Remember that you can solve the puzzles from the League online on the Sudokucup Guest League page with a 24h delay.
Rules – Rules for Sudoku. Additionally,
1. An arrow pointing towards the grid denotes that the first 3 digits from that edge are an increasing sequence.
2. An arrow pointing away from the grid denotes that the first 3 digits from that edge are a decreasing sequence.
3.If there is no arrow at the edge, the first 3 digits from that edge can neither be increasing nor decreasing (e.g. 2-4-3)