Payout methods in a mechanical, an electro-mechanical and/or computer-based slot machine-like games-of-chance enable a series of awards based upon: appearance of predetermined symbol combinations in the symbol matrix; issuance of awards for the predetermined combination of symbols; removal of the winning...http://www.google.co.uk/patents/US8083581?utm_source=gb-gplus-sharePatent US8083581 - Electronic game and method for playing a game based upon removal and replacing symbols in the game matrix
