[{"data":1,"prerenderedAt":388},["ShallowReactive",2],{"bot-rosen":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":30,"meta":31,"name":32,"occupation":33,"openingAxes":34,"openingsAnalysis":37,"playstyle":215,"playstyleSummary":219,"ratingHistory":220,"shortName":352,"similar":353,"stem":385,"trophyQuirk":30,"trophyUnlock":30,"whoShouldPlay":386,"__hash__":387},"bots/bots/rosen.json","IM Eric Rosen is a 32-year-old International Master and chess educator from the USA, playing on Chessiverse at an estimated 2357 Elo, firmly in candidate master to expert territory. IMRosen approaches each game as both lesson and story, mixing solid principles with playful traps and instructive commentary. His preparation shows in his repertoire: with White he leans heavily on the [London System](/resources/openings/london-system), a setup he has played across hundreds of games, supported by the Closed Sicilian against 1...c5 and the occasional Scotch Game. With Black he trusts the famously solid Petrov Defense. His calculation is accurate, his opening prep runs deep, and he reliably punishes the kinds of mistakes club players make, all while keeping the tone of a patient teacher rather than a bully. Opponents should expect a calm, principled game that quietly builds pressure until one careless move turns the position into a tactical lesson.","32","rosen","USA","us","4fc217dbd7799d1ac0aee86567531fe493677e429218519fa527d093593f952b","2026-07-06",2357,"json",[15,18,21],{"question":16,"answer":17},"What rating is IMRosen?","IMRosen plays at an estimated 2357 Elo on Chessiverse, which is candidate master to expert strength. At this level he calculates accurately, knows his openings deeply, and punishes most mistakes that club-level opponents make.",{"question":19,"answer":20},"What opening does IMRosen play?","With White, his main weapon is the [London System](/resources/openings/london-system), played in hundreds of his games, with the [Closed Sicilian](/resources/openings/closed-sicilian) as his answer to the Sicilian. With Black he relies on the solid Petrov Defense against 1.e4.",{"question":22,"answer":23},"How do strong club players prepare to face IMRosen?","Study the typical London System plans, especially White's knight landing on e5 and the slow kingside buildup, and have a concrete counter ready before move ten. Against his Petrov, avoid the drawish main lines only if a sharper alternative is genuinely prepared, because his accuracy at 2357 punishes half-remembered theory. Above all, resist releasing the tension early, since he thrives in positions where pieces stay on the board.","Oh no my...","Male","Okay, hello there, welcome. I like to think out loud here, so if a move looks a little tricky and trappy, we can figure it out together. Does this work? If takes, then... well, let's find out. Ooookay, here we go!","International Master Eric Rosen guides viewers through calm, thoughtful journeys across the chessboard. Mixing solid principles with playful traps, light metaphors, and instructive insights. With his signature style of quiet curiosity, he turns every game into both a lesson and a story worth following.",false,"2026-05-07T09:06:00.000Z",null,{},"IM Eric Rosen","IM & Chess