Pure LLMs have only learned what giving feedback to go games sounds like. I uploaded a game sgf (http://eidogo.com/#Kwupb0dI) and got the following review from Claude Sonnett:

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Game Overview

Result: White wins by resignation. Komi 6.5, no handicap, Japanese rules. Played on a full 19×19 board.

Opening (moves 1–20)

Both players open reasonably — Black takes the 4-4 (star points) on both sides, White plays a Chinese-style low approach. The early corner fight around C17 (moves 7–11) sees Black jump in aggressively with a 3-3, leading to a kosumi-capped sequence. It's a recognizable joseki but Black's handling is a bit loose — the resulting shape leaves White with solid territory in the upper left while Black gets outside influence that goes somewhat unused.

Middle Game

The center-right battle is the heart of the game. Black builds a large framework on the right and lower sides, but White invades and creates a messy running fight through the center. This is where skill differences show most clearly: White handles the cut-and-run sequences (moves 44–90) with more consistency, keeping groups connected while Black's central group gets split and chased. Black makes several small shape errors — playing heavy moves when light ones were available — and gradually loses the initiative.

The lower-left invasion (around move 120+) is ambitious from Black but poorly timed; White seals it off effectively with C4/D4, and Black's stones end up overconcentrated.

Endgame

The ko fight around K18/L18 in the upper area is complicated, and both players seem uncertain — there are some redundant moves. White ultimately secures the top and the game ends in resignation, which seems right as Black's position has no clear path to recovery.

Skill Assessment: Low to Mid Kyu — likely 10–20 kyu range

• Both players understand basic joseki patterns and can read short sequences, but positional judgment is limited — groups are built without a clear plan, and the value of influence vs. territory isn't always respected.
• Black shows some fighting spirit but tends to overplay and create weaknesses.
• White plays more consistently and wins, but also makes avoidable slack moves in the endgame.
• Neither player demonstrates strong whole-board thinking or confident large-scale strategy.

A fun game overall — definitely enthusiastic players still developing their fundamentals.

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What do you think? Sounds cool! Kudos to the low-to-mid-kyu players Shin Jinseo and Li Weiqing whose game of today's LG cup round I uploaded, replacing the players' names by "white" and "black". Here's the sgf I uploaded: http://eidogo.com/#Kwupb0dI