But even when it transposes back to a mainline Hanham they still call the lion. That move order does cut down on theory needed for non e5 players. Saves having to learn to defend against Kings gambit, Bishops opening etc
Found the website, http://www.vanrekom.nl/thelion/indexgb.htm. They certainly enthusiastic about it.
Have the book the Philidor files, it includes all that stuff but never calls it the lion, it just the Philidor via another move order
Played the Philidor today and according to explorer I was in the the Lions cave, whats that all about? Someone needs to tell chess.com Lions don't live in caves