🇯🇵 CHEN Dawei · JAPAN

36rank
+63.7Butler · 240 bds
+0.27per board
±4.9swing
+0.53vs par /bd · #18/126
+0.41adjusted /bd
Butler per round: 48.4 -10.6 -6.1 26.1 9.5 1.3 -20.6 23.3 -1.3 43 23.6 -11.6 -22.1 -7 -32.2by round

vs par split: bidding +0.30 · play +0.30

Strength of schedule: opponents averaged +0.15/bd (a tough draw) → opponent-adjusted +0.41/bd

Card play — on target: opening leads 83.3% #58 of 126 · declarer play 72.4% #77 of 126 · defence 89.3% #48 of 126

Card play by contract type — on target
vs NTvs a suit
Opening leads50.0% (14)92.3% (52)
Declarer play80.0% (15)69.8% (43)
Defence96.3% (27)87.5% (104)

Opening leads by suit led: ♠ 80.0% (15) · ♥ 71.4% (14) · ♦ 83.3% (18) · ♣ 94.7% (19)

vs par by strain: NT -0.54 (54) · a suit +0.83 (186)

vs par by level: part-score +1.01 (94) · game -0.37 (123) · slam +3.35 (23)

By role: declaring +0.37/bd (-2.16 vs par · 108) · defending +0.18/bd (+2.72 vs par · 132)

By vulnerability: vulnerable +0.17/bd (+0.05 vs par · 120) · not vulnerable +0.36/bd (+1.00 vs par · 120)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 1K.FurutaG.Bilski – T.BrownClosed16+48.4+3.02+2.69
Round 3K.FurutaJ.Fritsche – R.RohowskyClosed16-10.6-0.66+0.88
Round 4K.FurutaJ.Ho – N.ShenOpen16-6.1-0.38-0.44
Round 5K.FurutaK.Venkataraman – S.ChokshiOpen16+26.1+1.63+3.94
Round 7K.FurutaC.Gower – A.AptekerClosed16+9.5+0.59-0.19
Round 8K.FurutaC.Ju – Z.ShiOpen16+1.3+0.08-0.62
Round 10K.FurutaF.Karwur – J.GeorgeOpen16-20.6-1.29+0.56
Round 11K.FurutaM.Rosenberg – C.WillenkenClosed16+23.3+1.46+0.06
Round 13K.FurutaT.Forrester – A.RobsonOpen16-1.3-0.08+0.81
Round 14K.FurutaP.Lambardi – L.RizzoClosed16+43.0+2.69+4.44
Round 16K.FurutaR.Van Prooijen – J.VerheesClosed16+23.6+1.48+0.81
Round 17K.FurutaN.Bocchi – A.MadalaOpen16-11.6-0.72-1.81
Round 19K.FurutaR.Levin – S.WeinsteinOpen16-22.1-1.38-0.69
Round 20K.FurutaF.Fantoni – C.NunesClosed16-7.0-0.44-0.56
Round 21K.FurutaG.Narkiewicz – K.BurasOpen16-32.2-2.01-2.00

Every board — best Butler first↑ top

vs par = IMPs this pair scored above (+) or below (−) the board’s double-dummy par — what bidding and play (theirs and the opponents’) added or gave away against perfect play.

