official-stockfish

Issues somebody may already be working on are listed last. List everything by date

• Stockfish misses threefold repetitions when there are castling rights but castling is illegal

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/Stockfish#7280 · 12 comments · 2 reactions · Opened Nov 2, 2026

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• Zobrist hash collision leading to Stockfish declaring false 3-fold draws

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/Stockfish#7279 · 27 comments · 1 reaction · Opened Nov 2, 2026

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• SF19 reports too short mates in MultiPV sidelines

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  official-stockfish/Stockfish#7247 · 11 comments · Opened Oct 22, 2026

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• How to start it?

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  Difficulty 1/5 Under an hour Newbie friendliness 48/100

  official-stockfish/Stockfish#7233 · 2 comments · Opened Oct 18, 2026

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• Warning while compiling

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  Difficulty 3/5 Half a day Newbie friendliness 40/100

  official-stockfish/Stockfish#7223 · 3 comments · Opened Oct 13, 2026

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• Something weird with task links

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  bug gui

  Difficulty 3/5 1-2 days Newbie friendliness 45/100

  official-stockfish/fishtest#2614 · 8 comments · Opened Oct 13, 2026

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• Stockfish reports a too short mate

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  Difficulty 5/5 Over a week Newbie friendliness 12/100

  official-stockfish/Stockfish#7221 · 21 comments · Opened Oct 12, 2026

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• SF19 loses on time in sudden death tc

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  Difficulty 3/5 1-2 days Newbie friendliness 72/100

  official-stockfish/Stockfish#7206 · 3 comments · Opened Oct 2, 2026

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• Pagination shows an ellipsis that hides no page on lists of 4 or 5 pages

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  Difficulty 2/5 1-3 hours Newbie friendliness 91/100

  official-stockfish/fishtest#2608 · Opened Sep 26, 2026

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• Possible ponder issue on MacOS?

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  Difficulty 4/5 3-5 days Newbie friendliness 42/100

  official-stockfish/Stockfish#7184 · Opened Sep 20, 2026

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• fish.exit stops the worker mid-task, discarding in-flight games

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  Difficulty 3/5 1-2 days Newbie friendliness 55/100

  official-stockfish/fishtest#2597 · 5 comments · Opened Sep 16, 2026

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• No option to force specific architecture when running a universal build

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  Difficulty 5/5 Over a week Newbie friendliness 42/100

  official-stockfish/Stockfish#7145 · 8 comments · Opened Sep 9, 2026

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• Parse /api/finished_runs UNIX timestamps explicitly as UTC

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  Difficulty 2/5 1-3 hours Newbie friendliness 86/100

  official-stockfish/fishtest#2592 · Opened Sep 8, 2026

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• Server tests fail on Windows because libmagic reports application/x-gzip

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  Difficulty 2/5 1-3 hours Newbie friendliness 72/100

  official-stockfish/fishtest#2591 · 3 comments · Opened Sep 8, 2026

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• Very Sub Optimal Mating

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  official-stockfish/Stockfish#7128 · 1 comment · Opened Sep 2, 2026

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• Overzealous auto purging

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  Difficulty 4/5 3-5 days Newbie friendliness 45/100

  official-stockfish/fishtest#2582 · 1 comment · Opened Aug 15, 2026

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• Suggestion: expected number of games remaining metric

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  official-stockfish/fishtest#2580 · Opened Aug 7, 2026

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• Sometimes it's impossible to see what is the actual code change in an attempted patch.

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  Difficulty 3/5 1-2 days Newbie friendliness 52/100

  official-stockfish/fishtest#2573 · 1 comment · Opened Jul 10, 2026

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• Record an action entry when rejecting users

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  Difficulty 2/5 1-3 hours Newbie friendliness 74/100

  official-stockfish/fishtest#2568 · 3 comments · Opened Jul 3, 2026

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• chi2 code/runs analysis

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  official-stockfish/fishtest#2555 · 1 reaction · Opened Jun 6, 2026

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• Time losses at CCC

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  Difficulty 4/5 3-5 days Newbie friendliness 38/100

  official-stockfish/Stockfish#6864 · 3 comments · Opened May 29, 2026

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• Just out of curiosity,how can i learn nnue more so that i could improve deep learning skills as a cs graduate student

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  Difficulty 5/5 Over a week Newbie friendliness 15/100

  official-stockfish/nnue-pytorch#433 · 1 comment · Opened Mar 10, 2026

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• Different 'diff' links in test form and overview affecting repo comments

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  gui server

  Difficulty 3/5 1-2 days Newbie friendliness 42/100

  official-stockfish/fishtest#2494 · 2 comments · Opened Mar 8, 2026

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• [Feature Request] Improve worker architecture detection and affinity for Intel Hybrid (P/E core) CPUs

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  enhancement worker update

  Difficulty 5/5 Over a week Newbie friendliness 35/100

  official-stockfish/fishtest#2450 · 10 comments · 2 reactions · Opened Jan 22, 2026

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• Is it possible to train Stockfish to try to *lose* a standard chess game instead of trying to win?

