Patent ID: 8162731

Claim:
A game machine comprising, arrows, a target, a sensor for detecting an area of said target where pressure is put when said pressure is put, a control unit to which a detecting result of said sensor is input, a display monitor controlled by said control unit, a target impact judgment means for identifying and distinguishing between an arrow impact and a push impact, wherein criteria for distinguishing between the arrow impact and the push impact comprises impact time duration, and a valid arrow throw judgment means for judging whether throws of said arrows, respectively, are valid or not, wherein said target is divided into a plurality of areas each of which an indicator is allocated to, said arrows are thrown by said plurality of players successively, and a game is proceeded according to indicators of said areas hit by said arrows, and wherein said valid arrow throw judgement means judges 1st and 2nd conditions, that is, HD×PT>ND 1st condition: HD×S×G×TD>TT, 2nd condition: where, ND: number of times of said pressure on said target, TT: time length necessary for said pressure of ND times, HD: number of times, among ND times, that said target impact judgment means judges said target is push by other means than said arrows, PT: a threshold of hand-push ratio (HD/ND), TD: a threshold of said time interval of said arrow throw, S: a coefficient concerning single, single game or doubles game, and S=1 when single, and S=2 when doubles, and G: number of groups, so as to judge whether a given arrow throw among said throws is invalid when either said 1st or 2nd condition is fulfilled.