Chess tournaments Chess strategy Computer chess Chess players FIDE Chess variants Chess rules and history

Shredder - software

Original author(s) Stefan Meyer-Kahlen
Initial release 1993
Type chess engine
License proprietary

Shredder is a commercial chess program and Chess engine developed in Germany by Stefan Meyer-Kahlen in 1993. Shredder won the World Microcomputer Chess Championship in 1996 and 2000, the World Computer Chess Championship in 1999 and 2003, the World Computer Speed Chess Championship in 2002, 2003, 2004, 2005, and 2007, and the World Chess Software Championship in 2010.

On the January 24, 2007 CEGT rating list, Deep Shredder 10.0 placed fifth, with a rating of 2855 - 5 points below LoopMp, 22 points below Deep Fritz 10, and 160 points below #1 ranked Rybka 2.1, which had a rating of 3015.

Version 10.0 was released in June 2006. Version 11.0 was released in October 2007. Version 12 was released in January 2010. The "Deep" version takes advantage of multiple CPUs or multiple core CPUs.


Shredder has won a number of computer chess tournaments since its inception:

Year Location Title
1996 Jakarta Micro Computer World Champion
1999 Paderborn Micro Computer World Champion
Computer Chess World Champion
2000 London Micro Computer World Champion
2001 Maastricht Micro Computer World Champion Single CPU
2002 Blitz World Champion
2003 Graz Computer Chess World Champion
Blitz World Champion
2004 Tel Aviv Blitz World Champion
2005 Reykjavík Blitz World Champion
2006 Mainz Chess960 World Champion
2007 Amsterdam Blitz World Champion
2010 Kanazawa Chess Software World Champion


Shredder is one of the few commercial chess programs which is available not only for Windows and Mac OS, but also for Linux. Shredder is also available on the iPhone, the iPad and Android.

Sample game

The following game was played between Shredder (playing as Black) and List at the 2003 World Computer Chess Championship. Shredder sacrifices a piece in exchange for a strong initiative in a position too complex for the computer to calculate to the end.

  1. e4 c5
  2. Nc3 e6
  3. d4 cxd4
  4. Qxd4 Nc6
  5. Qa4 Bc5
  6. Nb5 Nf6
  7. e5 Nxe5
  8. Bf4 Nfg4
  9. Nh3 f6
  10. Be2 h5
  11. Bxg4 hxg4
  12. Bxe5 fxe5
  13. Qxg4 O-O
  14. O-O-O d5
  15. Rhf1 Bd7
  16. Nc3 Rc8
  17. Kb1 Bd4
  18. Ne2 Bxb2
  19. Kxb2 Qb6+
  20. Kc1 Qa6
  21. Rd2 Rc4
  22. Qg6 Be8
  23. Qd3 Qxa2
  24. Kd1 Qa1+
  25. Nc1 Ba4
  26. Qg6 Rf6
  27. Qg5 Rf5
  28. Qe3 Qb2
  29. Qe2 e4
  30. f4 e3
  31. Qxe3 Bxc2+
  32. Ke2 Re4 0-1

Graphical front-ends

Read more: