There were crashes in games 71 and 75, the games were later resumed.
In game 71 Stockfish pushed pawns on the king side and kept its king in the center. The engines opened the queen side and the black king walked to the king side even though there was no pawn protection there. After a few exchanges Stockfish blocked the entry points and the engines started to shuffle. AllieStein could not find a way in, the game ended in a 50-move draw. Game 72 started similarly, AllieStein kept its king in the center and pushed pawns on the king side, its eval turned negative. Stockfish countered on the queen side, it went a pawn up and its eval was 0. AllieStein traded a bishop and knight for a rook, then a series of exchanges led to a RB vs R position, black two pawns up. Stockfish gave its bishop for pawns, the rook ending was a draw and the game was adjudicated when AllieStein lowered its eval.
In game 73 Stockfish's eval was 0 from the start. The engines opened two files, after exchanging a pair of rooks each engine controlled one file. Neither engine attempted to attack and the engines started to shuffle. The pawns stabilized and shuffling continued until a 50 move draw. In game 74 the engines locked pawns on the queen side without exchanges. AllieStein's eval turned negative in the closed position, it captured a pawn on the queen side and evals started to increase. AllieStein gave back the pawn and created a queen side passer, its eval peaked over 3 as it shifted to the king side and tried to break through. Stockfish guarded the entry points and the engines started to shuffle, AllieStein's eval slowly came down. AllieStein avoided the 50-move draw, then gave another pawn and opened a file on the king side. The engines exchanged a pair of rooks and queens and only RBN vs RNN remained, Stockfish a pawn up. For a short while Stockfish's eval jumped to almost 3, it created two passers on the 7th rank, then gave the bishop and promoted one pawn to a queen. However, AllieStein had a passer on the 2nd rank, and it used this threat to force a repetition draw.
AllieStein's eval was over 1 from the start of game 75. Evals started to jump without a visible reason at first. AllieStein pushed pawns on the king side and moved its king forward, leaving the first two ranks empty for its rooks for quick maneuvering. Stockfish's queen was stuck on the queen side, almost out of the game completely.
Evals continued to climb quickly, the white pawns looked dangerous for the black king. Stockfish gave a rook for a bishop and exchanged queens, the game reached a RRN vs RBB position. The black king was out of danger, AllieStein still had better pieces and a material advantage.
Both engines agreed that the material advantage and position was winning for white. AllieStein created an advanced passer on the king side, its PV showed that its plan was to create more passers by giving a rook for a bishop and pawn. The game was adjudicated on move 47.
In game 76 Stockfish pushed pawns on the king side, AllieStein made sure its king had pawn protection. Stockfish's king was exposed, it went a pawn up and had a bishop pair while AllieStein had a pair of knights. AllieStein pushed a pawn all the way to a2 where it was blocked, then it used almost all its time thinking about one move. The engines mainly shuffled for a long while and evals came down. AllieStein traded Q for RB, the game reached a QR vs RRN position and ended in a tablebase position.
AllieStein had an eval over 1 from the start of game 77, it opened the queen side and went two pawns up. Stockfish moved a knight forward and countered on the king side, its eval was at 0 while AllieStein's eval jumped over 2. AllieStein pushed a passer to the 7th rank, Stockfish captured it there and after a series of exchanges the game reached a QBB vs QRB position with white 2 pawns up. The engines exchanged queens and black had no more pawns. The 8-man position was a draw, AllieStein tried to push its pawns forward but Stockfish prevented their promotion. The game ended in a tablebase draw on move 175. In game 78 both kings were in the center, AllieStein attacked on the queen side and Stockfish on the king side. There were many early exchanges, the black king was forced to move, the white king castled late to escape a mate threat. The game reached a QRB vs QRN position on move 28, queens were then exchanged and the game ended in a tablebase draw on move 47.
In game 79 the engines blocked the center and opened the queen side. After exchanging a pair of rooks Stockfish's eval came down to 0 and the engines mostly shuffled. On move 72 the engines resumed exchanging pieces and the game reached a rook ending, and later a tablebase draw.
In game 80 the engines blocked the center and the queen side. All the pawns remained on the board, the engines slowly pushed the king side pawns until the king side was also blocked. The engines played behind the pawn lines and mostly shuffled, most of the minor pieces were exchanged along open diagonals and evals stayed low. On move 135 the engines exchanged queens and only RRB vs RRB remained, then AllieStein gave a pawn.
Stockfish was careful not to allow the black e pawn to advance. Meanwhile the black king had a path forward on the dark squares. AllieStein hesitated for a while, then decided to walk forward with its king all the way to g3. Stockfish offered the f3 pawn and AllieStein took it.
Stockfish's eval immediately jumped to around 2, AllieStein's eval increased gradually as well. The king side was opened after a few moves and the forward black king was exposed to attacks by the rooks. Stockfish was able to move a rook forward to the 6th rank where the black pawns were unguarded and to capture two.
AllieStein tried to counter by placing its rooks on the 2nd rank but the white king was safe enough and Stockfish pushed the d pawn forward. The pawn promoted to a queen at the cost of a rook, the QR vs RR ending was a win for Stockfish.
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