Mastermind sometimes called Code Breaker is not the Quiz show with the black chair and spot light but is the game where the opponent uses information from each of their guesses to try and deduce the hidden code. It is a combination of a Psychological Game and calculation. It is important not to react too strongly to your opponents move until they have completed them. In high pressure situations even marking the code can be demanding with a mistake having cost many a match. The competition is normally played with just 4 slots / holes and 8 colours but the puzzles go as high as 5 slots and 9 colours. It is one of the 10 games in the Decamentathlon.
Mastermind at the MSO is played with 8 colours and 4 holes. No blanks allowed. A guess is made then the setter has to mark the code a red (or black) small peg for each colour that is in the right hole and a white small peg for each colour that is right but in the wrong hole. A repeated colour only gets a white peg if the colour is repeated in the code. For tournament conditions if the setter marks incorrectly when they hit the clock then the guesser counts as having got it right on the next move (or on the mmistake line if the guess was in fact the solution). The code should be set using the coloured pegs from a neutral set and the guesser should wait well away from both the neutral set and the board until summoned. Mastermind problems that have been used as a tie-break in the past can go as high as 5 holes and 9 colours and this is also the case for the Decamentathlon
You can find out about opportunities to play Mastermind live at the timetable. Please report any external links that have broken or have changed to contain inappropriate material. More information about how tournament play works can be found in clocks and in MSO rules.
MSO Mastermind Champions
|2012||Dario De Toffoli||Italy||Olympiad Champion|
|2011||George Lane||England||Olympiad Champion|
|2010||Dario De Toffoli||Italy||Olympiad Champion|
|2009||George Lane||England||Olympiad Champion|
|2008||Dario De Toffoli||Italy||Olympiad Champion|
|2007||George Lane||England||Olympiad Champion|
|2006||David Pearce||England||Olympiad Champion|
|2005||George Lane||England||Olympiad Champion|
|2004||Piero Zama||Italy||Olympiad Champion|
|2003||David Pearce||England||Olympiad Champion|
|2002||Stephen Rowe||England||Olympiad Champion|
|2001||Jan Stastna||Czech Republic||Olympiad Champion|
|2000||Bob Coull||England||Olympiad Champion|
|1999||Karel Daelemans||Belgium||Olympiad Champion|
|1998||Shanker Menon||India||Olympiad Champion|
|1997||R. Coull||England||Olympiad Champion|
Full results and other winners can be found in Results.
MSO Mastermind Ranked Players: