Having released what seems to be the weakest active engine available, I have made some big changes..
-Added 32MB hash (20 bytes per element, replace always, store at depth 2 and above)
-Added futility pruning, killer moves
-Changed move ordering scheme
-Added pawn structure evaluation, support points for pieces, separate endgame and middlegame evaluation functions.
I tested the engine in a 25'+10" Gauntlet vs some of the other weak engines, and results were good, especially the improvements in endgame play.
http://www.limechess.homecall.co.uk/25_10%20Gauntlet.html
Hopefully, I can release it in the next few days. More testing first!
Richard