ButlerRoundOpponentsBdContractLeadResvs par
+16.1Round 14🇦🇷 ARGENTINA236♥♠A=+15
+15.4Round 1🇦🇺 AUSTRALIA57♠♥K-2+20
+11.8Round 11🇺🇸 USA232♠x♦K=+11
+11.1Round 4🇹🇼 CHINESE TAIPEI246♠♥K=+0
+10.9Round 5🇮🇳 INDIA34♦x♠2-4+12
+10.5Round 1🇦🇺 AUSTRALIA125♣♣5-9+12
+10.4Round 14🇦🇷 ARGENTINA216♥♠3-3+16
+9.8Round 5🇮🇳 INDIA46♣♠5+1+1
+9.4Round 1🇦🇺 AUSTRALIA66♥♦4+1-11
+9.3Round 10🇮🇩 INDONESIA303NT♥7+1+8
+9.1Round 14🇦🇷 ARGENTINA294♥♣J=+0
+9.0Round 7🇿🇦 SOUTH AFRICA123♥♠A+1+10
+8.9Round 14🇦🇷 ARGENTINA306♥♠4-1+14
+8.8Round 1🇦🇺 AUSTRALIA84♥♠6=+11
+8.7Round 5🇮🇳 INDIA133♠♦A=+12
+8.0Round 3🇩🇪 GERMANY86NT♠8-1+14
+7.8Round 3🇩🇪 GERMANY23♣x♥7-2+12
+7.6Round 16🇳🇱 NETHERLANDS223♥x♣6-3+9
+7.3Round 17🇮🇹 ITALY93NT♦A=+0
+7.1Round 14🇦🇷 ARGENTINA206♠♣2+1+13
+6.9Round 7🇿🇦 SOUTH AFRICA74♠♦3+2+13
+6.7Round 5🇮🇳 INDIA92♣♥2-4+7
+6.5Round 20🇲🇨 MONACO254♥♠3-1+10
+6.4Round 5🇮🇳 INDIA123♥♣9+2+15
+6.1Round 14🇦🇷 ARGENTINA286♥♦K+1+13
+6.0Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND14♥♣7-1+10
+5.4Round 21🇵🇱 POLAND13NT♦5+1+0
+5.3Round 17🇮🇹 ITALY144♠♥A=-1
+5.3Round 19🇺🇸 USA126♣♣2-2+13
+5.2Round 17🇮🇹 ITALY23NT♥2=+0
+5.1Round 1🇦🇺 AUSTRALIA103NT♦5+2+2
+5.1Round 20🇲🇨 MONACO203NT♦Q+1+0
+5.1Round 20🇲🇨 MONACO285♥♣A+1+12
+5.0Round 8🇨🇳 CHINA184♥♦6-1+12
+5.0Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND135♦x♥K-1+8
+4.8Round 7🇿🇦 SOUTH AFRICA112♠♠4+1+7
+4.7Round 16🇳🇱 NETHERLANDS273♠♣K+1+4
+4.7Round 20🇲🇨 MONACO222♥♦9-1+5
+4.6Round 5🇮🇳 INDIA84♥♣J-1+4
+4.6Round 8🇨🇳 CHINA243NT♦Q-1+10
+4.5Round 10🇮🇩 INDONESIA175♣♠A=+0
+4.3Round 11🇺🇸 USA2152♥♠K-2-5
+4.3Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND44♠♦7-2+2
+4.2Round 16🇳🇱 NETHERLANDS193NT♣6=-1
+4.1Round 4🇹🇼 CHINESE TAIPEI312♣♦J-1+5
+4.1Round 7🇿🇦 SOUTH AFRICA143♦♣K+1+0
+4.0Round 16🇳🇱 NETHERLANDS253♣♠J-1+4
+3.7Round 3🇩🇪 GERMANY153NT♠Q-2+8
+3.6Round 1🇦🇺 AUSTRALIA42♠♥Q=+6
+3.6Round 17🇮🇹 ITALY83♥♦6=+0
+3.6Round 20🇲🇨 MONACO232♠♠7=+6
+3.5Round 11🇺🇸 USA227♥♠2=+0
