After introducing the first 4 boards on the Big Variation of the ODC, we see that Black has much to overcome and Red would either retain his lead or expand on it. It is a natural flaw. For professional Xq players, the Big Variation was not very popular and even now, it is very seldom seen.
In this board, the main discussion is on red using the Riverbank Cannon. It is interesting to see how Black reacts to this.