Berg saw BÃ 1\/4 chner 's play Woyzeck in 1914 . The opera is based on the drama Woyzeck left incomplete by the German playwright Georg BÃ 1\/4 chner at his death . Berg attended the first production in Vienna of BÃ 1\/4 chner 's play on 5 May 1914 , and knew at once that he wanted to base an opera on it .