Schooner

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Schooner off Hoek van Holland [1] Schooner,

a Chess Engine Communication Protocol (CECP) compliant chess engine by Dennis Sceviour running under Windows. The hobby project already started in the late 70s [2] and was revived using Magic Bitboards in 2015.

Features#

[7].

Board Representation

• Bitboards
• Fancy Magic Bitboards
• SSE4 Population Count
• Staged Move Generation (Schooner 2)

Search

• Lazy SMP using Threads and Shared Hash Table (Schooner 2)
• Iterative Deepening
• Alpha-Beta
• Principal Variation Search
• Transposition Table
• Floating Reductions, LMR and Pruning [8]
• Internal Iterative Deepening (Hash Refutation) [9]

Evaluation

• Material
• Mobility
• Space [10]
• Pawn Structure

Pawn Hash Table

• King Safety

Misc#

• Pondering
• PolyGlot Book (Schooner 2)

See also#

• Ghost

Forum Posts#

2015#

• Schooner Version 1.4 by Dennis Sceviour, CCC, August 19, 2015
• Hash Refutation by Dennis Sceviour, CCC, August 24, 2015
• Profiling Comparison by Dennis Sceviour, CCC, September 06, 2015

2016 …#

• Schooner Version 1.5 by Dennis Sceviour, CCC, May 11, 2016
• Schooner Version 1.7 by Dennis Sceviour, CCC, April 25, 2017
• Schooner Version 1.8 by Dennis Sceviour, CCC, January 15, 2018
• Schooner 2 by Dennis Sceviour, CCC, October 30, 2018
• Schooner’s Test Positions by Dennis Sceviour, CCC, November 02, 2018
• Schooner Version 2.1 by Dennis Sceviour, CCC, July 03, 2019
• Schooner Version 2.2 Release by Dennis Sceviour, CCC, December 16, 2019

External Links#

Chess Engine#

• Schooner Chess
• GitHub - schooner64-chess/Schooner-Chess: engines and books (1.4.1)
• Schooner at CCRL 40/4

Misc#

• Schooner from Wikipedia
• Schooner (disambiguation) from Wikipedia
• schooner - Wiktionary
• Schooner Olad: first sail of 2013 out of Camden Harbor, YouTube Video

Music: Crosby, Stills & Nash - Wooden Ships

References#

1. ↑ The Eendracht in the North Sea on the way to Rotterdam, Photo taken from Hoek van Holland beach, July 05, 2017 15:07 CEST by Gerd Isenberg, bike tour during WCCC 2017
2. ↑ Features - Schooner Chess
3. ↑ Schooner at CCRL 40/4
4. ↑ The Xiphos Material Evaluator by Dennis Sceviour, CCC, November 05, 2018
5. ↑ Re: Schooner 2 by Dennis Sceviour, CCC, November 02, 2018
6. ↑ Re: Schooner 2 by Dennis Sceviour, CCC, October 31, 2018
7. ↑ Features - Schooner Chess
8. ↑ Floating Move Reduction by Dennis Sceviour, CCC, September 14, 2016
9. ↑ Hash Refutation by Dennis Sceviour, CCC, August 24, 2015
10. ↑ Ee: Calculating space by Dennis Sceviour, CCC, August 09, 2016

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