1850-Rated Club Player Uses Stockfish 16.1 at Depth 34 to Confirm Loss Was Entirely Opponent's Fault

A 1850-rated club player left Stockfish 16.1 running to depth 34 overnight and entered in his postmortem file that Saturday's defeat was his opponent's fault, according to an engine review saved at 11:52 p.m., a clock transcript from the round, and a receipt.

The game was round four of the weekend open, 90+30, and followed an Italian Game (ECO C50) through the standard tabiya — 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.d3 d6 6.O-O O-O 7.Re1 a6 8.Bb3 Ba7 — a line he had prepared to move fourteen and had once given a lecture on. He had White. He lost on the board, on move forty-seven, having spent six minutes and twelve seconds on move twenty-seven alone.

The engine review he filed does not dispute move twenty-seven. At that point the evaluation moved from −0.6 to −3.1 on his move; his opponent's reply then moved it to −2.9. That 0.2 is the entire case, and it is stated four times in the document, once as a screenshot, once as a two-line note, and twice in the subject line of an email to the tournament director.

What the engine also flags, and what the file reports in smaller type beneath a fold, is the clock. At move thirty-four he had forty-one seconds. The position required a queen trade he had declined twice; the practical consequence he missed was not the evaluation but that declining it cost him the increment twice in a row, leaving him to defend a worse ending with a hand that was already moving before the choice was made.

His housemate, Tessa Fenn, has become the paper's standing witness on what not to say. "He keeps saying 'objectively,'" Fenn reported. "I asked what happened subjectively and he said that isn't how it works. He has asked me eleven times whether I think the opponent saw it. I said I was watering the plants. I was not watering the plants."

The computational weight behind the finding has a paper trail, which is where this desk comes in. On the Monday after the round he bought a used graphics card from Basil Holloway's shop, listed in Holloway's stock book as "returning, no returns," for $180 in cash. Holloway, asked what the buyer intended to run on it, said the man had described the workload as "a settled matter." The card has since logged thirty-one hours of analysis across six sessions, five of them after midnight.

Inez Gable of the standards board, consulted on whether the depth-34 file constituted evidence of the opponent's fault, issued the ruling everyone is now quoting: "Depth is a claim. The result is a result. The board writes in one hand." Gable added that a submission identifying a second-worst reply as the cause of a loss identifies a loss.

Beneath the thread where he posted the review, a reply appeared with the evaluation written to two decimals, no argument attached, and an avatar of a knight. He has not answered it. He has, according to Fenn, already opened his next opening file, a different one, from a different repertory, selected at 12:40 a.m. while the fan on the new card ran audibly in the next room.

The receipt is filed under equipment. Under findings, the document still reads: opponent's fault, depth 34, subject line unchanged.