RecSys Challenge 2019

Welcome ACM RecSys Community! For this year’s challenge from the online travel domain, build a context-aware accommodation recommendation system that utilises live user interactions. The winning teams receive prizes up to 8.000 Euros!

The challenge concluded on 30th of June 2019 - 11:59 PM in the UTC-12:00 time zone.

About the RecSys 2019 Challenge

The goal of the challenge is to use user signals within a session to detect the intent of the user and to update the recommendation of accommodations provided to the user. Given a dataset of the interactions of the users on our website and metadata for the items they interacted with, the participants are tasked with predicting what items have been clicked in the later part of a session.

More about the challenge → Dataset →

Preliminary Leaderboard

Team Final Score
LogicAI 0.685711
Layer 6 AI 0.685497
pvz 0.684071
letoh govatri 0.681915
RosettaAI 0.679933
Jacques Peeters 0.679024
Mustelideos 0.678838
DeepBlueAI 0.678032
Pipes 0.677122
PoliCloud8 0.676554
LonelyMe 0.674355
Pawel Godula 0.671595
s2s1osaka 0.671117
tmp 0.670749
RAPIDS.AI 0.670691
OSI LAB 0.670167
SJ 0.670038
JS 0.669439
jiki 0.669235
Mt.Innovation 0.668602
kh595 0.668408
HKX 0.668372
HYdra 0.668273
TrueY 0.66823
YJ 0.668073
recAI 0.66794
STORMtroopers 0.667559
System_One 0.667303
mlda 0.667223
abm 0.664969
ManoMano.fr 0.664758
KT 0.664582
dio 0.664316
NotMe 0.6642
ml19 0.664026
top-gun 0.663929
momo2mo 0.663783
TeamBuctu 0.662935
zashuna 0.662291
Sui_generis 0.661933
TopK 0.66191
nobody 0.6617
Tomasz Dyczek 0.66014
ProAI 0.659493
TrioVago 0.659407
TeamRecsys2019 0.659312
yingzi_0307 0.659213
wjs 0.658587
whales-on-the-moon 0.657317
100Fight 0.65551
MyAlone 0.655361
DeepPlus 0.65507
now_you_see 0.654928
yucube 0.654696
TriAlbo 0.654652
LH 0.654508
Avito 0.65417
HMU-GR 0.651086
PPF 0.650416
VENHEADS 0.650335
hoogleraar 0.650019
LH <3 0.649841
ptrc19 0.649575
marindb 0.64886
Definitive Turtles 0.648239
test net 0.648237
JKU-Alpha 0.647856
provesuni2 0.64758
CustomerSuccess 0.647488
provesuni1 0.647365
test 0.647242
undermind 0.64666
D2KLAB 0.645705
get rec'd 0.645146
Adonis 0.645146
Amine Aoullay 0.645108
Lukas 0.644918
Kyoto_U_SH 0.644794
andreapoli 0.644744
sfsdfagabadsda 0.644469
sdfasgasgah 0.644469
teamhhh 0.644469
s.baier 0.644238
iSenseRec 0.644133
Throwaway 2 0.643828
clickbait 0.643828
Sergey Shalnov 0.64356
IsRecommenderSystemEntropyReducingMachine? 0.643554
Cho Sung Min 0.643554
JKU-Mindflare 0.643554
CMALAB 0.643554
REVAN 0.643553
Datatonic 0.643553
baseline 0.643553
11 0.643315
AmiamMiammo 0.642715
Andrey Ostapets 0.642351
test2 0.641781
Zinc 0.641493
top 10 saddest anime deaths 0.641493
Stars 0.641493
BosLab 0.641303
copyrightly 0.641238
Yoda 0.640337
sta3 0.639904
CreamTeam 0.638913
Univago 0.638724
Macomole 0.638598
Yoga 0.63711
Let's get it 0.63667
condorello 0.636666
