Grand Master Mind 1978 Invicta Plastics

	Master Mind Grand	(#1) 1978 (#2) later than 1978	Invicta Plastics Leicester UK and New York US
	First produced	1972	Players	2	Age(s)	10+

Click either picture for more		#1		1 x decoding board; - 10 rows of felt covered code spaces - 10 rows of large key peg holes - 2 rows of score holes - 4 shielded felt covered spaces for the hidden code - 3 peg compartments 1 x shield 1 x pack of 60 key pegs; - black (20), white (20), blue (20) 2 x black score pegs 2 x white score pegs 1 x pack of 60 shape counters, 5 sets of 12 1 x pack of 60 colour counters, 5 sets of 12 1 x rules leaflet Grand Mastermind is a game of cunning and logic. The code maker sets up 4 pairs of hidden counters in a line of shape (5):colour (5) combinations. Then the code breaker has 10 chances to duplicate the line. The code maker replies by placing key pegs (or not) alongside each attempt; - black, to confirm the code pair and correct sequence - white, to confirm the code pair but incorrect sequence - blue, to confirm one code peg only is correctly placed - nil, no peg correct Code of 4 entries / 25 options per entry, 10 tries. New to this edition; - the box lid picture is changed and now shows a younger man in the same shot - - the black and white photo and layout of the box base are updated - the plastic counters are thinner and some counter shapes are different
Click either picture for more		#2

Game play 1. Players take turns to be the code maker who places 4 shape counters in the squares and 4 colour counters in the round areas behind the shield. Each attempt by the code breaker is left in position throughout the game. The code maker replies by placing black, white, blue or no key pegs alongside the attempt. Four black key pegs placed means the code has been correctly determined. The winner is the player who uses the least decoding lines. Small pegs placed on score tracks on the right side of the board keep score. Players agree beforehand the number of games or target score and time limit per row.
Game play 2 for advanced Grand Master play. The code maker may use blank spaces, hence there are 6 possible options per space allowing 1,679,616 permutations. Game play 1 provides 390,625 permutations.

Awarded Game of the Year in the 70s.