Game 6: AB-JChess vs Pikafish, read by both engines

AB-JChess vs Pikafish: two wins, read by both engines

95 moves

Game 6 of the 2026-09-29 match, 400 games at 4 seconds a move: AB-JChess red, Pikafish black. Both engines scored every position again: AB-JChess at 1 million nodes, the fixed Pikafish at 64 million; scores are expected results, a draw counting half. Marks are Pikafish's moves as…

?! By AB-JChess's count this drops Pikafish from 51% to 45%; it preferred cannon h8-e8, the line beside this move. Searched longer, AB-JChess rates them the same (Black 49%); Pikafish prefers the game move (Black 55% against 50%).

Black's face-down piece on i10 came up a chariot and took a horse; Red's piece on i1 takes it back and comes up a horse. AB-JChess: Red 66%. Pikafish: Red 53%.

AB-JChess preferred face-down piece d10-e9, but by its count the game move cost under 5 points. Searched longer, AB-JChess keeps its choice (Black 24% against 23%); Pikafish prefers the game move (Black 48% against 30%).

AB-JChess's chariot takes the advisor on d7 and offers the chariots. AB-JChess: Red 77%. Pikafish: Red 47%.

The chariots are off: Red has one left and Black none, and the seven pieces Black has not turned over can only be five soldiers and two horses. AB-JChess has Red at 83%; Pikafish has Red at 48%, and in the game it reported Red at 50%.

?! By AB-JChess's count this drops Pikafish from 21% to 15%; it preferred face-down piece c10-e8, the line beside this move. Searched longer, AB-JChess keeps its choice (Black 16% against 14%); Pikafish agrees (Black 43% against 37%).

Red's chariot reaches Black's back row. AB-JChess: Red 89%. Pikafish: Red 65%.

The chariot has taken two horses on the back row. Pikafish now has Red at 87% and stays above 80% to the end; AB-JChess got there on move 17.

Black has no legal move and loses.