jrunPowChessM{"in":1,"ref":["6bbaf994eb12241aa9614364d134c89d6fbb0a97c16a06bcfb9d3ba0a3eacb7c_o1"],"out":["5abaca939235db2f754a5e94c9dd95f407688b3beab2334c7f720b3e0e283f4b"],"del":[],"cre":[],"exec":[{"op":"CALL","data":[{"$jig":0},"concatenateSan",[{"san":"4.O-O"}]]}]}
https://whatsonchain.com/tx/5a8ff9b44b9011f62d2059d4d63deeba8054c3100cfd7699dc7cde7e6fed7d36