| 摘要 |
PROBLEM TO BE SOLVED: To prevent a skilled player from immediately discriminating whether an arrangement of symbols for a chance appears because of inappropriate timing for operating a stop switch 60 or because of a fake chance. SOLUTION: In a slot machine, a specific arrangement of symbols aligned on a prize winning effective line for a specific prize, an arrangement of symbols for the chance which makes the player expect an appearance of the specific arrangement of symbols but results in no prescribed symbol aligned on the prize winning effective line, and a non-winning arrangement of symbols which has no prescribed symbols aligned on the prize winning effective line and never makes the player expect any appearance of the specific arrangement of symbols are defined. A stop control means 130 implements a specific stop control in which the specific arrangement of symbols appears, a chance stop control in which not the specific arrangement of the symbols but the arrangement of symbols for the chance appears, and the non-winning stop control in which the non-winning arrangement of symbols appears. In a game of winning a specific prize, the stop control means 130 selects the specific stop control or the chance stop control at a prescribed probability and carries out the selected one. In a game ending with a prescribed lottery result different form the winning of the specific prize, the stop control means 130 selects the chance stop control or the non-winning stop control at a prescribed probability and carries out the selected one. COPYRIGHT: (C)2005,JPO&NCIPI
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