The Double The Chance System by Peter Blake is a detailed and complex system to identify two horses in specific races to be backed in win singles and a reverse forecast.
Dutching Dynamo by Peter Blake is a system that uses dutching for handicap races. There are certain patterns that occur with regularity in handicap races and this system uses these patterns to create selections from the Racing Post.
The Dutching Diamond is a horse racing betting system from a new author/tipster Peter Blake. You get a guide to dutching and three months worth of dutching tips. Anyone can do this as all the information is provided, so in theory little or no work is required.