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RD2L EU Season 15

Season 15 of the European RD2L (aka Reddit Dota 2 League), a casual Draft League

Median hero picks: 12

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Explain this to me
The page shows a hero's winrates against certain enemies, as well as winrate advantage (difference in winrate compared to overall value). Higher rank and winrate mean opponent is easier for the hero, higher R-Rank means opponent is picked often and is less effective against the hero.
HeroMatchesWinrate
ogre_magiOgre Magi7462.16%
OpponentRankRev-RankWinrateAdvantageMatchesWonLostExpected matchesDeviationPercentage
lichLich100.0028.2490.00%27.84%10915550.00%
silencerSilencer98.8229.4187.50%25.34%8719-1-12.50%
winter_wyvernWinter Wyvern97.6575.2972.22%10.06%1813515316.67%
baneBane96.4730.5985.71%23.55%7615228.57%
miranaMirana95.2950.5977.78%15.62%972900.00%
magnataurMagnus94.1222.35100.00%37.84%4402250.00%
skeleton_kingWraith King92.9458.8272.73%10.57%11839218.18%
tinyTiny91.7631.7683.33%21.17%6515116.67%
axeAxe90.5987.0661.11%-1.05%1811714422.22%
chaos_knightChaos Knight89.4118.82100.00%37.84%330300.00%
morphlingMorphling88.2417.65100.00%37.84%3304-1-33.33%
dark_willowDark Willow87.0651.7671.43%9.27%752700.00%
ursaUrsa85.8852.9471.43%9.27%7526114.29%
earthshakerEarthshaker84.7136.4780.00%17.84%5419-4-80.00%
zuusZeus83.5332.9480.00%17.84%5416-1-20.00%
viperViper82.3535.2980.00%17.84%5413240.00%
witch_doctorWitch Doctor81.1834.1280.00%17.84%5414120.00%
undyingUndying80.0088.2457.14%-5.02%14868642.86%
centaurCentaur Warrunner78.8284.7160.00%-2.16%106412-2-20.00%
necrolyteNecrophos77.6592.9453.85%-8.31%13768538.46%
terrorbladeTerrorblade76.4754.1266.67%4.51%6425116.67%
weaverWeaver75.2994.1250.00%-12.16%12661200.00%
treantTreant Protector74.1240.0075.00%12.84%431400.00%
nyx_assassinNyx Assassin72.9438.8275.00%12.84%4312250.00%
pugnaPugna71.7637.6575.00%12.84%4315-1-25.00%
alchemistAlchemist70.5941.1875.00%12.84%4313125.00%
lunaLuna69.4120.00100.00%37.84%2201150.00%
sniperSniper68.2421.18100.00%37.84%2203-1-50.00%
earth_spiritEarth Spirit67.0623.53100.00%37.84%2201150.00%
arc_wardenArc Warden65.8824.71100.00%37.84%220200.00%
phantom_lancerPhantom Lancer64.7176.4757.14%-5.02%743700.00%
bloodseekerBloodseeker63.5377.6557.14%-5.02%7434342.86%
jakiroJakiro62.3596.4745.45%-16.71%11561019.09%
shredderTimbersaw61.1856.4760.00%-2.16%5322360.00%
linaLina60.0055.2960.00%-2.16%5326-1-20.00%
crystal_maidenCrystal Maiden58.8257.6560.00%-2.16%532500.00%
vengefulspiritVengeful Spirit57.6598.8240.00%-22.16%104612-2-20.00%
juggernautJuggernaut56.4742.3566.67%4.51%3214-1-33.33%
huskarHuskar55.2943.5366.67%4.51%321300.00%
kunkkaKunkka54.1244.7166.67%4.51%3214-1-33.33%
legion_commanderLegion Commander52.9445.8866.67%4.51%3212133.33%
invokerInvoker51.7689.4142.86%-19.30%734700.00%
monkey_kingMonkey King50.5997.6537.50%-24.66%835800.00%
dragon_knightDragon Knight49.4174.1250.00%-12.16%4222250.00%
ember_spiritEmber Spirit48.2472.9450.00%-12.16%4223125.00%
broodmotherBroodmother47.0671.7650.00%-12.16%4222250.00%
phoenixPhoenix45.88100.0033.33%-28.83%936900.00%
disruptorDisruptor44.7116.47100.00%37.84%11001100.00%
lone_druidLone Druid44.7116.47100.00%37.84%11001100.00%
keeper_of_the_lightKeeper of the Light42.3525.88100.00%37.84%110100.00%
wispIo41.1816.47100.00%37.84%11001100.00%
oracleOracle40.0011.76100.00%37.84%110100.00%
clinkzClinkz38.8210.59100.00%37.84%1105-4-400.00%
bounty_hunterBounty Hunter37.659.41100.00%37.84%11001100.00%
enchantressEnchantress36.478.24100.00%37.84%110100.00%
life_stealerLifestealer35.297.06100.00%37.84%1102-1-100.00%
furionNature's Prophet34.125.88100.00%37.84%11001100.00%
nevermoreShadow Fiend34.125.88100.00%37.84%11001100.00%
lionLion31.763.53100.00%37.84%1103-2-200.00%
queenofpainQueen of Pain30.592.35100.00%37.84%11001100.00%
pudgePudge29.411.18100.00%37.84%110100.00%
phantom_assassinPhantom Assassin28.2412.94100.00%37.84%1103-2-200.00%
venomancerVenomancer27.0627.06100.00%37.84%1102-1-100.00%
windrunnerWindranger25.8885.8840.00%-22.16%5234120.00%
drow_rangerDrow Ranger24.7195.2933.33%-28.83%6244233.33%
templar_assassinTemplar Assassin23.5349.4150.00%-12.16%2113-1-50.00%
shadow_demonShadow Demon22.3548.2450.00%-12.16%2111150.00%
meepoMeepo21.1847.0650.00%-12.16%211200.00%
dazzleDazzle20.0083.5333.33%-28.83%3121266.67%
ancient_apparitionAncient Apparition18.8281.1833.33%-28.83%3122133.33%
storm_spiritStorm Spirit17.6582.3533.33%-28.83%3124-1-33.33%
shadow_shamanShadow Shaman16.4781.1833.33%-28.83%3122133.33%
warlockWarlock15.2978.8233.33%-28.83%312300.00%
spirit_breakerSpirit Breaker14.1263.530.00%-62.16%1013-2-200.00%
abyssal_underlordUnderlord12.9491.760.00%-62.16%2021150.00%
troll_warlordTroll Warlord11.7670.590.00%-62.16%101100.00%
rikiRiki11.7670.590.00%-62.16%101100.00%
tinkerTinker9.4161.180.00%-62.16%1013-2-200.00%
skywrath_mageSkywrath Mage8.2470.590.00%-62.16%101100.00%
visageVisage8.2462.350.00%-62.16%101100.00%
faceless_voidFaceless Void5.8890.590.00%-62.16%202200.00%
naga_sirenNaga Siren4.7164.710.00%-62.16%10101100.00%
rubickRubick3.5370.590.00%-62.16%101100.00%
night_stalkerNight Stalker3.5370.590.00%-62.16%101100.00%
antimageAnti-Mage1.1860.000.00%-62.16%1012-1-100.00%