Two decisive minimatches in a row, one win per engine, Stockfish's lead is still 6 points.
The engines castled in opposite directions in game 71. Stockfish's eval was over 1 as it concentrated its pieces on the king side. Komodo started a series of exchanges in which it gave a rook for a knight and pawn. After exchanging queens only RRB vs RBN were left.
Evals constantly increased though the material difference was not that significant. Stockfish brought its two rooks forward, then it gave a rook for a bishop and pawn. Material was equal, but now Stockfish had an advanced passer on the queen side and its eval was over 3.
Komodo gave its knight to get rid of the passer, leaving a RB vs R endgame with black two pawns up. Stockfish protected its pawns with the rook and used its bishop to attack the black pawns on the king side.
The game was adjudicated after Stockfish cleared both the black king side pawns. The h pawn became a passer and Komodo could not stop it without losing material.
Queens were off early in game 72 and evals stayed low. There were many early exchanges, Komodo was a pawn up for a while but Stockfish equalized. The engines reduced to a RB vs RN position, Komodo was again a pawn up but only got a drawn rook ending. Stockfish's lead is now 7 points.
The engines castled in opposite directions in games 73-74, white castled long. In game 73 Komodo gave a piece on the king side, removed the white pawns in the center and threatened the white king on the queen side. Stockfish exchanged queens to stop the attack, then opened the king side while Komodo regained the piece and was a pawn up. Evals were 0, yet the action continued. Stockfish gave a rook for a knight to create a passer on the king side. The engines reduced to a N vs R position, Komodo captured the passer and the game ended in a tablebase draw.
Stockfish was a pawn up early in game 74, though Komodo had a small eval advantage. Stockfish had an open file on the queen side, not enough to put the white king in danger. Evals increased over 1 as Komodo attacked the king side. After exchanging a pair of rooks and opening files on the king side the black king had to run to the other side for safety.
The engines had long PV agreements that were played out. The black king side pawns were left unprotected and Komodo was soon a pawn up with a passer. Evals were over 2 after queens were exchanged, with NN vs BN remaining.
Evals continued to increase and both engines saw Komodo was winning. It took a few moves for it to place the knights and then Komodo pushed a central pawn forward, creating a second passer.
The game was adjudicated, Stockfish's PV showed that the win was still not obvious, white could remove the black pawns with two passers left. Komodo gets its 3rd win, Stockfish's lead is back to 6 points.
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