The lottery part 403 performs a lottery in which the selection probability of a combination, in which at least one of the same kind of symbols is included in each symbol row, is higher than the selection probability of a combination other than the combination when it is determined to be missing by the determination part 402. 抽選部403は、判定部402によってハズレであると判定された場合に、各図柄列に同一種類の図柄が少なくとも一つ含まれた組み合わせの選択確率を、当該組み合わせ以外の組み合わせの選択確率よりも高くした抽選をおこなう。 - 特許庁