This game pair (each engine plays both sides of the same opening) featured a dubious line of the Two Knights Defense: 1.e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5?! This extremely risky recapture has been described by IM Lawrence Trent as a move that is "certainly not to be recommended". Forced to defend the Black side of this opening, Stockfish steered the game to a cheerless and passive but tenable position, similar to what Fabiano Caruana had done in Game 9 of the World Chess Championship 2018. Like Caruana, Stockfish faced a long defensive task with no active plans of its own, but also like Caruana, Stockfish was able to hold the position. Meanwhile, when it was Leela's turn to defend with Black, it sought complications and wound up in a chaotic position (diagram). Stockfish's "trench warfare" playstyle fared better than Leela's in this game pair, and Stockfish won this opening by winning with White while drawing with Black.