The new addition (Vasik Rajlich) to Fritz team will make this chess engine top one again

The new addition (Vasik Rajlich) to Fritz team will make this chess engine top one again

Oct 16, 2015, 12:54 PM |

New hopes for the team of Fritz 15 with the new member for its team Vasik G. Rajlich

"New author, new engine
Vasik Rajlich is new to the Fritz team. The American shook up the world of computer chess just a few years ago, reaching the top with his program, “Rybka”. He is the author of the new Fritz 15 engine, so there’s no question that it will be one of the world’s strongest!" 

Vasik G. Rajlich,
a Czech-American (born 1971 in Cleveland, Ohio)

For the new chess player that does no familiar with this giant of the chess engine developer; He was the creator of Rybka a very powerfull chess engine and winner of the top prizes back on 2007

History of Rybka 1.0 and beyond


  • Rybka 1.0 Beta is released Dec 5 as a free download, and after a week the "Rybka 1" series becomes available on a subscription basis. About 13 "beta" versions of Rybka 1.0.1 were released over the next few months. Rybka 1.0.1-Beta-(x)? competed (as Rybka beta) and won first place in Paderborn (December 27 2005) [13].
  • The first commercial version, Rybka 1 end of 2005.


  • On June 10 (date from RybkaChess FAQ about Rybka 2.x), the MP-only Rybka 2.0 Beta is released. The date on various executables are Apr 23 (Beta 8) and May 17 (Beta 4).
  • Rybka (under the name Rajlich) competed in the 2006 ICGA Chess Tournament [14]
  • Rybka 2.1 was released Jul 26, 2006.
  • Rybka 2.2 was released Nov 10, 2006.
  • Rybka 2.2n2 was released Dec 14, 2006. All these dates are from the RybkaChess FAQ about Rybka 2.x (though that page seems to disappear every now and then).


  • Rybka 2.3 was released in late Feb 2007 (?). There was an "LK" version that had minor differences.
  • A few more "2.3.1 beta" versions also appeared around this time (again including Kaufman's latest material imbalance numbers). The Rybka 2.3 evaluation function appears to retain the numerology from Rybka 1.0 Beta. Rybka 2.3.1 starts to make a few changes (due to Kaufman?) in the numbers, though keeping the structure largely intact.
  • Rybka 2.3.2 was released Jun 13, 2007, and 2.3.2a about 5 days later.

Won ICGA Tournaments

to read more about it