet.  He will in step 4).  
2. The player who did not pass invents a pattern, describes it to his opponent, and then takes as many consecutive turns as he wishes (or none at all).
3. The player who passed in step 1 decides which player is the builder, and which is the blocker.
4. The player who owns the free moves from step 1 then takes as many of those free turns as he wishes, consecutively.   
5. Starting with the builder, the players alternate turns.
6. The game ends either when the board is completely full or the pattern has been built (but never before step 3 is complete).  If the pattern has been built, the builder wins.  Otherwise the blocker wins.  The game may also end when a player resigns.