Interesting list.Guenther wrote: ↑Tue Dec 22, 2020 1:15 pmCode: Select all

`(CCRL or GURL single core) Rating: Class > 3100 A1 2900-3100 A2 2700-2900 A3 2500-2700 B1 2300-2500 B2`

XB only list - only the engines with at least 'B2' strength (disregarded a few hundreds weaker ones)

(note: to my best knowledge - please report errors for correction in the XB/UCI chronology, if you find some)Code: Select all

`Name Last Release RC Src PL Prot Amateur 2016-10 B2 - C XB Amundsen 2009-04 B2 yes C XB Amy 2004-03 B2 yes C XB Anatoli 2008-04 B1 - Pascal XB Ant (& Gi-Ant) 2010-12 B2 - C++ XB Averno 2005-03 B2 - C++ XB Bearded 2012-03 B2 - XB Betsy 2003-04 B2 - C XB Bringer (Der) 2001-12 B2 - C++ XB Bruja 2010-05 B2 - C++ XB BugChess2 2011-04 A3 - C++ XB Butcher 2012-04 B2 - C XB Caligula# 2019-03 B1 - XB Chezzz 2003-02 B2 - C++ XB Chronos 2010-06 A3 - C++ XB Comet 2005-05 B2 - C XB Crafty 2020-02 A2 yes C XB Cyberpagno 2016-06 B2 - C XB DanChess 2005-02 B1 - C++ XB Darmenios 2010-10 B2 - C++ XB Dimitri 2019-10 B1* - XB Dirty 2018-11 A2* - C++ XB Djinn 2014-04 A3 - C++ XB Dorky 2018-08 B2 - C++ XB Drosophila 2020-03 B2* yes C XB Eeyore 2010-11 B2 - XB ETChess 2008-01 B1 - XB EveAnn 2017-04 B2 - Pascal XB EXchess 2017-02 A2 yes C++ XB Francesca 2020-06 A3* - C XB FrankWalter 2019-05 B2 yes Java XB Ghost 2017-05 B2 - C++ XB Giraffe 2016-11 B2* yes C++ XB Gosu 2006-10 B2 - XB GreenLightChess 2004-03 B1 - C++ XB Gromit3 2002-01 B2 - C++ XB Horizon 2008-02 B2 - C XB JikChess 2015-10 B1 - C++ XB Joker 2007-12 B2 - C XB Jumbo 2019-07 B1* - C++ XB KingOfKings 2004-09 B2 - C++ XB Kiwi 2005-11 B2 yes C++ XB KnightDreamer 2004-07 B2 - XB Matacz 2008-09 B2 - XB Movei 2007-08 B1 - C XB Myrddin 2015-01 B2 - XB nanoSzachy 2015-10 B1 - XB Nebiyu 2020-01 B2* yes C++ XB Nemeton 2019-05 B2* yes Pascal XB Nimzo 1999-11 B1 - XB NoraGrace 2014-11 B1 yes C# XB Olithink 2020-12 A3 yes C XB Petir 2007-09 B1 - XB Phalanx 2016-05 B1* yes C XB pikoSzachy 2015-10 B2 - XB Popochin# 2018-04 B2 - XB Porucnik 2009-01 B2 yes C++ XB Postmodernist 2006-06 B2 - XB ProDeo 2020-11 A3 - XB Prophet 2007-02 B2* yes C XB Prophet3 2019-06 B2* yes C++ XB Pseudo 2005-04 B1 - C XB Quark 2004-07 B2 - C++ XB RattateChess 2010-02 B2 - XB Resp 2010-12 B2 yes C++ XB Rodin 2016-02 B1 - C XB RomiChess 2017-12 B2 - C XB Sage 2008-05 B2 - XB Sloppy# 2010-07 B1 yes C XB SpiderChess 2007-06 B2 - Pascal XB TheCrazyBishop 2004-07 B2 - C++ XB TheKing 2007-10 B1 - C XB Thinker* 2009-03 A2 - C++ XB Thor's Hammer 2010-10 B2 yes C++ XB TJChess 2016-09 B2 - XB Trace# 2006-11 B2 - C XB Typhoon 2008-08 B2 yes C XB Tytan 2007-07 B2 - C++ XB Waxman 2018-01 B2 - C XB WChess 2018-05 B2 - C XB Xpdnt 2009-10 B2 yes C XB Zarkov 2016-06 B1 - C XB`

If we exclude dead engines, defined as 3y without update, we're left with:

- A1: 0 engines
- A2: 2 engines (Crafty, Dirty)
- A3: 3 engines (Franscesca, Olithink, ProDeo)
- B1: 3 engines (Catigula, Dimitri, Jumbo)