Prof. Richard Lorentz

Jena, April 2011

Prof. Richard Lorentz (California State University) is the father of strong computer bots for two rather different games:

Invader for the game of Amazons.
Wanderer for the game of Havannah.

Invader won several medals in the Computer Olympiads for Amazons: Bronze in 2001, 2002, Silver in 2003, 2005, Gold in 2008, 2009, 2010.

Wanderer got the Havannah Silver medal in the Computer Olympiad 2010, and Gold in the inofficial competition of 2009.

Both bots, Invader and Wanderer, contain Monte-Carlo elements. Wanderer is active on, Invader played a few games on Little Golem, with a 100 % score.

In April 2011, Richard Lorentz (California State University at Northridge) took three weeks of his sabbatical to stay with my group at Jena University. Here are a few pictorial impressions, from his Amazons talk in the seminar.

Rules of Amazons I: Forward goes the arrow!
Observe the unique 7x6 Amazons board on the green board.

Rules of Amazons II: Finally it comes down somewhere.

The audience: following the arrow (to the right: Prof. Johannes Waldmann from Leipzig)

Details from inside of Invader

Aftermath in my chamber: Richard and Johannes Waldmann (Havannah programmer, too: Ring-von-Fehler-Bot) discussing Monte Carlo issues.

Dreaming of a wonderful Amazon

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