A slot machine enables the selection of one or more symbol positions in a symbol matrix to provide additional and/or enhanced awards (“Lucky Spot”). The preferred embodiment of the present invention offers a new “wandering” wild symbol with an associated multiplier value, as follows: ...http://www.google.com.tw/patents/US7704141?utm_source=gb-gplus-share專利 US7704141 - Slot machine game having a plurality of ways for a user to obtain payouts based on the selection of one or more symbol positions in the symbol matrix (“Lucky Spot”)
