But this doesn't disprove that:
1. It definitely regurgitates opening theory, much more than can reasonably be calculated at its strength.
2. It might be regurgitating tactical sequences that appear in a lot of positions but remain identical in algebraic notation. Famous example:
1. Nxf7+ Kg8
2. Nh6++ Kh8
3. Qg8+ Rxg8
4. Nf7#
This smothered mate can occur in a huge variety of different positions.
There's some qualitative evidence for this in the games.
In one of the games it has a bishop on f6 as white. It plays Qxh6?? Kxh6 and then resigns due to illegal move. I'd bet good money that illegal move was Rhx# where x is 1-4. So it seems like in some these positions it's filling in a tactical sequence that often occurs in the vicinity of recent moves, even when it's illegal or doesn't work tactically.
