Boardgamegeek https://boardgamegeek.com/boardgameexpansion/320877/qwixx-bonus
English - On one of the scorepads, the score sheet now includes twelve boxed spaces, with three boxes in each of the colored rows. Additionally, a row of twelve colored boxes lies below the colored rows. Whenever you cross off a boxed space, you cross off the next colored box in the row (e.g., a red box), then cross off the leftmost space of that color that you can legally mark off. This might cause a chain...
Official https://www.gigamic.com/jeu/qwixx-bonus-bloc
French - Le bloc propose 2 nouvelles variantes pour Qwixx.