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Enxadrista 1.00 Release - Instructional chess engine
Posted: Sat Mar 17, 2018 3:38 pm
by sedicla
Hello talkchess enxadristas! (enxadrista is portguese translation for chess player).
This is the release 1.0 of a new chess engine I wrote in C#. The intention is to provide documentation in Portuguese of the techniques in the form of comments in the source code ! I am the author of Tucano chess engine.
I used and documented most of techniques: board representation options, alpha/beta search, null move, transposition table, lmr, futility pruning, evaluation terms, etc.
The idea is to provide this material in Portuguese so other brazilian programmers can also build their own engines, since most of the chess programming information is in English. Let's say this is my "return to community initiative"
Enxadrista can be download from
https://github.com/alcides-schulz/Xadrez The binary file is in the "release" section. (Xadrez = Chess)
Enxadrista is very weak, if tested it will probably take the last place in the ratings
I may work on some improvements, but the goal is the documentation. I haven't played against it, but maybe can be a good partner for human players.
Hope it can be useful.
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sat Mar 17, 2018 4:03 pm
by CMCanavessi
Any estimation of its strenght? So i can test it with similar engines.
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sat Mar 17, 2018 4:20 pm
by sedicla
Hey Carlos, it is very weak, I only tested against tcsp and lost badly.
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sat Mar 17, 2018 5:49 pm
by CMCanavessi
Cool, so we know that it's weaker than 1700. I will make a couple of tests.
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sat Mar 17, 2018 10:00 pm
by CMCanavessi
Here's a quick gauntlet I did to estimate the strenght:
Code: Select all
-----------------Enxadrista 1.0 x32-----------------
Enxadrista 1.0 x32 - CeruleanJS 0.1.1 x32 : 1,5/4 1-2-1 (100=) 38% -85
Enxadrista 1.0 x32 - Eden 0.0.13 x32 : 1,5/4 1-2-1 (1=00) 38% -85
Enxadrista 1.0 x32 - Frank 0.58 x32 : 2,5/4 2-1-1 (11=0) 63% +92
Enxadrista 1.0 x32 - KillerQueen 2 beta 3 x32 : 1,0/4 0-2-2 (=0=0) 25% -191
Enxadrista 1.0 x32 - Skaki 1.23 x32 : 3,0/4 3-1-0 (0111) 75% +191
Enxadrista 1.0 x32 - Tikov 0.6.3 Rev 2 x32 : 3,0/4 3-1-0 (1011) 75% +191
Rating is around 1300 elo:
Code: Select all
143 Sabrina 3.1.25 x64 : 1363.7 218 27 36 155 21 17 1976.3 82 75.8
144 Project Invincible 2.10 x32 : 1342.6 242 168 20 54 74 8 879.5 35 30.9
145 T.rex 1.8.5 x32 : 1318.5 92 30 13 49 40 14 1400.8 23 23.0
146 Skaki 1.23 x32 : 1317.8 64 32 13 19 60 20 1236.2 16 16.0
147 KillerQueen 2 beta 3 x32 : 1311.8 64 28 20 16 59 31 1236.6 16 16.0
148 Pierre v1.7 x32 : 1301.6 152 61 18 73 46 12 1335.3 37 36.6
149 Dragontooth 0.2 Bahamut x64 : 1291.0 368 161 24 183 47 7 1401.7 94 71.9
150 Enxadrista 1.0 x32 : 1290.8 24 10 5 9 52 21 1275.1 6 6.0
151 Virutor Chess 1.1.2 x32 : 1290.0 152 52 32 68 45 21 1335.9 37 36.6
152 T.rex 1.9 beta x32 : 1288.2 60 24 20 16 57 33 1234.5 15 15.0
153 CeruleanJS 0.1.1 x32 : 1276.8 64 23 24 17 55 38 1238.7 16 16.0
154 QuteChess 1.0.1t x32 : 1257.3 60 15 33 12 53 55 1236.6 15 15.0
155 Nanook v0.17 x32 : 1257.3 60 15 33 12 53 55 1236.6 15 15.0
156 Toledo Nanochess Jan/11/2010 x32 : 1240.9 242 142 41 59 67 17 885.4 35 30.9
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sat Mar 17, 2018 11:29 pm
by sedicla
Thank you very much Carlos. I appreciated.
If you don't mind, can I update the documentation and include those results?
I can link to your twitch to give the credits, ok?
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sun Mar 18, 2018 1:29 am
by CMCanavessi
sedicla wrote:Thank you very much Carlos. I appreciated.
If you don't mind, can I update the documentation and include those results?
I can link to your twitch to give the credits, ok?
Of course! Feel free to use those results however and wherever you want. Do you want the PGN of all the games? I can upload it.
