more interesting, much more speculative and aggressive is Patzer 3.61L.
This experimental version we used in Leiden and can play very aggressive with pawns.
Maybe most aggressive with pawn moves from all engines at this time I know.
But around 25 Elo weaker as version 3.80.
I believe we made place 4 in Leiden with that Patzer version, I believe in the year 2001.
I tuned the book for a game vs. Fritz.
Thinking on the face by Frans Morsch after the book moves.
100% right was I do because Fritz plays without book moves to fast with the queen.
We had advantage in the game and a great attack but lost later in middlegame.
And the face by Frans (really a very, very nice guy) is much more friendly after the game.
I like the engine a lot and helps Roland at this time.
It's one of my favorits for self playing.
If you like to download the engine:
http://www.amateurschach.de/download/uc ... -v361l.rar
Patzer have many interesting possibilities in text mode.
Much more as modern engines today.
If you wish a great tournament ...
You have to added to Patzer: Aristarch, ETChess and AnMon
and you will be have fun until end of life.
I am using Patzer as sparing partner vs. Gandalf.
Helps the Gandalf programmer to at this times and found many mistakes in Gandalf with the playing style of Patzer.
A nice time for computer chess.
The programmers and his very interesting own ways they go without all the open sources.