FunChessEngine

Follow a position from legal moves to search to evaluation. The recorded self-play demo below shows the engine choosing for both sides.

_{JavaScript · Python · HTML · CSS · Makefile · Shell · latest push 2026-09-11}

PianoMirRustPublic

Follow audio through pitch evidence and alignment with a known score. Open the lab results below to see what the captured example actually measured.

_{Rust · Python · latest push 2026-09-12}

kitcoscraper

Explore the path from a web source to extracted data. The project notes show its latest public change.

_{JavaScript · latest push 2026-09-11}

the-great-prompt-off

Explore a project organized around comparing prompts. The project browser below contains its current languages and latest public activity.

_{TypeScript · PLpgSQL · JavaScript · CSS · latest push 2026-08-30}

The system was given the score. It checks whether the audio agrees with that score. These component scores are separate measurements, not percentages to add together.

This result does not measure a pianist’s skill or prove that the system can transcribe unfamiliar music. The input is synthesized, with no human performance.

No. This example measures agreement with a known score on synthesized audio. It does not grade a human performance.

No. The language charts measure bytes in public repositories. They describe the codebase, not proficiency.

No. Search depth, evaluation quality, move ordering, and the position itself all matter. A node count alone does not measure move quality.

The lights blink in pairs. Beneath the reeds, a tiny frog is trying to debug the moon’s reflection.

A beetle guards a tiny chessboard. “One move,” it says. “Then you may pass.”

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Each chapter covers two full turns. The diagram shows the position at the end of that chapter; the highlighted square is the last move’s destination.

N = knight, B = bishop, R = rook, Q = queen, K = king. A move without a piece letter is a pawn move; x means capture, + means check, and # means checkmate.

A half-move is one player’s turn. Nodes count positions searched; depth is the reported search depth. Zero nodes means no search was recorded for that move.

A frog starts on pad 0 and wants to reach pad 4. It can hop forward by one or two pads. How many distinct sequences of hops reach pad 4 exactly?

Three fireflies can each be on or off. How many distinct patterns can they display, including all off?

Eight pebbles look identical. Exactly one is heavier. With a balance scale, can you always find it in two weighings?

Chroma groups pitches into the twelve pitch classes, ignoring octave. The left column comes from the known score; the right comes from analysis of the synthesized audio.

Longer bars mean stronger normalized evidence within that representation. They are not probabilities, loudness readings, or performance grades. The score and audio columns use their respective recorded normalizations.

These four frames are sampled near 0, 3, 6, and 9 seconds. They are individual snapshots, not averages across each three-second interval.

Which pitch class has the longest bar on the audio side? How closely does its pattern resemble the known score?

Which pitch class has the longest bar on the audio side? How closely does its pattern resemble the known score?

Which pitch class has the longest bar on the audio side? How closely does its pattern resemble the known score?

Which pitch class has the longest bar on the audio side? How closely does its pattern resemble the known score?