+3.5Round 19🇺🇸 USA1113♥♣Q-1+5
+3.4Round 4🇹🇼 CHINESE TAIPEI183♥♣A=+6
+3.4Round 21🇵🇱 POLAND124♠♦A=+1
+3.3Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND93♦♦3=-1
+3.2Round 11🇺🇸 USA2102♥+4-9
+3.2Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND144♠♦A+2+11
+3.0Round 7🇿🇦 SOUTH AFRICA44♥♥3=+0
+3.0Round 16🇳🇱 NETHERLANDS184♥♣3=+0
+2.9Round 4🇹🇼 CHINESE TAIPEI173♦♠A=+0
+2.9Round 5🇮🇳 INDIA152♠♠K-2+1
+2.7Round 19🇺🇸 USA151NT♠3+1+10
+2.7Round 20🇲🇨 MONACO272♠♥T+1-7
+2.5Round 14🇦🇷 ARGENTINA324♠♦3+1+0
+2.4Round 7🇿🇦 SOUTH AFRICA14♠♦8+2+11
+2.2Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND54♥♥4+1+1
+2.1Round 8🇨🇳 CHINA174♥♣K-2+5
+2.0Round 1🇦🇺 AUSTRALIA94♥♣4-1+5
+2.0Round 19🇺🇸 USA135♦x♠K-3-7
+1.9Round 8🇨🇳 CHINA203♣♠K-1+6
+1.9Round 19🇺🇸 USA114♦♠K+1+6
+1.8Round 5🇮🇳 INDIA163NT♠3-1+10
+1.8Round 11🇺🇸 USA262♠♥5-3+1
+1.8Round 11🇺🇸 USA2123♥♦8=+0
+1.7Round 1🇦🇺 AUSTRALIA23♠♥A=+0
+1.7Round 11🇺🇸 USA2133♠♥A=+8
+1.6Round 8🇨🇳 CHINA212♥♦4-2+3
+1.6Round 10🇮🇩 INDONESIA271NT♥7+1+0
+1.6Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND164♥♦3=+8
+1.5Round 16🇳🇱 NETHERLANDS174♠♦7=+0
+1.4Round 14🇦🇷 ARGENTINA173NT♠6=+7
+1.4Round 14🇦🇷 ARGENTINA224♠x♥K-1+5
+1.4Round 16🇳🇱 NETHERLANDS263NT♠Q-1+6
+1.3Round 17🇮🇹 ITALY66♦♣2=-2
+1.1Round 4🇹🇼 CHINESE TAIPEI303NT♠2-1+10
+1.1Round 5🇮🇳 INDIA64♠♥4-1+5
+1.0Round 5🇮🇳 INDIA113NT♦8+1+1
+1.0Round 7🇿🇦 SOUTH AFRICA62♥♠7=+0
+1.0Round 16🇳🇱 NETHERLANDS322♥♣A+1+0
+1.0Round 19🇺🇸 USA162♥♠K+1+0
+1.0Round 19🇺🇸 USA1154♠♣K=+0
+0.9Round 3🇩🇪 GERMANY73NT♥5+2+0
+0.9Round 5🇮🇳 INDIA54♥♦J+1+6
+0.8Round 5🇮🇳 INDIA12♠♣5+4+13
+0.8Round 11🇺🇸 USA253NT♦3+1+0
+0.8Round 16🇳🇱 NETHERLANDS293♥♦T=+0
+0.7Round 1🇦🇺 AUSTRALIA12♠♥5=+0
+0.7Round 8🇨🇳 CHINA193NT♣9-1+0
+0.7Round 11🇺🇸 USA2111NT♣5-1+3
+0.7Round 14🇦🇷 ARGENTINA254♠♣7+1+0
+0.7Round 16🇳🇱 NETHERLANDS202♣♠Q+2+0
+0.6Round 3🇩🇪 GERMANY124♥♣K=+0
+0.6Round 10🇮🇩 INDONESIA224♠♥K-1+10
+0.6Round 14🇦🇷 ARGENTINA263NT♦A+2+1
