[{"data":1,"prerenderedAt":178},["ShallowReactive",2],{"bot-legend_ulf_andersson":3},{"id":4,"aboutLong":5,"age":6,"botId":7,"country":8,"countryCode":9,"dataHash":10,"dateModified":11,"elo":12,"extension":13,"faq":14,"favoriteQuote":24,"gender":25,"hello":26,"introduction":27,"isTrophy":28,"liveDate":29,"luckyCharm":27,"meta":30,"name":31,"occupation":32,"openingAxes":33,"openingsAnalysis":36,"playstyle":135,"playstyleSummary":139,"ratingHistory":27,"shortName":140,"similar":141,"stem":175,"trophyQuirk":27,"trophyUnlock":27,"whoShouldPlay":176,"__hash__":177},"bots/bots/legend_ulf_andersson.json","Ulf Andersson is a Premium legend bot on Chessiverse, inspired by the Swedish chess figure of the same name, representing the Chess Legend persona rather than the historical player's own games or FIDE record. The bot carries an estimated rating of 3083, placing it at a super-grandmaster, engine-level standard capable of challenging nearly any human opponent. Representing Sweden and modeled at age 75, Andersson's profile favors a curated repertoire built around patient, technical struggles rather than sharp theoretical battles. As black, the bot frequently reaches the [Nimzo-Indian](/resources/openings/nimzo-indian), using the early bishop pin to steer play toward long-term structural pressure. Opponents facing Andersson should expect a grinding, precise game where small advantages are nursed patiently rather than forced, with few tactical shortcuts on offer.","75","legend_ulf_andersson","Sweden","se","822c4cc8bc7dd26e157b5f0e204fe532230f038d1c7a537cf654909626cb0789","2026-10-05",3083,"json",[15,18,21],{"question":16,"answer":17},"What rating is Andersson?","Andersson carries an estimated Chessiverse rating of 3083, placing it at super-grandmaster, engine-tier strength. This rating reflects the bot's curated play style on Chessiverse, not any historical FIDE rating of the real chess figure who inspired it.",{"question":19,"answer":20},"What opening does Andersson play?","As black, Andersson most often reaches the [Nimzo-Indian](/resources/openings/nimzo-indian) and the [Taimanov](/resources/openings/taimanov), both chosen for their flexible, structurally rich positions. These choices match the bot's preference for quiet maneuvering over sharp theoretical fights.",{"question":22,"answer":23},"Can master-level players beat Andersson?","It is possible but difficult, since a 3083 rating puts Andersson well above typical master-level strength. Masters will need to avoid early simplification and find ways to generate imbalances, as Andersson excels at trading down into favorable, technically precise endgames.","","male","Hello, I am Andersson. I enjoy a quiet position, a small edge, and the patience to see it through to the end. Shall we play?",null,false,"2026-10-04T14:48:15.062Z",{},"Ulf Andersson","Chess Legend",{"solid_sharp":34,"unprepared_theoretical":35},0.04,-0.255,{"stats":37,"whiteFingerprint":53,"blackFingerprint":63},{"total":38,"white":43,"black":48},{"games":39,"uniqueOpenings":40,"sharpness":34,"repertoireNarrowness":41,"theoryAdherence":42},2925,420,-1,0.49,{"games":44,"uniqueOpenings":45,"sharpness":46,"repertoireNarrowness":41,"theoryAdherence":47},1480,269,0,0.3,{"games":49,"uniqueOpenings":50,"sharpness":51,"repertoireNarrowness":41,"theoryAdherence":52},1445,283,0.07,0.68,{"firstMove":54},[55],{"name":56,"percent":57,"count":58,"lines":59,"responses":62},"Reti Opening",64.7,1243,[60],[61],"Nf3",[],{"vsFirstMove":64},[65,98],{"name":66,"lines":67,"responses":69},"e4",[68],[66],[70],{"name":71,"percent":72,"count":73,"lines":74,"variationBreakdown":77},"Sicilian",67.2,464,[75],[66,76],"c5",[78,89],{"name":79,"percent":80,"count":81,"lines":82},"Taimanov",34.6,109,[83],[66,76,61,84,85,86,87,88],"e6","d4","cxd4","Nxd4","Nc6",{"name":90,"percent":91,"count":92,"lines":93},"Scheveningen",24.9,72,[94],[66,76,61,95,85,86,87,96,97,84],"d6","Nf6","Nc3",{"name":85,"lines":99,"responses":101},[100],[85],[102],{"name":103,"percent":104,"count":105,"lines":106,"variationBreakdown":108},"Indian systems",88.1,504,[107],[85,96],[109,122,128],{"name":110,"percent":111,"count":112,"lines":113,"mainlines":117},"Other ...e6 vs Nf3",29.6,134,[114],[85,96,115,84,61,116],"c4","...",[118,119,120,121],"b6","Bb4","d5","Be7",{"name":123,"percent":124,"count":125,"lines":126},"Nimzo-Indian",26.3,119,[127],[85,96,115,84,97,119],{"name":129,"percent":130,"count":131,"lines":132},"QGD",15,68,[133,134],[85,96,115,84,97,120],[85,96,115,84,61,120],{"defensive_aggressive":136,"simplifying_complicating":137,"category":138},-0.7,-0.95,1,"Andersson's game leans firmly defensive, consolidating positions and waiting for opponents to overextend rather than seeking early confrontation. The bot trades pieces aggressively to simplify, steering toward clean endgames where technique matters more than complications. Its choice between solid and sharp lines sits near neutral, and its openings lean slightly offbeat rather than deep mainline theory, as seen in lines like the [Taimanov](/resources/openings/taimanov). Overall, expect a measured, technically precise opponent.","Andersson",{"sameStyle":142,"different":161},[143,149,155],{"botId":144,"name":145,"elo":146,"country":147,"countryCode":148,"category":138},"legend_leinier_dominguez","Leinier Domínguez",3077,"Cuba","cu",{"botId":150,"name":151,"elo":152,"country":153,"countryCode":154,"category":138},"legend_artur_yusupov","Artur Yusupov",3096,"Germany","de",{"botId":156,"name":157,"elo":158,"country":159,"countryCode":160,"category":138},"legend_yasser_seirawan","Yasser Seirawan",3068,"United States","us",[162,169],{"botId":163,"name":164,"elo":165,"country":166,"countryCode":167,"category":168},"RCQMl","Hana Biisho",3082,"Vietnam","vn",5,{"botId":170,"name":171,"elo":165,"country":172,"countryCode":173,"category":174},"xoAct","Ned L. Help","Canada","ca",4,"bots/legend_ulf_andersson","Andersson suits strong club players and advanced competitors, roughly expert level and above, who want to test their endgame technique and patience against a technically precise opponent. Because the bot simplifies quickly and avoids unnecessary complications, players prone to overextending or forcing tactics will learn the value of restraint. Those looking for sharp, chaotic battles may find this matchup instructive but unfamiliar, since Andersson prefers to win through accumulated small advantages rather than direct confrontation.","u_FrLzxkxbB1N9oIgSgndzG0EzsXXwfV7xZAgeM40sA",1791222022927]