ISO Challenge page help: Odds Portal lists all upcoming ISO Challenge darts matches played in Australia. "B's" column indicates number of bookmakers offering ISO Challenge betting odds on a specific darts match. Columns 1, X and 2 serve for average/biggest ISO Challenge betting odds offered on home team to win, draw and away team to win the ISO Challenge match. The top line of upcoming matches table (Darts - Australia - ISO Challenge) lets you click-through to higher categories of Odds Portal betting odds comparison service.