fofowe 0.635597
secchio 0.635567
idk 0.635385
caesar 0.634994
Tasu 0.634772
dcLab 0.633797
xbis 0.633774
Banana 0.63243
xgb_team 0.632388
Bivago 0.631668
ML Final Project 0.630585
test1 0.628806
guggug 0.627202
TSS 0.626555
Totorh 0.626537
Matt/Sadat 0.625658
meliodas 0.625453
cjh 0.625332
googxas 0.625052
Janis 0.624785
POLINKS 0.624004
rec-heads 0.623804
choco choco 0.621218
Simple Recommendation 0.619761
triLC 0.619726
KingKing 0.619189
never_give_up 0.619183
infzero 0.616002
chocobar123 0.615335
It's a new day 0.615312
tempEHV 0.614679
teamme 0.614679
aezakmi 0.614679
MyWay 0.614679
Hotel? 0.614448
DeepRS 0.61412
ex indiciis 0.613663
frat 0.613401
Phoenix 0.610617
PK 0.6094
Try1 0.608624
vidofad 0.608306
DeSI_AI 0.608043
roman 0.606665
Hello world! 0.606337
Top 10 saddest anime songs 0.604765
star1 0.60461
mixawif 0.603932
Moozz 0.603707
FRES 0.602372
gogo 0.601961
allw 0.601261
iza 0.601065
saul 0.599833
caonima 0.599354
TeamBrandeis 0.598245
MtEden 0.596761
Team JI 0.595624
hello_world_rec 0.594168
postBG 0.594094
TreeREC 0.593625
Bes 0.592799
DiaorenZXZ 0.592208
ColeZ 0.592196
caocaocao 0.591758
Data Magician Shadow 0.591584
TreeRecSys 0.591526
tstojan 0.591523
cekahi 0.591235
team_overfit 0.590534
Tree 0.59032
ebjo_hast 0.590203
alex_acm_boost 0.589327
FAKER 0.588052
winner 0.58798
Rec_team 0.5878
recsys_rp_ep 0.585466
recsys_pe 0.585334
zju1 0.58511
PepegaRec 0.585043
zju3 0.584119
sergi.sanchez 0.583863
recsys_rs 0.583105
ability 0.582173
recsys_ep 0.581927
aglooka 0.578779
MY_TEAM2 0.577213
ABetterJI 0.571855
BBetterJI 0.571335
saehyung 0.56936
IBICF 0.568981
Falcon 0.567633
Kaiser Franz 0.566597
team33 0.566121
team333 0.565982
JKU_DELTA_AREFEVA_LESOTA 0.564652
inorecs 0.563151
123 0.562375
PUCIT 0.559208
724 0.557999
08/15 0.545804
TeamSfregi 0.545718
team_12 0.544432
MudNinjas345 0.54442
dsf12314 0.54157
pee 0.541562
Hello_yssnb 0.540992
CCX 0.535685
ANALytics69 0.533993
team name temp 0.532953
TestingWater 0.531199
weii 0.528555
Millionaire 0.528365
Liz 0.527516
lf2 0.52743
teamsss 0.525862
wei 0.523296
Treeeeeee 0.519406
provesandreu 0.518981
Draki 0.518884
zjk 0.515231
404 team 0.515231
BLAIR 0.514257
weiyudang 0.513216
一山一寺一壶酒 0.512179
No one 0.511495
asdasdfa 0.511332
recsys2051@brandeis.edu 0.510699
recsys2054@outlook.com 0.510687
Tikaray 0.510687
yujinli0401@qq.com 0.510235
Jaewon-Minji 0.509269
asdf 0.508821
douniwan567 0.508439
noIinteam 0.508041
recsys2055@outlook.com 0.507598
CRosich 0.50754
FARR 0.507385
mmm 0.507385
TV 0.506325
YIYH 0.506071
paprika 0.506002
Lazy_Easy 0.505904
recsys2053@outlook.com 0.505879
recsys2052@brandeis.edu 0.505731
UB_team1_test 0.503061
49ers_rule 0.502648
cnh 0.502347
recsys2021@protonmail.com 0.502341
whatever 0.50199
asdfasdfasd 0.501183
RoyPower 0.501064
RecSys_Group09 0.500747
3box 0.500621
thales 0.500404
zero_like 0.500404
FC 0.500404
MudNinjas321 0.500404
