Yavalath is an abstract game for 2 or 3 players that was designed by a computer program called LUDI (invented by Cameron Browne) in 2007. The goal of the game is to place four stones in a row without first making three in a row. 'LUDI' is the winner of the Gold Medal of the GECCO Humie awards! The Genetic and Evolutionary Computation Conference (GECCO) is the largest annual conference on evolutionary computation.
With this set you can also play the hexagonal version of Pentalath (also invented by LUDI), Susan (by Stephen Linhart), Taacoca (by Vikingur Fjalar Eiríksson), Cross (by Cameron Browne) Yavalade, Yavalanchor, Quantum Leap and OMEGA (by Néstor Romeral Andrés) and Manalath (by Dieter Stein and Néstor Romeral Andrés) to name a few.
You might wish to take a look at the gigantic Deluxe Edition, too.
UPDATE: You can now purchase the book "Yavalath & Co." in Lulu.com. It contains 15 games playable with the Yavalath set. If you wish to purchase it from me (7 Eur) simply please go here. You can also download the free PDF here. You can see the cover below.
This game is part of the Apocalypse Pack!
You can also try the Java version here!