Skip to main Communities My dashboard Log in Sign up Lichess Published April 16, 2026 | Version 2026.04.16 Dataset Open lichess-org/chess-openings: 2026.04.16 - Initial Release Authors/Creators Lichess Contributors Description First release of the chess openings dataset repo, for archival purposes and to facilitate versioning for the mobile app. What's Changed Making the file legal Json by @rpdelaney in https://github.com/lichess-org/chess-openings/pull/2 Proper names for players, who have non-ASCII characters in their names by @hauva69 in https://github.com/lichess-org/chess-openings/pull/3 Added human-readable, corrected list of ECO codes. by @louchesprocket in https://github.com/lichess-org/chess-openings/pull/6 Change formatting for Accepted and Declined gambits by @ChameleonTartu in https://github.com/lichess-org/chess-openings/pull/10 Fix various inconsistencies in names by @Rested in https://github.com/lichess-org/chess-openings/pull/11 Improvements to Kieseritzky Gambit by @fynsta in https://github.com/lichess-org/chess-openings/pull/13 Update a.tsv by @fynsta in https://github.com/lichess-org/chess-openings/pull/15 Modern Variations Cleanup by @fynsta in https://github.com/lichess-org/chess-openings/pull/17 Fix Caro-Kann Defense: Labahn Attack by @fynsta in https://github.com/lichess-org/chess-openings/pull/18 Some improvements by @fynsta in https://github.com/lichess-org/chess-openings/pull/19 Remove more inconsistencies by @fynsta in https://github.com/lichess-org/chess-openings/pull/20 Indian Game -> Indian Defense by @fynsta in https://github.com/lichess-org/chess-openings/pull/22 Fix Taimanov by @fynsta in https://github.com/lichess-org/chess-openings/pull/23 Correct Rhamphorhynchus spelling by @fynsta in https://github.com/lichess-org/chess-openings/pull/24 C41 Philidor Defense: Alapin-Blackburne gambit -> Albin-Blackburne by @benediktwerner in https://github.com/lichess-org/chess-openings/pull/25 Add JSON exporter by @pierotofy in https://github.com/lichess-org/chess-openings/pull/29 Change some commas to colons / make Nimzo-Larsen naming consistent by @dtpc in https://github.com/lichess-org/chess-openings/pull/33 add caro kann apocalypse attack by @cmgchess in https://github.com/lichess-org/chess-openings/pull/36 added Caro Kann : Campomanes Attack by @cmgchess in https://github.com/lichess-org/chess-openings/pull/37 added saemish gambit by @cmgchess in https://github.com/lichess-org/chess-openings/pull/38 Correct Vienna Gambit to have C29 by @benediktwerner in https://github.com/lichess-org/chess-openings/pull/39 remove independent C44: tayler opening by @cmgchess in https://github.com/lichess-org/chess-openings/pull/40 Some Nimzowitsch Defense fixes by @fynsta in https://github.com/lichess-org/chess-openings/pull/41 Add missing "Accepted" by @fynsta in https://github.com/lichess-org/chess-openings/pull/42 Change ECO A41 King's Pawn Game: Maróczy Defense to B07 by @cmgchess in https://github.com/lichess-org/chess-openings/pull/44 kid fianchetto benjamin defense A49->E61 by @cmgchess in https://github.com/lichess-org/chess-openings/pull/45 A10->E61 kid semi classical exchange + A80->D00 blackmar-diemer netherlands by @cmgchess in https://github.com/lichess-org/chess-openings/pull/47 Fixes #46 by @fynsta in https://github.com/lichess-org/chess-openings/pull/48 More fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/49 zukertort reversed mexican A00->A06 by @cmgchess in https://github.com/lichess-org/chess-openings/pull/50 more fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/51 Van Geet: Nowokunski confusion by @cmgchess in https://github.com/lichess-org/chess-openings/pull/53 more fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/54 Morphy Gambit: e4 before d4 by @benediktwerner in https://github.com/lichess-org/chess-openings/pull/58 Make Maroczy Defense actually a King's Pawn Game by @benediktwerner in https://github.com/lichess-org/chess-openings/pull/59 Completed changes in accordance with #56 regarding the Giuco Piano. by @hitansh1299 in https://github.com/lichess-org/chess-openings/pull/61 Fix lint for the A and B lists. by @allanjoseph98 in https://github.com/lichess-org/chess-openings/pull/60 Use enumerate by @Masynchin in https://github.com/lichess-org/chess-openings/pull/63 Bastrikov quickfix by @allanjoseph98 in https://github.com/lichess-org/chess-openings/pull/64 Misc move order fixes by @allanjoseph98 in https://github.com/lichess-org/chess-openings/pull/65 De-dup the C,D and E lists. by @allanjoseph98 in https://github.com/lichess-org/chess-openings/pull/67 Delete openings with 0 games played by @allanjoseph98 in https://github.com/lichess-org/chess-openings/pull/69 Misc corrections by @allanjoseph98 in https://github.com/lichess-org/chess-openings/pull/68 Alekhine: Two pawn -> pawns by @benediktwerner