Educator",{"solid_sharp":35,"unprepared_theoretical":36},-0.85,-0.04500000000000004,{"stats":38,"whiteFingerprint":55,"blackFingerprint":180},{"total":39,"white":44,"black":50},{"games":40,"uniqueOpenings":41,"sharpness":35,"repertoireNarrowness":42,"theoryAdherence":43},1975,145,-0.66,0.57,{"games":45,"uniqueOpenings":46,"sharpness":47,"repertoireNarrowness":48,"theoryAdherence":49},995,98,-0.71,-0.45,0.79,{"games":51,"uniqueOpenings":46,"sharpness":52,"repertoireNarrowness":53,"theoryAdherence":54},980,-1,-0.87,0.36,{"firstMove":56},[57,88],{"name":58,"percent":59,"count":60,"lines":61,"responses":63},"d4",49.3,723,[62],[58],[64,77],{"name":65,"percent":66,"count":67,"lines":68,"variationBreakdown":70},"d5",33.5,176,[69],[58,65],[71],{"name":72,"percent":73,"count":67,"lines":74},"London System",100,[75],[58,65,76],"Bf4",{"name":78,"percent":79,"count":80,"lines":81,"variationBreakdown":83},"Nf6",66.5,349,[82],[58,78],[84],{"name":72,"percent":85,"count":80,"lines":86},96.7,[87],[58,78,76],{"name":89,"percent":90,"count":91,"lines":92,"responses":94},"e4",45.4,665,[93],[89],[95,124,138,159],{"name":96,"percent":97,"count":98,"lines":99,"variationBreakdown":101},"e5",30.6,81,[100],[89,96],[102,110,117],{"name":103,"percent":104,"count":105,"lines":106},"Scotch Game",35.5,38,[107],[89,96,108,109,58],"Nf3","Nc6",{"name":111,"percent":112,"count":113,"lines":114},"Ponziani",21.5,23,[115],[89,96,108,109,116],"c3",{"name":118,"percent":119,"count":120,"lines":121},"Italian Game",18.7,20,[122],[89,96,108,109,123],"Bc4",{"name":125,"percent":126,"count":127,"lines":128,"variationBreakdown":131},"Sicilian",54.3,144,[129],[89,130],"c5",[132],{"name":133,"percent":134,"count":127,"lines":135},"Closed Sicilian",73.8,[136],[89,130,137],"Nc3",{"name":139,"percent":140,"count":141,"lines":142,"variationBreakdown":145},"French",3.8,10,[143],[89,144],"e6",[146,152],{"name":147,"percent":148,"count":149,"lines":150},"Advance French",60,6,[151],[89,144,58,65,96],{"name":153,"percent":154,"count":155,"lines":156},"Tarrasch French",40,4,[157],[89,144,58,65,158],"Nd2",{"name":160,"percent":161,"count":162,"lines":163,"variationBreakdown":166},"Caro-Kann",11.3,30,[164],[89,165],"c6",[167,173],{"name":168,"percent":169,"count":170,"lines":171},"Classical Caro-Kann",53.3,16,[172],[89,165,58,65,137],{"name":174,"percent":175,"count":176,"lines":177},"Exchange Caro-Kann",46.7,14,[178],[89,165,58,65,179],"exd5",{"vsFirstMove":181},[182,198],{"name":89,"lines":183,"responses":185},[184],[89],[186],{"name":187,"percent":188,"count":189,"lines":190,"variationBreakdown":192},"1...e5 (Open Games)",68.5,481,[191],[89,96],[193],{"name":194,"percent":195,"count":80,"lines":196},"Petrov Defense",67,[197],[89,96,108,78],{"name":58,"lines":199,"responses":201},[200],[58],[202],{"name":203,"percent":204,"count":205,"lines":206,"variationBreakdown":208},"1...d5 systems",76.6,311,[207],[58,65],[209],{"name":210,"percent":204,"count":211,"lines":212},"QGD",128,[213],[58,65,214,144],"c4",{"defensive_aggressive":216,"simplifying_complicating":217,"category":218},0.27,0.97,5,"IMRosen plays remarkably solid chess, choosing sound structures over sharp gambles, yet he almost never trades down to a dry position. He keeps tension on the board as long as possible, maneuvering patiently with a slight aggressive lean, waiting for the moment a trap springs. His repertoire mixes reliable systems like the [London System](/resources/openings/london-system) with the rock-solid [Petrov Defense](/resources/openings/petrov-defense), favoring practical soundness over dense mainline