Wicketz - The Unofficial Advanced Rules
Wicketz, a wonderful board game that has provided many of us hours of fun, got a lot better way back in 2011 when super fan Nigel Collier produced the Wicketz Advanced Rules.
This rule set took the relatively simple engine of Wicketz (which itself is heavily based on the classic 1930s game, Stumpz), and put it into hyperdrive.
While they can be a little complex, you can also pick and choose which rules you want to implement.
The now out of print Wicketz is of course required to play but you can usually pick up a copy from eBay or Board Game Geek for a reasonable price.