+0.6Round 17🇮🇹 ITALY54♠♣8+1+0
+0.5Round 10🇮🇩 INDONESIA243♠♦4-1-2
+0.5Round 11🇺🇸 USA2162♥♣A=+1
+0.5Round 20🇲🇨 MONACO193♠♣7-1-2
+0.4Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND74♠♦8=+1
+0.4Round 16🇳🇱 NETHERLANDS303NT♣Q=+1
+0.3Round 1🇦🇺 AUSTRALIA152♥♦Q=+0
+0.3Round 10🇮🇩 INDONESIA253♥♦Q+2-2
+0.3Round 11🇺🇸 USA242♥♠2=-1
+0.3Round 19🇺🇸 USA191♥♠5=+1
+0.3Round 21🇵🇱 POLAND33♦♣5-1-2
+0.2Round 3🇩🇪 GERMANY163NT♥5+2+11
+0.2Round 4🇹🇼 CHINESE TAIPEI325♥♣K=-1
+0.2Round 7🇿🇦 SOUTH AFRICA163♣♠3=+0
+0.2Round 10🇮🇩 INDONESIA263♠♦A+1+1
+0.2Round 16🇳🇱 NETHERLANDS232♦♦3=-1
+0.1Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND154♠♣K-1+6
+0.1Round 19🇺🇸 USA172♦♦9+1+0
+0.1Round 21🇵🇱 POLAND164♥♠K+1+10
-0.0Round 1🇦🇺 AUSTRALIA34♠♦A+1+0
-0.0Round 3🇩🇪 GERMANY114♥♥8+1+0
-0.0Round 8🇨🇳 CHINA264♠♣5+1-13
-0.0Round 10🇮🇩 INDONESIA294♥♦A+1+0
+0.0Round 20🇲🇨 MONACO313NT♠4+1+0
-0.0Round 21🇵🇱 POLAND95♦♣Q+1+1
-0.0Round 21🇵🇱 POLAND143♣♣3+1-5
-0.1Round 4🇹🇼 CHINESE TAIPEI251NT♦4-2-1
-0.1Round 8🇨🇳 CHINA273NT♥4+2-11
-0.1Round 8🇨🇳 CHINA284♠♦3+1+0
-0.1Round 11🇺🇸 USA2144♥♥2+1-14
-0.1Round 17🇮🇹 ITALY124♠♥J+1+0
-0.1Round 21🇵🇱 POLAND154♥♦J=-1
-0.2Round 3🇩🇪 GERMANY63♦♣A+2+6
-0.2Round 10🇮🇩 INDONESIA324NT♠7=+1
-0.2Round 11🇺🇸 USA214♠♥9+1+0
-0.2Round 17🇮🇹 ITALY112♠♥T-1-4
-0.3Round 20🇲🇨 MONACO264♥♦5=-1
-0.4Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND104♠♥K=-3
-0.5Round 16🇳🇱 NETHERLANDS214♥♣4=+1
-0.6Round 10🇮🇩 INDONESIA193♣♥T-1-3
-0.6Round 20🇲🇨 MONACO304♠♣T=+0
-0.7Round 8🇨🇳 CHINA322♥♠9+1-10
-0.7Round 10🇮🇩 INDONESIA202♠♦T=+0
-0.7Round 10🇮🇩 INDONESIA286♦♣Q+1+13
-0.7Round 16🇳🇱 NETHERLANDS241♠♣4=+1
-0.7Round 20🇲🇨 MONACO241NT♥2+1+0
-0.7Round 21🇵🇱 POLAND84♥+1+0
-0.8Round 11🇺🇸 USA293NT♦6+2+0
-0.9Round 4🇹🇼 CHINESE TAIPEI222♠♥2-1-2
-0.9Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND23NT♠3+2-1
-0.9Round 20🇲🇨 MONACO173♦♠J+2-7
-1.0Round 4🇹🇼 CHINESE TAIPEI213♥♦K-1+3
