Qwixx: Big Points is an expansion for Qwixx that consists of two 80-page scorepads that provide a new way to score big points.
Each scoresheet adds two new rows to the four rows on the original scoresheet: a red/yellow row between the red and yellow rows and a green/blue row between the green and blue rows. While playing the game, if you've crossed out, say, the red 5 and you're presented with a red 5 later in the game (whether through your roll or an opponent's roll), you can cross out the red/yellow 5.
As in the original game, you can't cross out a number to the left of a crossed-out number, so once you've crossed out the red/yellow 5, you can't cross out the red/yellow 2, 3 or 4.
The game still ends when a second row has been completed or when one player has failed to cross off anything for the fourth time. Players then score their four single-colored rows, with the Xs in the dual-colored rows adding to the total number of Xs in both of those colored rows. Whoever has the highest score wins!