in https://github.com/lichess-org/chess-openings/pull/70 Added Italian Game: Paris Defence by @sgen in https://github.com/lichess-org/chess-openings/pull/72 Blumenfeld countergambit was announced too early by @rizka10 in https://github.com/lichess-org/chess-openings/pull/73 qpg: Veresov Attack -> Richter-Veresov Attack by @SandroMartens in https://github.com/lichess-org/chess-openings/pull/74 Update d.tsv by @alexandru-duca in https://github.com/lichess-org/chess-openings/pull/75 Blackmar-Diemer Gambit move order by @alexandru-duca in https://github.com/lichess-org/chess-openings/pull/76 Scandinavian Defense: Portuguese Gambit by @alexandru-duca in https://github.com/lichess-org/chess-openings/pull/78 Blackmar-Diemer Gambit Overhaul by @alexandru-duca in https://github.com/lichess-org/chess-openings/pull/79 fix #80 by @cmgchess in https://github.com/lichess-org/chess-openings/pull/81 changed accelerated dragon simagin move order to start with 1.e4 by @cmgchess in https://github.com/lichess-org/chess-openings/pull/82 move order changes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/83 More move order changes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/84 Moscow Variation -> Canal Attack by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/85 Accelerated Fianchetto -> Accelerated Dragon by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/86 Organised some London lines by @SandroMartens in https://github.com/lichess-org/chess-openings/pull/87 Alekhine Defense: Exchange Variation, Voronezh Variation by @xaverh in https://github.com/lichess-org/chess-openings/pull/91 Scandinavian Defense: Valencian Variation by @sergi-nda in https://github.com/lichess-org/chess-openings/pull/93 Added the Dubov Tarrasch by @Zinkelburger in https://github.com/lichess-org/chess-openings/pull/100 +B30 Silician Defense: Portsmouth Gambit by @TheMadSword in https://github.com/lichess-org/chess-openings/pull/102 French Defense: Winawer Variation, Portisch-Hook Variation by @xaverh in https://github.com/lichess-org/chess-openings/pull/103 Indian Defense: Anti-Grünfeld, Basman-Williams Attack by @xaverh in https://github.com/lichess-org/chess-openings/pull/104 King's Gambit Accepted: Wagenbach Defense by @xaverh in https://github.com/lichess-org/chess-openings/pull/105 Sicilian Defense: Smith-Morra Gambit Accepted, Finegold Defense by @xaverh in https://github.com/lichess-org/chess-openings/pull/106 B50 kopec system by @cmgchess in https://github.com/lichess-org/chess-openings/pull/107 Valencian Variation: Add Ilundain Variation by @sergi-nda in https://github.com/lichess-org/chess-openings/pull/113 Valencian Variation: Add Main Line by @sergi-nda in https://github.com/lichess-org/chess-openings/pull/114 d10 slav exchange boor attack by @cmgchess in https://github.com/lichess-org/chess-openings/pull/116 Dutch stonewall vs classical by @SebasF1349 in https://github.com/lichess-org/chess-openings/pull/118 Four Knights Game: Spanish Variation fixes by @SebasF1349 in https://github.com/lichess-org/chess-openings/pull/120 Dutch fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/121 Dutch move order fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/122 Update d.tsv by @sergi-nda in https://github.com/lichess-org/chess-openings/pull/124 Alekhine Defense: Two Pawns Attack, Tate Variation by @xaverh in https://github.com/lichess-org/chess-openings/pull/125 Reversed Grünfeld by @xaverh in https://github.com/lichess-org/chess-openings/pull/126 move order fixes KID fianchetto by @cmgchess in https://github.com/lichess-org/chess-openings/pull/128 Kid fianchetto eco fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/129 Move order fixes by @cmgchess in https://github.com/lichess-org/chess-openings/pull/130 Add E05 line (was mis-classified as E06) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/132 B30 fixes by @jdart1 in https://github.com/lichess-org/chess-openings/pull/133 add A08 line (was mis-classified as A05) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/135 add some Semi-Slav lines to better handle transpositions by @jdart1 in https://github.com/lichess-org/chess-openings/pull/136 add common A90 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/137 add A01 line (can be reached via transposition from 1. c4) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/138 add a B13 line (can be reached by transposition) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/139 add a common C54 line (currently misclassified as C50) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/140 fix classification for Giuoco Piano/Two Knights (C53-C56), add some positions by @jdart1 in https://github.com/lichess-org/chess-openings/pull/141 Add some English Opening lines, to better handle transpositions by @jdart1 in https://github.com/lichess-org/chess-openings/pull/143 