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RD2L EU Season 21

Season 21 of the European RD2L (aka Reddit Dota 2 League), a casual Draft League

Total observer wards destroyed: 3365

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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
drow_rangerDrow Ranger4953.06%
OpponentRankRev-RankWinrateAdvantageMatchesWonLostExpected matchesDeviationPercentage
svenSven100.0029.7685.71%32.65%7615228.57%
winter_wyvernWinter Wyvern98.813.57100.00%46.94%4403125.00%
grimstrokeGrimstroke97.6226.19100.00%46.94%3302133.33%
phoenixPhoenix96.4325.00100.00%46.94%3304-1-33.33%
monkey_kingMonkey King95.2423.81100.00%46.94%3301266.67%
life_stealerLifestealer94.0522.62100.00%46.94%3304-1-33.33%
axeAxe92.8630.9580.00%26.94%5413240.00%
invokerInvoker91.6752.3866.67%13.61%6424233.33%
linaLina90.4854.7666.67%13.61%6425116.67%
windrunnerWindranger89.2952.3866.67%13.61%6424233.33%
slardarSlardar88.1054.7666.67%13.61%6425116.67%
legion_commanderLegion Commander86.9032.1475.00%21.94%4312250.00%
venomancerVenomancer85.7121.43100.00%46.94%220200.00%
arc_wardenArc Warden85.7121.43100.00%46.94%220200.00%
magnataurMagnus83.3319.05100.00%46.94%2203-1-50.00%
alchemistAlchemist82.1417.86100.00%46.94%2201150.00%
clinkzClinkz82.1417.86100.00%46.94%2201150.00%
earthshakerEarthshaker82.1427.38100.00%46.94%2201150.00%
visageVisage82.1417.86100.00%46.94%2201150.00%
jakiroJakiro77.3894.0545.45%-7.61%11567436.36%
marsMars76.1984.5250.00%-3.06%844800.00%
tinyTiny75.0082.1450.00%-3.06%633600.00%
abyssal_underlordUnderlord73.8134.5266.67%13.61%3215-2-66.67%
warlockWarlock72.6233.3366.67%13.61%3212133.33%
death_prophetDeath Prophet71.4340.4866.67%13.61%321300.00%
void_spiritVoid Spirit70.2435.7166.67%13.61%3214-1-33.33%
necrolyteNecrophos69.0536.9066.67%13.61%3212133.33%
vengefulspiritVengeful Spirit67.8638.1066.67%13.61%321300.00%
terrorbladeTerrorblade66.6739.2966.67%13.61%3212133.33%
lichLich65.4885.7142.86%-10.20%7345228.57%
snapfireSnapfire64.2995.2437.50%-15.56%835800.00%
faceless_voidFaceless Void63.1096.4337.50%-15.56%8356225.00%
treantTreant Protector61.9073.8150.00%-3.06%4221375.00%
rattletrapClockwerk60.7175.0050.00%-3.06%4225-1-25.00%
dark_seerDark Seer59.5213.10100.00%46.94%110100.00%
spectreSpectre58.3311.90100.00%46.94%1105-4-400.00%
chenChen57.1410.71100.00%46.94%110100.00%
bounty_hunterBounty Hunter55.959.52100.00%46.94%11001100.00%
undyingUndying54.768.33100.00%46.94%1102-1-100.00%
lunaLuna53.577.14100.00%46.94%11001100.00%
puckPuck52.385.95100.00%46.94%1102-1-100.00%
witch_doctorWitch Doctor51.194.76100.00%46.94%1103-2-200.00%
disruptorDisruptor50.001.19100.00%46.94%110100.00%
pudgePudge48.812.38100.00%46.94%11001100.00%
sand_kingSand King47.6214.29100.00%46.94%1103-2-200.00%
abaddonAbaddon46.4328.57100.00%46.94%110100.00%
rubickRubick45.2483.3340.00%-13.06%523500.00%
juggernautJuggernaut44.0591.6733.33%-19.73%6243350.00%
pugnaPugna42.8692.8633.33%-19.73%6242466.67%
wispIo41.6741.6750.00%-3.06%2111150.00%
ogre_magiOgre Magi40.4850.0050.00%-3.06%2115-3-150.00%
enchantressEnchantress39.2948.8150.00%-3.06%2111150.00%
spirit_breakerSpirit Breaker38.1042.8650.00%-3.06%211200.00%
doom_bringerDoom36.9044.0550.00%-3.06%2113-1-50.00%
bloodseekerBloodseeker35.7146.4350.00%-3.06%211200.00%
morphlingMorphling35.7146.4350.00%-3.06%211200.00%
tinkerTinker33.3348.8150.00%-3.06%2111150.00%
tuskTusk32.1478.5733.33%-19.73%312300.00%
baneBane32.1480.9533.33%-19.73%312300.00%
kunkkaKunkka29.7677.3833.33%-19.73%3121266.67%
antimageAnti-Mage28.5776.1933.33%-19.73%3122133.33%
night_stalkerNight Stalker28.5779.7633.33%-19.73%3122133.33%
phantom_lancerPhantom Lancer26.1998.8116.67%-36.39%6152466.67%
phantom_assassinPhantom Assassin25.0088.100.00%-53.06%2024-2-100.00%
furionNature's Prophet23.8171.430.00%-53.06%1012-1-100.00%
ancient_apparitionAncient Apparition22.6270.240.00%-53.06%101100.00%
batriderBatrider22.6270.240.00%-53.06%101100.00%
crystal_maidenCrystal Maiden20.2467.860.00%-53.06%1012-1-100.00%
pangolierPangolier20.2467.860.00%-53.06%1012-1-100.00%
dark_willowDark Willow17.8697.620.00%-53.06%303300.00%
storm_spiritStorm Spirit16.6764.290.00%-53.06%1012-1-100.00%
oracleOracle15.4859.520.00%-53.06%1013-2-200.00%
shadow_shamanShadow Shaman14.2986.900.00%-53.06%2021150.00%
troll_warlordTroll Warlord13.1057.140.00%-53.06%101100.00%
tidehunterTidehunter13.1057.140.00%-53.06%101100.00%
earth_spiritEarth Spirit10.7159.520.00%-53.06%1013-2-200.00%
ember_spiritEmber Spirit9.5289.290.00%-53.06%2023-1-50.00%
ursaUrsa8.3360.710.00%-53.06%101100.00%
viperViper7.1464.290.00%-53.06%1012-1-100.00%
sniperSniper5.9561.900.00%-53.06%10101100.00%
templar_assassinTemplar Assassin4.7672.620.00%-53.06%101100.00%
beastmasterBeastmaster4.7665.480.00%-53.06%101100.00%
centaurCentaur Warrunner2.38100.000.00%-53.06%6063350.00%
techiesTechies1.1990.480.00%-53.06%2021150.00%