Entropy (1977 board game)
The game is played on a square 7×7 grid of cells. One player ("Chaos") draws coloured chips at random from a bag and places each one on the board in an empty space. For each chip that is placed, the other player ("Order") may slide any chip horizontally or vertically through empty spaces, to rest in a previously empty space. When the grid is full, Order scores for any palindromic patterns of chip colors (e.g. "red–green–blue–green–red") that have been formed horizontally or vertically.
The game has been included as one of the events at the annual Mind Sports Olympiad since its inception. Demis Hassabis had won this event a record five times until losing in 2007. The event has also been won by Hassabis's brother George and by another Pentamind champions, David M. Pearce, Alain Dekker, Paco Garcia de la Banda and Andres Kuusk.
- 1997: Murray Heasman (England)
- 1998: Peter Horlock (England)
- 1999: George Hassabis (England)
- 2000: Demis Hassabis (England)
- 2001: Demis Hassabis (England)
- 2002: David M. Pearce (England)
- 2003: Demis Hassabis (England)
- 2004: Demis Hassabis (England)
- 2005: Peter Horlock (England)
- 2006: Demis Hassabis (England)
- 2007: David M. Pearce (England)
- 2008: Peter Horlock (England)
- 2009: Alain S. Dekker (South Africa)
- 2010: Paco Garcia de la Banda (Spain)
- 2011: Peter Horlock (England)
- 2012: Andres Kuusk (Estonia)
- 2013: Andres Kuusk (Estonia)
- Hyle at BoardGameGeek
- Article about Entropy, http://www.boardability.com/game.php?id=entropy, Retrieved on 6 September 2010.
- Entropy, Mind Sports Olympiad supplement, p 8, The Times, 11 August 1997, online version available from studiogiochi MSO archives 
- Stephen Moss, This time it's personal, The Guardian, 27 August 2007, Retrieved on 13 June 2010.