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  Difficulty 5/5 Over a week Newbie friendliness 20/100

  official-stockfish/nnue-pytorch#385 · 5 comments · Opened Jan 14, 2026

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• Wrong evaluation for wrong color bishop.

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  Difficulty 4/5 3-5 days Newbie friendliness 52/100

  official-stockfish/Stockfish#6481 · 12 comments · Opened Dec 17, 2025

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• [RFC] A Scheduler for Multi-Take Tests to Improve Efficiency

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  official-stockfish/fishtest#2409 · 2 reactions · Opened Nov 9, 2025

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• Fishtest on AWS EC2

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  Difficulty 4/5 3-5 days Newbie friendliness 30/100

  official-stockfish/fishtest#2406 · 4 comments · Opened Oct 21, 2025

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• Stockfish with UCI_LimitStrength can't checkmate RK vs K

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  Difficulty 4/5 3-5 days Newbie friendliness 48/100

  official-stockfish/Stockfish#6356 · 13 comments · Opened Oct 13, 2025

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• fishtest won't work

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  official-stockfish/fishtest#2367 · 6 comments · Opened Aug 7, 2025

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• Unable to access developer repository, Unprocessable Entity for url

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  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  official-stockfish/fishtest#2323 · 4 comments · Opened Jun 22, 2025

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• Optional Multithreaded Test Eligibility per Worker

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  official-stockfish/fishtest#2283 · 1 comment · Opened Apr 14, 2025

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• Quality of life improvements to ensure correct bounds

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  official-stockfish/fishtest#2279 · Opened Mar 29, 2025

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• Uncaught javascript error and blank screen.

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  Difficulty 3/5 1-2 days Newbie friendliness 35/100

  official-stockfish/fishtest#2168 · 3 comments · 1 reaction · Opened Jan 12, 2025

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• Fishtest displays memory and config file error after using Lenovo Vantage memory cleanup; restart already tried

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/fishtest#2153 · 20 comments · Opened Dec 20, 2024

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• Make Python 3.9 the minimal required Python version for the worker?

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  update worker update

  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/fishtest#2143 · 37 comments · Opened Dec 11, 2024

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• Serializing throwing an exception

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/nnue-pytorch#291 · 2 comments · Opened Dec 3, 2024

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• Option to enable AVX-512

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  official-stockfish/fishtest#2141 · Opened Nov 16, 2024

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• Type annotations in Fishtest

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  official-stockfish/fishtest#2140 · 8 comments · Opened Nov 9, 2024

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• Label of train set

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/nnue-pytorch#288 · Opened Sep 20, 2024

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• Add normalized game pair Elo to stats

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  Difficulty 5/5 Over a week Newbie friendliness 35/100

  official-stockfish/fishtest#2134 · 5 comments · Opened Sep 6, 2024

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• Use Fast 2SPSA algorithm

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  official-stockfish/fishtest#2126 · 1 comment · 1 reaction · Opened Aug 3, 2024

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• Early stopping

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  Difficulty 5/5 Over a week Newbie friendliness 25/100

  official-stockfish/fishtest#2125 · 10 comments · 2 reactions · Opened Aug 1, 2024

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• Notify also when followed tests gets approved

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  Difficulty 5/5 Over a week Newbie friendliness 20/100

  official-stockfish/fishtest#2124 · 10 comments · Opened Jul 28, 2024

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• auto-purge weird behavior

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  Difficulty 3/5 1-2 days Newbie friendliness 38/100

  official-stockfish/fishtest#2107 · 4 comments · Opened Jul 6, 2024

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• get_machines is too slow and does not use the book keeping data

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  Difficulty 4/5 3-5 days Newbie friendliness 35/100

  official-stockfish/fishtest#2101 · 30 comments · Opened Jul 3, 2024

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• upload_pgn pserve and primary pserve can hang

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/fishtest#2094 · 15 comments · Opened Jul 2, 2024

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• pserve hangs

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/fishtest#2055 · 3 comments · Opened Jun 7, 2024

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• One worker with strange symptoms

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  Difficulty 4/5 3-5 days Newbie friendliness 25/100

  official-stockfish/fishtest#2051 · 9 comments · Opened Jun 4, 2024

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• Prev pagination button removes additional url parameters

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  Difficulty 2/5 1-3 hours Newbie friendliness 58/100

  official-stockfish/fishtest#2043 · Opened May 29, 2024

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