I found a link to this today on the World Croquet Federation website.
Created by Brian Wainman this online tool will work out how many bisques you should have in AC handicap, how many extra strokes in GC handicap and the winner and loser points impact when playing AC advanced games
Simply enter the type of croquet being played, the game type, your handicap and your opponents. Press Calculate and all is revealed. A very handy tool.
You selected: GC 7 Point on a Full Lawn playing Level Play Singles – Match. Your handicap is -3 and your opponent’s is 1 . Your index change: Win (+2) Lose (-18)