Andrew Grant

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Andrew Grant

Andrew Grant,
an American computer science and mathematics major at the University of Maryland, Baltimore County . He is author of the UCI compliant open source chess engine Ethereal, first officially released in June 2016 , and the distributed SPRT testing framework for chess engines, OpenBench . On June 04, 2021, Andrew Grant announced the commercial release of Ethereal 13.00 (NNUE), while the standard version remained available on Github . In 2023 he became team lead of Torch, the Chess.com chess engine.

See also

• Torch
• OpenBench

Publications

• Andrew Grant (2020). Evaluation & Tuning in Chess Engines. pdf

Forum Posts

2016 ...

• Transposition Table replacement schemes by Andrew Grant, CCC, May 05, 2016 » Transposition Table
• Compiling engine for release by Andrew Grant, CCC, May 14, 2016
• A question about Outpost Knights / Bishops by Andrew Grant, CCC, May 15, 2016 » Outposts
• Time controls for testing for 40/4 by Andrew Grant, CCC, June 03, 2016
• Aspiration Windows on the root search -- Determining margin by Andrew Grant, CCC, June 08, 2016 » Aspiration Windows
• Calculating R value for Null Move by Andrew Grant, CCC, June 23, 2016 » Null Move Pruning, Depth Reduction R
• Transposition Table - Updating entries by Andrew Grant, CCC, June 24, 2016
• Ethereal - Official Release by Andrew Grant, CCC, June 25, 2016
• Testing using many computers and architectures by Andrew Grant, CCC, September 14, 2016 » Engine Testing
• SPRT when not used for self testing by Andrew Grant, CCC, October 21, 2016
• A question about SPRT by Andrew Grant, CCC, December 25, 2016 » SPRT

2017

• Enpass + Castling for Zorbist hashes by Andrew Grant, CCC, January 06, 2017 » Castling Rights, En passant, Zobrist Hashing
• Testing A against B by playing a pool of others by Andrew Grant, CCC, June 24, 2017 » Match Statistics
• Troubles with Texel Tuning by Andrew Grant, CCC, September 26, 2017 » Texel's Tuning Method
• Tapered Eval between 4 phases by Andrew Grant, CCC, October 16, 2017 » Tapered Eval
• Texel Tuning - Success! by Andrew Grant, CCC, October 24, 2017
• Release of Ethereal 8.60 SMP by Andrew Grant, CCC, December 10, 2017
• Time Managment translating to SMP by Andrew Grant, CCC, December 23, 2017 » Ethereal, Parallel Search, Time Management

2018

• Simple quiet move sorting by Andrew Grant, CCC, January 13, 2018 » Move Ordering
• Official Release of Ethereal9.00 by Andrew Grant, CCC, February 15, 2018
• Yet another Mate scores in TT thread by Andrew Grant, CCC, April 12, 2018 » Checkmate, Score, Transposition Table
• UCI Pondering workaround by Andrew Grant, CCC, July 13, 2018 » Pondering, UCI
• Official Release of Ethereal 10.55 by Andrew Grant, CCC, July 16, 2018
• Re: TCEC should reconsider the ban on Ethereal by Andrew Grant, CCC, July 18, 2018
• Re:Basic automated testing by Andrew Grant, CCC, September 30, 2018 » OpenBench

2019

• Playing transposition table moves in the Quiescence search by Andrew Grant, CCC, January 17, 2019 » Transposition Table
• Re: Hyperthreading on or off by Andrew Grant, CCC, January 20, 2019
• Official Release of Ethereal 11.25 by Andrew Grant, CCC, January 21, 2019
• FRC / Chess960 -- Some Lessons I Learned by Andrew Grant, CCC, June 22, 2019 » Chess960

2020 ...

• Pyrrhic, Fathom for Humanoids by Andrew Grant, CCC, August 16, 2020 » Pyrrhic
• Evaluation & Tuning in Chess Engines by Andrew Grant, CCC, August 24, 2020 » Ethereal
• A Crossroad in Computer Chess; Or Desperate Flailing for Relevance by Andrew Grant, CCC, September 29, 2020
• Final Release of Ethereal, V12.75 by Andrew Grant, CCC, October 09, 2020
• Request for someone to train an NNUE for Ethereal by Andrew Grant, CCC, October 09, 2020 » NNUE
• Ethereal Tuning - Data Dump by Andrew Grant, CCC, October 10, 2020
• You've trained a brilliant NN(UE) King-Piece Network. Now what? by Andrew Grant, CCC, November 19, 2020
• Dispelling the Myth of NNUE with LazySMP: An Analysis by Andrew Grant, CCC, December 30, 2020 » NNUE, Lazy SMP

2021

• Commercial Release of Ethereal 13.00 (NNUE) for AVX2 Systems by Andrew Grant, CCC, June 04, 2021
• I declare that HCE is dead... by Andrew Grant, CCC, June 29, 2021 » HCE, NNUE

2022

• Resolving once in a trillion crashes by Andrew Grant, CCC, January 18, 2022 » Debugging

External Links

• AndyGrant (Andrew Grant) · GitHub
• Ethereal wins TCEC Division 4, Interview with Andrew Grant, Chessdom, April 30, 2018 » TCEC Season 12
• Interview with Ethereal's author Andrew Grant, by Nelson Hernandez (Cato the Younger), August 2018, YouTube Video » TCEC Season 13

References

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