Coiled

Home * Engines * Coiled



Coiled, an UCI compliant chess engine by Oscar Gavira, written in C, first released in 2013. Coiled 0.6, released in July 2018 is available as 32-bit and 64-bit executable for Windows. Coiled-NNUE 0.7 was released in August 2021 as Open Source licensed under the GPL v3.0, using a Stockfish NNUE network with CFish derived probing code.

=Features=

Board Representation

 * 8x8 Board
 * Simple Move Generation

Search

 * Iterative Deepening
 * Aspiration Windows
 * PVS / Alpha-Beta
 * Repetitions
 * Transposition Table
 * Quiescence Search
 * Selectivity
 * Extensions
 * Check Extensions
 * Passed Pawn to 7th Rank
 * Pruning
 * Futility Pruning
 * Mate Distance Pruning
 * Null Move Pruning (R = 3)
 * Static Exchange Evaluation
 * Reductions
 * Late Move Reductions
 * Razoring
 * Move Ordering
 * Hash Move
 * PV-Move
 * Internal Iterative Deepening
 * MVV/LVA
 * Killer Heuristic
 * History Heuristic

Evaluation

 * NNUE (Coiled-NNUE 0.7)
 * Material
 * Tapered Eval
 * Piece-Square Tables
 * Pawn Structure
 * Pawn Hash Table
 * Backward Pawn
 * Isolated Pawn
 * Doubled Pawn
 * Passed Pawn
 * Unstoppable Passer
 * Hidden Passed Pawn
 * Candidate Passed Pawn
 * Faker
 * Bishop
 * Bishop Pair
 * Mobility
 * Trapped Bishop
 * Square Control
 * Knight
 * Outposts
 * Mobility
 * Trapped Knight
 * Square Control
 * Rook
 * On Open and Semi-Open File
 * Rook on Seventh Rank
 * Mobility
 * Trapped Rook
 * Square Control
 * King Safety
 * Castling Rights
 * Pawn Shield
 * Pawn Storm
 * Attacking King Zone
 * King Tropism
 * Endgame Interior Node Recognizer
 * Insufficient Material
 * KPK
 * KRK
 * KBNK
 * KQK
 * KBBK
 * Gaviota Tablebases

Misc

 * Opening Book (SQLite format)
 * Pondering
 * UCI

=See also=
 * Loop

=Forum Posts=
 * Hispanic chess engines + Winboard Zeta Pack number 18 by Pedro Castro, CCC, August 14, 2013
 * Coiled 0.2b by Oscar Gavira, CCC, July 22, 2014
 * Coiled 0.4 by Oscar Gavira, CCC, September 12, 2016
 * Coiled v.0.5 Release by Oscar Gavira, CCC, July 17, 2018
 * Re: Coiled v.0.5 Release by Oscar Gavira, CCC, July 18, 2018


 * Update: Coiled-NNUE 0.7 by Oscar Gavira, CCC, August 06, 2021

=External Links=

Chess Engine

 * Coiled - Información y descargar. Motor de ajedrez UCI (Spanish)
 * GitHub - Oscar-Gavira/Coiled-NNUE: Motor de ajedrez de protocolo UCI
 * Coiled in CCRL Blitz

Misc

 * Coiled Spring by Pentala Harikrishna, Chess.com, September 12, 2011
 * coiled - Wiktionary
 * coil - Wiktionary
 * Coil from Wikipedia
 * Coiled coil from Wikipedia
 * Coiled coil filament from Wikipedia
 * Coil spring from Wikipedia
 * Electromagnetic coil from Wikipedia
 * Chemical oxygen iodine laser (COIL) from Wikipedia
 * Coiled bodies from Wikipedia
 * Feverkin - Coiled Corner (feat. Bijou), YouTube Video

=References= Up one level