one batter in at a time and he must face every delivery bowled while his innings lasts. Single wicket has rarely been played since limited overs cricket began. Matches tended to have two innings per team like a full first-class one and they could end in a draw. Competitions Cricket is played at both the international and domestic level. There is one major international championship per format, and top-level domestic competitions mirror the three main international formats. There are now a number of T20 leagues, which have spawned a "T20 freelancer" phenomenon. International competitions Most international matches are played as parts of 'tours', when one nation travels to another for a number of weeks or months, and plays a number of matches of various sorts against the host nation. Sometimes a perpetual trophy is awarded to the winner of the Test series, the most famous of which is The Ashes. The ICC also organises competitions that are for several countries at once, including the Cricket World Cup, ICC T20 World Cup and ICC Champions Trophy. A league competition for Test matches played as part of normal tours, the ICC World Test Championship, had been proposed several times, and its first instance began in 2019. A league competition for ODIs, the ICC Cricket World Cup Super League, began in August 2020. The ICC maintains Test rankings, ODI rankings and T20 rankings systems for the countries which play these forms of cricket. Competitions for member nations of the ICC with Associate status include the ICC Intercontinental Cup, for first-class cricket matches, and the World Cricket League for one-day matches, the final matches of which now also serve as the ICC World Cup Qualifier. National competitions First-class First-class cricket in England is played for the most part by the 18 county clubs which contest the County Championship. The concept of a champion county has existed since the 18th century but the official competition was not established until 1890. The most successful club has been Yorkshire, who had won 32 official titles (plus one shared) as of 2019. Australia established its national first-class championship in 1892–93 when the Sheffield Shield was introduced. In Australia, the first-class teams represent the various states. New South Wales has the highest number of titles. The other ICC full members have national championship trophies called the Ahmad Shah Abdali 4-day Tournament (Afghanistan); the National Cricket League (Bangladesh); the Ranji