One thing I always wondered is how many moves, on average, do you have to play before reaching a position that has never before seen on Earth?
Or maybe the question should be what percent of games reach a position that has never before been seen?
Or maybe the question should be what percent of games reach a position that has never before been seen?
Another distinction needs to be made between positions seen and positions played. Almost every viable position will have been seen in preparation well beyond 10 moves. But seeing them on the board is rarer.