Seasons and leagues
A season is 19 days: day 0 is a day off and days 1 to 18 are match days. You play each club in your group twice, once at home and once away.
Groups have 10 clubs. Tier 1 has one group, tier 2 has two, tier 3 has four, and so on. Computer clubs (marked CPU) fill empty places in the bottom tier.
Win 3 points, draw 1, lose 0. Ties are split by goal difference, then goals scored.
Next: Promotion and relegation