I did a 2nd gauntlet, this time with 16 opponents ranging from 1200 to 1600 elo, and Enxadrista got around 50% of the points. See below the new rating calculated with all the matches, much more accurate than before:
Code: Select all
-----------------Enxadrista 1.0 x32-----------------
Enxadrista 1.0 x32 - BRAMA 05/12/2004 x32 : 1,0/4 0-2-2 (=0=0) 25% -191
Enxadrista 1.0 x32 - Dragontooth 0.2 Bahamut x64 : 4,0/4 4-0-0 (1111) 100% +1200
Enxadrista 1.0 x32 - Iota 1.0 x32 : 3,5/4 3-0-1 (11=1) 88% +346
Enxadrista 1.0 x32 - Joanna2002 1.06 x32 : 0,5/4 0-3-1 (=000) 13% -330
Enxadrista 1.0 x32 - Nanook v0.17 x32 : 1,5/4 0-1-3 (=0==) 38% -85
Enxadrista 1.0 x32 - Pierre v1.7 x32 : 3,0/4 3-1-0 (1110) 75% +191
Enxadrista 1.0 x32 - Project Invincible 2.10 x32 : 1,5/4 1-2-1 (0=10) 38% -85
Enxadrista 1.0 x32 - QuteChess 1.0.1t x32 : 1,5/4 0-1-3 (===0) 38% -85
Enxadrista 1.0 x32 - Sabrina 3.1.25 x64 : 0,5/4 0-3-1 (0=00) 13% -330
Enxadrista 1.0 x32 - Supra 26.0 Pro x64 : 1,0/4 1-3-0 (0100) 25% -191
Enxadrista 1.0 x32 - T.rex 1.8.5 x32 : 1,0/4 1-3-0 (0100) 25% -191
Enxadrista 1.0 x32 - T.rex 1.9 beta x32 : 2,0/4 2-2-0 (1010) 50% ±0
Enxadrista 1.0 x32 - Talvmenni 0.1 x32 : 1,5/4 1-2-1 (01=0) 38% -85
Enxadrista 1.0 x32 - Toledo Nanochess Jan/11/2010 x32 : 2,5/4 2-1-1 (110=) 63% +92
Enxadrista 1.0 x32 - Usurpator II x32 : 2,5/4 2-1-1 (=011) 63% +92
Enxadrista 1.0 x32 - Virutor Chess 1.1.2 x32 : 2,0/4 2-2-0 (1010) 50% ±0
And my current rating list:
Code: Select all
147 KillerQueen 2 beta 3 x32 : 1307.0 64 28 20 16 59 31 1232.2 16 16.0
148 Pierre v1.7 x32 : 1289.3 156 62 18 76 46 12 1328.3 38 37.6
149 Virutor Chess 1.1.2 x32 : 1283.7 156 54 32 70 45 21 1328.6 38 37.6
150 T.rex 1.9 beta x32 : 1283.6 64 26 20 18 56 31 1233.7 16 16.0
151 CeruleanJS 0.1.1 x32 : 1272.0 64 23 24 17 55 38 1234.4 16 16.0
152 Dragontooth 0.2 Bahamut x64 : 1269.4 372 161 24 187 47 6 1394.9 95 72.9
153 QuteChess 1.0.1t x32 : 1260.5 64 16 36 12 53 56 1235.1 16 16.0
154 Nanook v0.17 x32 : 1260.5 64 16 36 12 53 56 1235.1 16 16.0
155 Enxadrista 1.0 x32 : 1246.6 88 32 20 36 48 23 1263.3 22 22.0
156 Toledo Nanochess Jan/11/2010 x32 : 1229.5 246 143 42 61 67 17 886.8 36 31.8
157 BRAMA 05/12/2004 x32 : 1193.8 160 91 46 23 71 29 874.6 38 37.3
158 Tikov 0.6.3 Rev 2 x32 : 1167.8 64 21 10 33 41 16 1240.9 16 16.0
159 Frank 0.58 x32 : 1112.9 64 11 21 32 34 33 1244.4 16 16.0
160 Iota 1.0 x32 : 1085.8 160 77 44 39 62 28 880.0 38 37.3
161 Talvmenni 0.1 x32 : 1075.2 100 66 28 6 80 28 660.8 25 25.0
162 Usurpator II x32 : 1057.2 160 83 24 53 59 15 881.4 38 37.3
163 Xadreco 5.83 x32 : 1043.8 188 81 23 84 49 12 1013.2 46 45.6
~1250 elo
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sun Mar 18, 2018 3:05 am
by tpoppins
Four games per opponent is too little to give a meaningful estimate of an engine's rating. You could run four such gauntlets and get completely different results every time; it's like throwing dice.
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sun Mar 18, 2018 3:51 am
by CMCanavessi
tpoppins wrote:Four games per opponent is too little to give a meaningful estimate of an engine's rating. You could run four such gauntlets and get completely different results every time; it's like throwing dice.
It won't change much. It could jump to 1300 or go down to 1200, but it's not far off. It was supposed to give us an idea of the playing strenght, not an exact number.
Re: Enxadrista 1.00 Release - Instructional chess engine
Posted: Sun Mar 18, 2018 3:37 pm
by sedicla
Thanks again Carlos, I updated the description in github and included your twitch channel.
I think it is fine to just have an idea of the strength. Enxadrista won't be a competitive engine. I hope it can be a documentation reference for Portuguese speaking programmers.