add a D85 line (can be reached by transposition) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/145 Fix English Neo-Catalan Move Order by @cristivlas in https://github.com/lichess-org/chess-openings/pull/146 More English Opening Move Order Fixes by @cristivlas in https://github.com/lichess-org/chess-openings/pull/147 relocate A00 Van Geet Opening: Caro-Kann Variation, St. Patrick's Attack to the other Caro-Kann lines by @HaonRekcef in https://github.com/lichess-org/chess-openings/pull/148 Improve Move Orders for Rapport-Jobava London and Chigorin by @HaonRekcef in https://github.com/lichess-org/chess-openings/pull/149 fix move orders with e6 in the London by @HaonRekcef in https://github.com/lichess-org/chess-openings/pull/150 Add a D85 line. Lacking this some D85 are misclassified, e.g. as A34 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/152 E43 fix by @jdart1 in https://github.com/lichess-org/chess-openings/pull/151 Add 'Adhiban Gambit' by @TheForkPower in https://github.com/lichess-org/chess-openings/pull/153 Add ultra-symmetrical English opening Variation by @TheForkPower in https://github.com/lichess-org/chess-openings/pull/154 Additional moves for the "Reversed Grünfeld" by @xaverh in https://github.com/lichess-org/chess-openings/pull/155 Barry Attack proper by @xaverh in https://github.com/lichess-org/chess-openings/pull/158 Additional line for move orders in the Anglo-Grünfeld by @xaverh in https://github.com/lichess-org/chess-openings/pull/159 Quade -> Quaade by @Malorra in https://github.com/lichess-org/chess-openings/pull/161 Additional line for Scotch Game: Lolli Variation by @xaverh in https://github.com/lichess-org/chess-openings/pull/160 C96 Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit by @xaverh in https://github.com/lichess-org/chess-openings/pull/162 Amar Gambit -> Paris Gambit by @Malorra in https://github.com/lichess-org/chess-openings/pull/163 Alien Gambit by @drainwordlee in https://github.com/lichess-org/chess-openings/pull/164 Adding Cologne Gambit and Celadon Variation by @Malorra in https://github.com/lichess-org/chess-openings/pull/165 Adding the Koola-Koola Variation: by @Malorra in https://github.com/lichess-org/chess-openings/pull/166 add B92 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/170 Add Siberian Variation by @Malorra in https://github.com/lichess-org/chess-openings/pull/171 Add Siberian Trap by @Malorra in https://github.com/lichess-org/chess-openings/pull/172 Remove redundant line in Danish Gambit by @Malorra in https://github.com/lichess-org/chess-openings/pull/175 Unify spelling Karlsbad -> Carlsbad by @xaverh in https://github.com/lichess-org/chess-openings/pull/178 add D45 line plus one for D46 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/181 add C54 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/180 add Caro-Kann Endgame Offer & Endgame Variation by @jdart1 in https://github.com/lichess-org/chess-openings/pull/179 Fix https://github.com/lichess-org/lila/issues/15592 by @fynsta in https://github.com/lichess-org/chess-openings/pull/182 Remove unnecessary line by @Malorra in https://github.com/lichess-org/chess-openings/pull/183 Remove redundant line by @Malorra in https://github.com/lichess-org/chess-openings/pull/184 Small improvements by @Malorra in https://github.com/lichess-org/chess-openings/pull/185 add some Ponziani Opening lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/186 fixes for Bogo-Indian + Catalan by @jdart1 in https://github.com/lichess-org/chess-openings/pull/188 add some French Defense Classical/Steinitz lines with early ..a6 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/189 add an A29 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/190 Added an A06 line by @EthanHiser in https://github.com/lichess-org/chess-openings/pull/199 Link to Hugging Face version by @cakiki in https://github.com/lichess-org/chess-openings/pull/201 Sorensen gambit issue #200 by @esmith1092 in https://github.com/lichess-org/chess-openings/pull/202 Update a.tsv by @ryathom57 in https://github.com/lichess-org/chess-openings/pull/203 English Opening fixes by @jdart1 in https://github.com/lichess-org/chess-openings/pull/204 Add Martian Gambit (B18) by @TheForkPower in https://github.com/lichess-org/chess-openings/pull/205 add some transpositions into D46 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/206 add Delayed Alapin Variation by @jdart1 in https://github.com/lichess-org/chess-openings/pull/208 add a transposition into E04 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/209 French Winawer: Poisoned Pawn, Eingorn and Warsaw variations by @seccohazy in https://github.com/lichess-org/chess-openings/pull/211 add a D11 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/212 Four Knights Game: Glek System