To get to 20x20 I need to do a 4x4 block that covers Guildford. I can either ride ~40km there over roads I've ridden on loads of times, do a 40km ride and then ride ~40km back. Or I can get a train there (after riding 5km to a suitable station), ride 80km to cover even more tiles, and get a train back (and then ride 5km home).
Also looking at doing some one-way rides to cover more ground. I've ridden up to Cambridge and back from SW London more times than I care to remember, but almost all by the same route. I'd look to do it one-way by different routes (often a wiggly route to make a path two tiles wide) and then get the train back.
To get to 20x20 I need to do a 4x4 block that covers Guildford. I can either ride ~40km there over roads I've ridden on loads of times, do a 40km ride and then ride ~40km back. Or I can get a train there (after riding 5km to a suitable station), ride 80km to cover even more tiles, and get a train back (and then ride 5km home).
Also looking at doing some one-way rides to cover more ground. I've ridden up to Cambridge and back from SW London more times than I care to remember, but almost all by the same route. I'd look to do it one-way by different routes (often a wiggly route to make a path two tiles wide) and then get the train back.