dmlab(skku) 0.500404
WEL 0.500404
COSI129A 0.500404
wangruoyu 0.500404
MyTeam 0.500404
maria 0.500404
COMPSCI_RP 0.500404
Recommasters 0.500404
TUWRecSys1910 0.500404
Time 0.500404
ET 0.500404
zero like 0.500404
Jonathan Siaut 0.500404
FarAway 0.500404
ariel pink 0.500404
accessai 0.500404
Waad 0.500404
learner 0.500404
hzhu828 0.500404
autohome 0.500404
atsky 0.500404
justHavingFun 0.500404
Team_Kashima 0.500404
jolly 0.500404
wzy 0.500404
recSys 0.500404
JKU_Delta_IbrahimAbouElseoud 0.500404
gogo-polinks 0.500404
TeamKK 0.500288
heiheihei 0.500011
teamssssdddd 0.49967
recsys2022@protonmail.com 0.499642
I Am A Strange Loop 0.499377
SickSys 0.499265
hehehe 0.498679
miandddd 0.498666
Shqipet-TUWien 0.497438
Teamff 0.497059
dmlab 0.496785
smaldata 0.495374
smldata 0.495268
sou_team 0.495152
Teamgg 0.493949
Teamhh 0.493392
LASIGE_30 0.491869
Team123 0.491244
HAL9000 0.49111
test_arjun 0.489262
palwal 0.489108
miyata 0.48739
Latte 0.481106
Team EMM 0.480716
Kram 0.476506
zero 0.475607
asdf125 0.474311
asdf123 0.473102
vn_cappsnu 0.472644
recsys2019mail 0.468499
nghiavn 0.466499
RecSys1 0.460343
DM 0.457484
asdf126 0.455876
team1 0.455535
MudNinjas123 0.452891
tscholly 0.448206
CS_760 0.446811
djlfk 0.443847
tscholly94 0.429533
team_cml 0.429482
Wulkasfinest2 0.428195
WulkasFinest 0.428169
Gogo Gadget Recsys 0.428053
chaehun 0.424905
129A 0.422902
Mad Ninjas 0.419049
mura masa 0.419049
r 0.414141
QC 0.404658
UoA 0.391461
Bulgogi Bibimbap 0.388737
TeamJJ 0.375942
vermouth 0.369803
JKU_DELTA_Oleg 0.368597
MY_TEAM 0.364898
JovanSolo 0.363113
khruangbin 0.352449
teamjack 0.349978
Friday Morning 0.347488
MCKBJW 0.345358
rookie101 0.339878
abcddcba 0.333811
totopampin 0.331644
AirTravel 0.323781
3_idiots 0.323117
qqteam 0.320813
Kmeans 0.319202
daydayup 0.313232
Ay-Yu 0.310163
Jay-G 0.308462
h 0.30536
nanaspark 0.30536
dbmaster 0.300223
asdf124 0.292809
随大佬们 0.290787
Dataholics 0.290451
[UFCG] Você já procurou hotel na Internet? 0.290446
netlab2 0.287926
CCIS Lab 0.287909
Woolf 0.287909
aispeech 0.287909
noone 0.287909
弱雞與廢柴 0.287909
StayPositive 0.287909
RECSYS_PARK 0.287909
cjz 0.287909
ld-team 0.287909
zeroHunger_072 0.287909
Sharknado 0.287909
GH 0.287909
sneakyturtle 0.287909
AlphaQ 0.287909
Se_lo_sapevo 0.287909
looking_for_job 0.287909
Cav. 0.287909
taco 0.287909
minitao 0.287909
Overfiiting 0.287909
tmp test 0.287909
TeamK 0.287909
tantara 0.287909
Recoder 0.287909
Mingi 0.287909
QuadCore 0.287909
SystemError 0.287909
elchudi 0.287909
TriVaGoS 0.287909
Tjena 0.287909
pfc 0.287909
Sharpy 0.287909
cricball 0.287909
Satoru 0.287909
11:10 0.287909
mmmmm 0.287909
travelers 0.287909
Check team 0.287909
Bai 0.287909
DuckDuckMountain 0.287909
sun after rain 0.287909
rebound 0.287909
treska2000 0.287909
Mt.hokuhoku 0.287909
CVTEResearch-DMSR 0.287909
Magikarp 0.287909
MasterAlex 0.287909
DigglyPuff 0.287909
SmallData 0.287909
