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Home * Engines * Frenzee

Frenzied [1]

a Chess Engine Communication Protocol compatible chess engine by Sune Fischer, written in C++ and capable to play Chess960, first released in January 2002 [2] as ChessCraft [3] and soon renamed to avoid confusion with Crafty [4]. Frenzee is a bitboard engine using Rotated Bitboards to determine sliding piece attacks [5]. It applies PVS and null move pruning, has its own book learning technique, and is able to probe Nalimov tablebases. The parallel searching version Deep Frenzee shares the transposition table [6]. Frenzee further supports UCI in analyze mode.

Tournament Play

Frenzee played five consecutive CCT Tournaments, starting with CCT5 in January 2003, and two strong ACCA World Computer Rapid Chess Championships, the WCRCC 2007 and WCRCC 2008.

Selected Games

WCRCC 2008, round 5, Frenzee - ZCT [7]

[Event "WCRCC 2008"]
[Site "Internet Chess Club"]
[Date "2008.06.21"]
[Round "5"]
[White "Frenzee"]
[Black "ZCT"]
[Result "1-0"]

1.e4 e5 2.Nf3 Nc6 3.c3 d5 4.Qa4 f6 5.d3 Be6 6.Be3 Nh6 7.Bxh6 gxh6 8.Nbd2 Qe7 9.O-O-O d4 
10.cxd4 exd4 11.Nxd4 Qc5+ 12.Nc2 O-O-O 13.Nf3 b5 14.d4 bxa4 15.Ba6+ Kb8 16.dxc5 Rxd1+ 
17.Rxd1 Bxc5 18.Bb5 Ne5 19.Ncd4 Bxa2 20.Nxe5 fxe5 21.Nc6+ Kb7 22.Bxa4 Rg8 23.Rd2 Rxg2 
24.b4 Bxf2 25.Rxa2 Be3+ 26.Kb1 Rg1+ 27.Kc2 Bf4 28.Kd3 Re1 29.Kc4 Rxe4+ 30.Kd5 Re3 31.Bb5 
Rc3 32.Rxa7+ Kb6 33.Ra5 Be3 34.Nxe5 c6+ 35.Bxc6 Kc7 36.Ra8 Bg1 37.Rh8 Bxh2 38.Rxh7+ Kc8 
39.b5 Bg1 40.Nc4 Rd3+ 41.Ke6 Re3+ 42.Nxe3 Bxe3 43.Bb7+ Kb8 44.Kd6 Bf4+ 45.Kc6 Be5 46.b6 
Bd4 47.Rc7 Bxb6 48.Rc8+ Ka7 49.Ra8# 1-0

Forum Posts

2002 ...

2005 ...

2010 ...

External Links

Chess Engine

Chess Engine Frenzee - FAQ.txt



  1. Illustration in a 19th century book about Physiognomy (on the left: "Utter despair", and on the right: "Anger mixed with fear"), Wikimedia Commons
  2. Frenzee from WBEC Ridderkerk (Wayback Machine)
  3. New engine? by Odd Gunnar Malin, Winboard Forum, January 14, 2002
  4. Frenzee (Wayback Machine, 2002)
  5. Chess Engine Frenzee - Sources (Wayback Machine, 2006)
  6. Deep Frenzee 3.0 - by Sune Fischer - FAQ
  7. ZCTACCAWCRCC by Zach Wegner, CCC, July 02, 2008

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