by @seccohazy in https://github.com/lichess-org/chess-openings/pull/213 Small improvements in the Smith-Morra Gambit by @Malorra in https://github.com/lichess-org/chess-openings/pull/214 Correction for King's Gambit Accepted: Villemson Gambit by @seccohazy in https://github.com/lichess-org/chess-openings/pull/215 Add subvariations to Milner-Barry Gambit and King's Gambit Declined by @seccohazy in https://github.com/lichess-org/chess-openings/pull/216 Move order fixes in the French Defense by @seccohazy in https://github.com/lichess-org/chess-openings/pull/217 Nimzo-Indian Saemisch Variation starts after 4.a3 by @Allirey in https://github.com/lichess-org/chess-openings/pull/218 Corrections and additions in the Nimzo-Indian Defense by @seccohazy in https://github.com/lichess-org/chess-openings/pull/219 Consistency in the Nyezhmetdinov-Rossolimo Attack by @xaverh in https://github.com/lichess-org/chess-openings/pull/220 Guatemala Defense is part of Owen Defense by @Malorra in https://github.com/lichess-org/chess-openings/pull/221 Add Dilworth Gambit by @Zinkelburger in https://github.com/lichess-org/chess-openings/pull/222 Accomdate for move-orders in Semi-Slav defense v Rubinstein System by @xaverh in https://github.com/lichess-org/chess-openings/pull/223 e4 c5 2. Nc3 e6 3. d4 d5 is a French, by @hkopp in https://github.com/lichess-org/chess-openings/pull/225 Add a D24 line (was mis-classified as D37) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/226 add a Worrall Attack line (C86) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/229 Change Gedult Attack, Gedult Attack to Gedult Attack by @tigerros in https://github.com/lichess-org/chess-openings/pull/230 Add French Defense: Hecht-Reefschläger Variation by @seccohazy in https://github.com/lichess-org/chess-openings/pull/231 Nimzo Indian: Modern Variation, Romanishin Gambit by @seccohazy in https://github.com/lichess-org/chess-openings/pull/233 French Defense Classical fixes, add Shirov-Anand Variation by @seccohazy in https://github.com/lichess-org/chess-openings/pull/235 Update a.tsv by @ryathom57 in https://github.com/lichess-org/chess-openings/pull/236 add a C55 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/239 add some A29 lines with .. d6 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/240 add some A65 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/241 E38 + E59 updates by @jdart1 in https://github.com/lichess-org/chess-openings/pull/242 Add some A65 and E81 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/243 B45 fixes by @jdart1 in https://github.com/lichess-org/chess-openings/pull/244 add some A48 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/245 Add a C47 line (can be reached by transposition from Vienna Game) by @jdart1 in https://github.com/lichess-org/chess-openings/pull/246 reclassify/add some C18 and C19 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/247 Add some C54 lines. by @jdart1 in https://github.com/lichess-org/chess-openings/pull/248 fixes for A11/A12/A14 by @jdart1 in https://github.com/lichess-org/chess-openings/pull/250 KID: Fianchetto Variation with Nf3 by @Frederico-Messa in https://github.com/lichess-org/chess-openings/pull/249 add some D45 and D46 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/251 add C13 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/252 Fix French Defense Classical line by @seccohazy in https://github.com/lichess-org/chess-openings/pull/253 Revert "Fix French Defense Classical line" by @niklasf in https://github.com/lichess-org/chess-openings/pull/254 add a A48 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/255 add some C54 ines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/256 Update c.tsv by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/258 add some A37 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/259 Added some B45 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/260 Fix some Polish opening and related lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/261 French Defense: Advance Variation, Kupreichik Variation by @xaverh in https://github.com/lichess-org/chess-openings/pull/263 C18 + C19 fixes by @jdart1 in https://github.com/lichess-org/chess-openings/pull/264 Added endgame variation for Semi-Tarrasch by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/265 add some C19 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/266 Added a C18, C54, and some C65 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/268 add D12 and D15 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/269 Added some A07 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/270 add some A37 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/275 McDonnell Attack, Toilet Variation by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/277 Four Knights