Elton John brought his solo piano show to the War Memorial at OnCenter — just Elton and the keys, no band. The setlist drew from across his catalog: “Your Song,” “Daniel,” “Candle in the Wind,” “Bennie and the Jets,” “Can You Feel the Love Tonight.” A soundboard recording of this Syracuse performance survives and circulates among collectors. The intimacy of a solo piano show in a venue like the OnCenter was a rare chance to hear one of rock’s greatest showmen stripped down to the essentials.