Dead Poets Society 0.287909
inpefess 0.287909
algur 0.287909
aTeam 0.287909
rrkreco 0.287909
Kais 0.287909
BinaryViking 0.287909
xy 0.287909
Intermidia 0.287909
bojack 0.287909
MountLathos 0.287909
Qifeng Zhou 0.287909
teamTT 0.287909
Polosataya 0.287909
YU 0.287909
letfoolsdie 0.287909
newbie 0.287909
MY_TEAM1 0.287909
never say never 0.287909
Kindofman 0.287909
Overfitting 0.287909
Jonathan and Miguel 0.287909
zalando_reco1 0.287909
bestfitting 0.287909
Peace 0.287909
Kefir 0.287909
Rekko 0.287909
ogavirt 0.287909
sfsdfawerewaf 0.287909
justplay 0.287909
autobahn 0.287909
Big Face Cat 0.287909
soondubujjigae 0.287909
第十四號廢物 0.287909
il_buono 0.287909
Zamkadom 0.287909
tf boy 0.287909
Babylon 0.287909
Walenie 0.287909
Pinta 0.287909
JKU-Gamma 0.287909
Moonshot 0.287909
bk_sun* 0.287909
trialwlys126 0.287909
BK-Sun* 0.287909
trivago 0.287909
Ipsos 0.287909
mhkang 0.287909
RTL 0.287909
GreenHand 0.287909
Team 0.287909
snueth 0.287909
pangtal 0.287909
olx-currywurst 0.287909
sstudy 0.287909
EnsekiTT 0.287909
DataSamurAI 0.287909
blackmidi 0.287909
latent_vec 0.287909
AdaptEd 0.287909
LFUStudents_Clemens_Daniel 0.287909
Amine GHERBI 0.287909
transight_uu 0.287909
Kobe 0.287909
TeamSteak 0.287909
good-enough 0.287909
mm 0.287909
group03 0.287909
Barbunny 0.287909
glor 0.287909
sven 0.287909
InsightRec 0.287909
Han Cao 0.287909
Pavel Kushneryk 0.287909
iwi 0.287909
recsys2019S_10 0.287909
mlap 0.287909
gj 0.287909
MachineLearning 0.287909
arcticpizza 0.287909
Bananana 0.287909
BDG4 0.287909
HIL19 0.287909
soua 0.287909
TaewookKo 0.287909
Throwaway 1 0.287909
GCX 0.287909
six-seven 0.287909
Sparklers 0.287909
vadimfb 0.287909
DeepREC 0.287909
rs_agent 0.287909
RecommenderRangers 0.287909
Vadiraj 0.287909
DL2019 0.287909
SSN_CSE 0.287909
Group4Team 0.287909
The Fire Raises 0.287909
FelipeMarcelino 0.287909
KUMN 0.287909
Bot 0.287909
mre 0.287909
DeSI RecSys Group 0.287909
Cliche 0.287909
abc1 0.287909
Lord Helmchen 0.287909
Zafedom 0.287909
pangebot 0.287909
test_team 0.287909
aaa 0.287909
NoName 0.287909
PM 0.287903
760DreamTeam 0.287884
teamteam 0.286721
TUrteltauben 0.286329
lu 0.283864
jasdf4385 0.283603
luwei 0.282392
Random 0.281892
YaRS 0.281789
tm 0.28134
weilu 0.280761
74E 0.280284
catharijnesingel 0.277183
DL001 0.271576
recsys2019@protonmail.com 0.254831
P3 0.250855
redbull 0.243503
kavina 0.233393
swweg 0.219922
wsyssmtsff 0.217896
recsys2020@protonmail.com 0.216223
ZJU 0.181343
rho 0.177662
GJTNB 0.17654
JaiMataDi 0.175277
GoVa 0.173924
whatthe 0.16546
el cavaller fosc 0.155052
sfasdgasasg 0.152363
totoro 0.150899
barton 0.149609
PBnJ 0.134189
nightfury 0.10107
MudNinjas 0.004159
Knights 1.0E-6
KNTU 0
Kishan 0
Mikhail Efimov 0
2 Guys 1 Challenge 0
Go to Leaderboard →

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Check out the RecSys Challenge Google Forum or get in touch by mail via recsyschallenge2019@trivago.com.