Game: Naroditsky Variation by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/276 Sicilian Defense: Closed, Carlsen Variation by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/281 Albin Countergambit, Spassky Variation by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/278 Sicilian Defense: Alapin Variation, Anti-Alapin Gambit by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/282 Réti Opening: Advance Variation, Navara Gambit by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/283 Sicilian Defense: Dragon Variation, Hungarian Dragon by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/284 Add Caro-Kann Defense: Tartakower Variation, Perlis Line by @sergi-nda in https://github.com/lichess-org/chess-openings/pull/273 Sicilian Dragon, Yugoslav Attack, Chinese Dragon by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/285 Snyder Variation -> Czerniak Attack by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/287 Added the Carlsen Variation of the QGD by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/289 Hyperaccelerated Fianchetto -> Hyperaccelerated Dragon by @LesCyclopes in https://github.com/lichess-org/chess-openings/pull/290 Added a C24 line by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/291 Added D36, D53, D41, and D43 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/292 add a C83 line by @jdart1 in https://github.com/lichess-org/chess-openings/pull/293 Added B13 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/294 Added B77 and B78 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/297 c.tsv -- Ruy Lopez Steinitz Defense: transposition from Philidor Defense by @Panthee in https://github.com/lichess-org/chess-openings/pull/298 add some E11 lines by @jdart1 in https://github.com/lichess-org/chess-openings/pull/300 Added E57, E88, E81 and E71 lines by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/304 E81 change by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/308 Explain the filenames convention in README and CONTRIBUTING by @cakiki in https://github.com/lichess-org/chess-openings/pull/310 E14 and related fixes by @jdart1 in https://github.com/lichess-org/chess-openings/pull/311 Added Sicilian defense, Portland attack by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/307 Add B30 anti-Sveshnikov starting position. by @jdart1 in https://github.com/lichess-org/chess-openings/pull/315 Added B07 line by @Chess4757 in https://github.com/lichess-org/chess-openings/pull/316 New Contributors @rpdelaney made their first contribution in https://github.com/lichess-org/chess-openings/pull/2 @hauva69 made their first contribution in https://github.com/lichess-org/chess-openings/pull/3 @louchesprocket made their first contribution in https://github.com/lichess-org/chess-openings/pull/6 @ChameleonTartu made their first contribution in https://github.com/lichess-org/chess-openings/pull/10 @Rested made their first contribution in https://github.com/lichess-org/chess-openings/pull/11 @fynsta made their first contribution in https://github.com/lichess-org/chess-openings/pull/13 @benediktwerner made their first contribution in https://github.com/lichess-org/chess-openings/pull/25 @pierotofy made their first contribution in https://github.com/lichess-org/chess-openings/pull/29 @dtpc made their first contribution in https://github.com/lichess-org/chess-openings/pull/33 @cmgchess made their first contribution in https://github.com/lichess-org/chess-openings/pull/36 @hitansh1299 made their first contribution in https://github.com/lichess-org/chess-openings/pull/61 @allanjoseph98 made their first contribution in https://github.com/lichess-org/chess-openings/pull/60 @Masynchin made their first contribution in 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https://github.com/lichess-org/chess-openings/pull/118 @jdart1 made their first contribution in https://github.com/lichess-org/chess-openings/pull/132 @cristivlas made their first contribution in https://github.com/lichess-org/chess-openings/pull/146 @HaonRekcef made their first contribution in https://github.com/lichess-org/chess-openings/pull/148 @TheForkPower made their first contribution in https://github.com/lichess-org/chess-openings/pull/153 @Malorra made their first contribution in https://github.com/lichess-org/chess-openings/pull/161 @drainwordlee made their first contribution in https://github.com/lichess-org/chess-openings/pull/164 @EthanHiser made their first contribution in https://github.com/lichess-org/chess-openings/pull/199 @cakiki made their first contribution in https://github.com/lichess-org/chess-openings/pull/201 @esmith1092 made their first contribution in https://github.com/lichess-org/chess-openings/pull/202 @ryathom57 made their first contribution in 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