After 20 games the score is tied 1-1 with 18 draws. No change in the score after 10 straight draws. The openings are still drawish for these engines, the highest eval seen in the last 10 games was a little above 1 for a few moves by Stockfish in game 15, King's gambit accepted.
Games 11-12 started with white up a knight for 2 pawns, the white king castled and exposed. In game 11 Leela move its queen forward on the king side and castled long. Stockfish completed developing the queen side, the black queen was alone in its attack and it retreated. Leela pushed a pawn in the center, Stockfish chose not to trade it to keep the file closed and it became a passer on the 6th rank. Leela gave a rook for a bishop and pushed the passer to the 7th rank, this compensated for the material loss. The engines stopped moving pawns and the draw rule ended the game. In game 12 the white king walked to the center, Stockfish pushed pawns on the king side and castled long. Leela kept the king side closed and blocked the pawns with its king and queen. Stockfish pushed pawns and blocked the queen side, then the engines started to shuffle. After 45 moves the engines traded a pair of pawns, Leela closed the file with a knight and shuffling resumed. Leela only lowered its eval for the 50-move draw.
Games 13-14 started in the Vienna gambit and a small bias for black. In game 13 the engines opened the king side and Stockfish regained the pawn. Both engines castled long after a few minor piece exchanges. All rooks were exchanged and the game reached a QBN vs QBN position with evals close to 0 on move 23. The engines mostly shuffled for a while, then resumed exchanges that led to an opposite color bishop ending. The game was adjudicated 15 moves later. Game 14 repeated the reverse for a while, this time Leela chose to castle short in the exposed king side. Stockfish castled long, again there were many exchanges and the game reached a RB vs RN position on move 24. Evals were close to 0, the engines exchanged rooks and continued to play until the pawn moves stopped.
Games 15-16 started with a KGA Scallopp defense, again a small bias for black. In game 15 Stockfish gave a 2nd pawn temporarily, then captured 2 pawns back and equalized material. Leela castled long while the white king was exposed. The engines exchanged many pieces and the game reached a RB vs RB position, with the white king safe. Leela was up a pawn but evals were close to 0, the game was adjudicated quickly. In game 16 Leela castled immediately and Stockfish's (negative) eval increased. Leela forced the black king to move, Stockfish developed its pieces slowly. Stockfish's eval was over 1 for a few moves, then came down when it saw it didn't have a safe attack on the white king. Queens were exchanged, the engines continued to exchange pieces until only R vs BN remained. The engines mostly shuffled for over 60 moves before Stockfish lowered its eval for the draw rule.
Games 17-18 started with a 2-ply book 1. d4 f5 of the Dutch opening. Stockfish played Bg5 in game 17, Leela pushed pawns on the king side and the bishop retreated. Both engines castled short, Stockfish opened the queen side and went a pawn up with a passer on the a file. There was a series of exchanges and the net result was that Stockfish gave a bishop for 3 pawns. Stockfish gave its queen for a rook, this allowed the passer to promote while Leela captured another bishop. In the end the imbalance was R vs BB, evals were close to 0 and the engines did not move pawns so the game was cut short. Leela tried a different approach in game 18, the king side pawns stayed behind and there were many minor piece exchanges in the center. The engines opened a file on the queen side and after a while exchanged a pair of rooks. A series of exchanges led to a queen ending, Leela was a pawn up but when it started repeating the game was adjudicated.
In game 19 the white king moved forward early. Leela developed its queen side slowly and evals favored white though under 1. Leela castled and Stockfish pushed pawns on the king side. Leela remained calm, Stockfish's eval slowly came down as it did not find an effective attack. The engines shifted their focus to the center, a series of exchanges left a QRB vs QRB position with white a pawn up. Then another series of exchanges led to a drawn rook endgame. Game 20 started with a similar setup, with the white king moving forward. Stockfish chose not to castle, after a file opened in the center Stockfish moved its king to the queen side. Leela placed a supported knight on e7, the engines reduced to a QRN vs QRN position and Stockfish gave a rook to get rid of the dangerous white knight. Leela's king was exposed, Stockfish used this to give checks with its queen and the game was adjudicated.
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