theory.",[221,224,227,230,233,235,238,241,244,246,249,252,255,258,261,264,267,270,272,275,277,280,282,285,287,290,293,296,299,302,304,307,310,313,315,318,320,322,324,326,328,330,333,336,338,340,343,345,348,350],{"rating":222,"msSinceEpoch":223},2092,1779038358506,{"rating":225,"msSinceEpoch":226},2097,1779038432601,{"rating":228,"msSinceEpoch":229},2101,1779038510064,{"rating":231,"msSinceEpoch":232},2088,1779040551276,{"rating":225,"msSinceEpoch":234},1779040824078,{"rating":236,"msSinceEpoch":237},2104,1779042606985,{"rating":239,"msSinceEpoch":240},2096,1779042611627,{"rating":242,"msSinceEpoch":243},2119,1779044791615,{"rating":242,"msSinceEpoch":245},1779044923475,{"rating":247,"msSinceEpoch":248},2111,1779045534293,{"rating":250,"msSinceEpoch":251},2133,1779048118090,{"rating":253,"msSinceEpoch":254},2125,1779048691562,{"rating":256,"msSinceEpoch":257},2118,1779049181529,{"rating":259,"msSinceEpoch":260},2120,1779061070248,{"rating":262,"msSinceEpoch":263},2122,1779061201524,{"rating":265,"msSinceEpoch":266},2124,1779061300574,{"rating":268,"msSinceEpoch":269},2126,1779063158371,{"rating":256,"msSinceEpoch":271},1779075118299,{"rating":273,"msSinceEpoch":274},2108,1779093447785,{"rating":273,"msSinceEpoch":276},1779096168998,{"rating":278,"msSinceEpoch":279},2109,1779096393552,{"rating":278,"msSinceEpoch":281},1779100977970,{"rating":283,"msSinceEpoch":284},2117,1779118176379,{"rating":239,"msSinceEpoch":286},1779126378074,{"rating":288,"msSinceEpoch":289},2100,1779126815242,{"rating":291,"msSinceEpoch":292},2107,1779134321184,{"rating":294,"msSinceEpoch":295},2086,1779159303566,{"rating":297,"msSinceEpoch":298},2080,1779162230912,{"rating":300,"msSinceEpoch":301},2089,1779165334839,{"rating":297,"msSinceEpoch":303},1779191824293,{"rating":305,"msSinceEpoch":306},2071,1779230105765,{"rating":308,"msSinceEpoch":309},2062,1779234702056,{"rating":311,"msSinceEpoch":312},2083,1779236129581,{"rating":300,"msSinceEpoch":314},1779238281578,{"rating":316,"msSinceEpoch":317},2085,1779280342160,{"rating":316,"msSinceEpoch":319},1779297342488,{"rating":316,"msSinceEpoch":321},1779297495584,{"rating":316,"msSinceEpoch":323},1779297586415,{"rating":316,"msSinceEpoch":325},1779297641374,{"rating":316,"msSinceEpoch":327},1779297916033,{"rating":273,"msSinceEpoch":329},1779310813500,{"rating":331,"msSinceEpoch":332},2084,1779312063867,{"rating":334,"msSinceEpoch":335},2095,1779313864727,{"rating":231,"msSinceEpoch":337},1779336409956,{"rating":300,"msSinceEpoch":339},1779338195045,{"rating":341,"msSinceEpoch":342},2082,1779342515305,{"rating":311,"msSinceEpoch":344},1779350335560,{"rating":346,"msSinceEpoch":347},2070,1779353907187,{"rating":346,"msSinceEpoch":349},1779366771862,{"rating":300,"msSinceEpoch":351},1779380027524,"IMRosen",{"sameStyle":354,"different":371},[355,361,367],{"botId":356,"name":357,"elo":358,"country":359,"countryCode":360,"category":218},"Rvika","Malik Mateson",2368,"Senegal","sn",{"botId":362,"name":363,"elo":364,"country":365,"countryCode":366,"category":218},"LMUwL","Sveinn Gudmundsson",2370,"Iceland","is",{"botId":368,"name":369,"elo":370,"country":365,"countryCode":366,"category":218},"uBEUR","Jonas Jumpsquare",2373,[372,379],{"botId":373,"name":374,"elo":375,"country":376,"countryCode":377,"category":378},"LXqAZ","Ebenezer Choir",2358,"Ghana","gh",2,{"botId":380,"name":381,"elo":382,"country":383,"countryCode":384,"category":155},"tvgBZ","Pawla Koenig",2359,"Germany","de","bots/rosen","Players rated roughly 1700 to 2300 will get the most from facing IMRosen. His solid, tension-keeping style punishes impatience, so attackers who lash out prematurely learn quickly why restraint matters. He is ideal for club players wanting to practice against London System and Petrov structures, or for anyone who struggles in long maneuvering games where nothing gets traded and every move carries a hidden tactical idea.","rM7VXXhe18n7eFlf5tRra-ndPhJ0yJ69kJLwoUChGbw",1784583546985]