Nemorino

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Nemorino enjoys the alleged effect of the love potion

Nemorino,
an UCI compliant, free open source chess engine by Christian Günther, also supporting the Chess Engine Communication Protocol, written in C++ and first released in September 2016 under the GPLv3 license. Nemorino's board representation and move structure are taken from Stockfish . Nemorino supports Syzygy Bases based on Basil Falcinelli's Fathom API , applies a very lazy parallel search, and is able to play Chess960.

Etymology

Nemorino is named after the a character of Gaetano Donizetti's comic operaL'elisir d'amore, premiered on May 12, 1832 at the Teatro alla Canobbiana in Milan. Nemorino, a poor peasant, in love with Adina, asks quack doctor Dulcamara for Isolde's love potion, who sells him a bottle of cheap Bordeaux wine instead ...

Features

Board Representation

• Bitboards
• Magic Bitboards
• Copy/Make

Search

• Iterative Deepening with Aspiration Windows
• PVS / Alpha-Beta
• Transposition Table
• Zobrist Hashing
• Lazy SMP
• Selectivity
  • Mate Distance Pruning
  • Null Move Pruning
  • Late Move Reductions
  • Check Extensions
  • Recapture Extensions
  • Futility Pruning
  • Quiescence Search
  • Delta Pruning
  • Static Exchange Evaluation
• Move Ordering
  • Hash Move
  • PV-Move
  • Internal Iterative Deepening
  • Killer Heuristic
  • History Heuristic
  • Followup History Heuristic

Evaluation

• NNUE (Nemorino 6)
• Tapered Eval
• Material
• Mobility
• King Safety
• Pawn Structure
• Endgame Knowledge

Misc

• Chess960
• Pondering
• Syzygy Bases

See also

• Fiction
• Nemo
• Peasant
• Tristram

Forum Posts

2016 ...

• Nemorino - new engine by Christian Günther, CCC, September 23, 2016
• Nemorino 2.0 by Christian Günther, CCC, January 16, 2017
• Nemorino 2.0a is available ... by Frank Quisinsky, CCC, March 15, 2017
• Nemorino 3 by Christian Günther, CCC, June 18, 2017
• Re: TCEC 10 by Christian Günther, CCC, October 15, 2017 » TCEC Season 10
• Nemorino 4 by Christian Günther, CCC, December 21, 2017
• Nemorino 5 by Florentino, CCC, July 22, 2018

2020 ...

• Nemorino 6 (NNUE) by Florentino, CCC, September 28, 2020
• Re: will Tcec allow Stockfish with a Leela net to play? by Connor McMonigle, CCC, June 17, 2021 » NNUE

External Links

Chess Engine

• Christian Günther / Nemorino — Bitbucket
• Nemorino in CCRL 40/40

Misc

• L'elisir d'amore from Wikipedia
• Una furtiva lagrima from Wikipedia
• The Searchers - Love potion number 9 (1963), YouTube Video

References

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