Seer

Home * Engines * Seer

Greek Seer ¹

Seer,
an UCI compliant open source chess engine by Connor McMonigle, written in C++, licensed under the GNU GPL and first released in October 2020. Seer uses a custom NNUE implementation based on 32-bit float weights with training code written in PyTorch and inference code relying on OpenMP SIMD for auto vectorization ¹. Due to PEXT Bitboards, Seer requires BMI2 for a reasonable performance, as well as either SSE, AVX, AVX2 or AVX-512 to calculate the NNUE. More recently, Seer supports ARM NEON via sse2neon ² to run on many Android devices ³.

Features

⁴

Board Representation

• Bitboards
• PEXT Bitboards

Search

• Iterative Deepening
• Aspiration Windows
• Lazy SMP
• Principal Variation Search
• Transposition Table
  • Shared Hash Table
  • Zobrist Hashing
• Move Ordering
  • SEE for Captures
  • Killer Heuristic
  • History Heuristic
  • Counter Moves History
  • Follow Up History
• Selectivity
  • Check Extensions if SEE >= 0
  • Null Move Pruning
  • Late Move Reductions
  • History Leaf Pruning
  • Quiescence Search
  • SEE Pruning

Evaluation

• NNUE

See also

• Oracle
• Prophet
• Minic 3

Forum Posts

2020

• Re: New engine releases 2020 by Connor McMonigle, CCC, October 18, 2020
• Seer by Gerd Isenberg, CCC, October 18, 2020

Re: Seer by Connor McMonigle, CCC, November 02, 2020 » Seer 1.1

Re: Seer by Connor McMonigle, CCC, November 18, 2020 » Seer 1.2

• Re: New engine releases 2020 by Connor McMonigle, CCC, November 02, 2020
• Re: Minic version 3 by Connor McMonigle, CCC, November 03, 2020 » Minic 3 ⁵
• Re: Speculations about NNUE development (was New engine releases 2020) by Connor McMonigle, CCC, November 12, 2020 » Dragon by Komodo Chess, Halogen

Re: Speculations about NNUE development (was New engine releases 2020) by Connor McMonigle, CCC, November 12, 2020

2021 ...

• Seer 2.0.0 by Connor McMonigle, CCC, April 27, 2021

Re: Seer 2.0.0 by Archimedes, CCC, August 06, 2021 » Seer 2.2.0 for Android

Re: Seer 2.0.0 by Connor McMonigle, CCC, April 25, 2022 » Seer 2.5.0

• Re: will Tcec allow Stockfish with a Leela net to play? by Connor McMonigle, CCC, June 17, 2021 » NNUE

External Links

Chess Engine

• GitHub - connormcmonigle/seer-nnue: UCI chess engine using NNUE for position evaluation
• Release seer-v2.5.0 · connormcmonigle/seer-nnue · GitHub

Misc

• seer - Wiktionary
• Seer from Wikipedia
• Hypnotic Brass Ensemble - Seer, Sound Rhythm & Form (2016), YouTube Video

Watch on YouTube

References