wrapleft.blogg.se - Stockfish development version

#Stockfish development version update

The next section explains how fishnet v2 delivers stronger analysis and does so more quickly, regardless. It also means using NNUE even on old hardware. This means using the smallest common denominator, which is 1 thread and small hashtables. Your server-side analysis will now have consistent quality, no matter which client provided the analysis.

The decision to value consistency and debuggability more than utmost efficiency.

Will now use multi-variant Stockfish only for variant games or games with exotic material combinations, for a ~10% efficiency improvement.

fishnet now available for aarch64, with Stockfish built using emulation on GitHub actions.

This is important, because Stockfish 12 benefits immensely from the availability of vector instructions and brings a much wider array of possible target features.

Each of these are asynchronous tasks that talk over channels.īeing a systems programming language, Rust also has convenient access to detect CPU features and pick the best corresponding Stockfish build, rather than this terrible hack in Python, which uses ctypes to allocate executable memory and runs hardcoded machine instructions. Rust’s type and ownership system is amazing at catching issues at compile time, and it was refreshing to be able to confidently do major refactorings on concurrent code.įishnet is using tokio for asynchronous communication with the Lichess API, a local queue, the engine processes, and the user who can stop the client at any time. To pay back technical debt, it has now been rewritten in Rust. fishnet started as a short and simple Python script that accumulated a lot of features over time. Server side analysis on Lichess is brought to you by fellow users who volunteer their CPU time using the fishnet client. After the jump to SF_NNUE, some gains are specific to NNUE, others apply also to Stockfish with NNUE turned off.Ĭongratulations to all Stockfish contributors! fishnet v2, rewritten in Rust SF_classical is the final development version before SF_NNUE landed. The following graph shows the strength improvements over the last Stockfish releases.

Stockfish remains a CPU based engine, and provides various build targets to progressively take advantage of modern vector instructions.

#Stockfish development version update

The main innovation is the ability to incrementally update the evaluation after moves, instead of evaluating the entire neural network from scratch. NNUE optionally replaces the handcrafted evaluation function with a neural network.

Picking the best build of Stockfish for the contributor's hardware from the additional available targets.Īmong other improvements, Stockfish 12 brings a major new feature, NNUE (or ƎUИИ, for Efficiently Updatable Neural Network).

Optimized "queuing" of games for analysis, meaning shorter waits.

Analysis tabs once again remember if you turned the engine on or off.Ī new version of fishnet, Lichess's distributed analysis software, is available.

Stockfish 12 (classical, not NNUE) is now available for local analysis.

Stockfish 12 NNUE is more than 100 Elo stronger than the previously used version of Stockfish 11.

If you’re not interested in all the technical details, here’s a short summary: Three months after its groundbreaking release, Stockfish 12 (or rather the current development version of Stockfish 13) is finally available on Lichess, for both server and client side analysis.