-1.0Round 7🇿🇦 SOUTH AFRICA102♠♥A=+0
-1.0Round 8🇨🇳 CHINA292♠♥J-1+0
-1.0Round 8🇨🇳 CHINA312♠♣K+1+0
-1.0Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND115♥♠A+1-11
-1.0Round 21🇵🇱 POLAND52♠♥Q+2+10
-1.1Round 1🇦🇺 AUSTRALIA143♠♥6-2+7
-1.1Round 7🇿🇦 SOUTH AFRICA133NT♠A+3-12
-1.1Round 19🇺🇸 USA143NT♥T+1+0
-1.1Round 21🇵🇱 POLAND61NT♠5+1+0
-1.2Round 1🇦🇺 AUSTRALIA72♥♣K+2+1
-1.2Round 3🇩🇪 GERMANY94♠♥6+2-13
-1.3Round 4🇹🇼 CHINESE TAIPEI264♠♦A+1+0
-1.3Round 7🇿🇦 SOUTH AFRICA92♥♠6+2-1
-1.4Round 4🇹🇼 CHINESE TAIPEI232NT♣6-2-8
-1.4Round 21🇵🇱 POLAND71NT♥3+1-1
-1.6Round 8🇨🇳 CHINA254♠♦3+1+0
-1.7Round 4🇹🇼 CHINESE TAIPEI281♠♦K+2+0
-1.7Round 4🇹🇼 CHINESE TAIPEI293♦♣6+1+0
-1.7Round 7🇿🇦 SOUTH AFRICA33NT♥3+1-13
-1.8Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND125♦♥A-2+0
-1.8Round 14🇦🇷 ARGENTINA184♠♦A=+0
-1.8Round 16🇳🇱 NETHERLANDS312NT♥6+1-6
-1.9Round 1🇦🇺 AUSTRALIA134♠-1-7
-1.9Round 3🇩🇪 GERMANY51NT♠10-1-4
-1.9Round 17🇮🇹 ITALY14♥♠3+1+0
-1.9Round 19🇺🇸 USA182♦♣K+2+0
-2.0Round 14🇦🇷 ARGENTINA244♥♠4+1-1
-2.0Round 21🇵🇱 POLAND133NT♠6+1+0
-2.1Round 1🇦🇺 AUSTRALIA165♥♣9-1+3
-2.1Round 3🇩🇪 GERMANY43♠♦2+1+1
-2.3Round 17🇮🇹 ITALY104♠♣3-1-6
-2.4Round 11🇺🇸 USA281NT♦6+3+6
-2.5Round 3🇩🇪 GERMANY134♠♦A+1+0
-2.5Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND34♠♦9-1-6
-2.6Round 3🇩🇪 GERMANY36♥♠K=+0
-2.7Round 5🇮🇳 INDIA104♠♥A=+0
-2.8Round 1🇦🇺 AUSTRALIA113NT♥2-2-6
-2.9Round 8🇨🇳 CHINA233NT♠6+1-11
-2.9Round 8🇨🇳 CHINA303NT♦2+1-1
-2.9Round 16🇳🇱 NETHERLANDS283♠♥4-1-5
-3.0Round 14🇦🇷 ARGENTINA193♣♦J+1+7
-3.0Round 17🇮🇹 ITALY153♠♥A+1-6
-3.4Round 7🇿🇦 SOUTH AFRICA154♠♥3-1-10
-3.5Round 4🇹🇼 CHINESE TAIPEI196♣♠A=+2
-3.6Round 3🇩🇪 GERMANY143NT♠5+2-10
-3.6Round 11🇺🇸 USA272♥♦4+1+0
-3.6Round 17🇮🇹 ITALY133NT♦2=+0
-4.0Round 5🇮🇳 INDIA76♥♣2+1-1
-4.0Round 7🇿🇦 SOUTH AFRICA53NT♠6=+0
-4.0Round 17🇮🇹 ITALY31NT♦5+1+1
-4.0Round 17🇮🇹 ITALY72♥♣A=+0
-4.0Round 20🇲🇨 MONACO322♥♥J+2-2
-4.2Round 17🇮🇹 ITALY44♥♠3=+1
-4.3Round 7🇿🇦 SOUTH AFRICA84♥♠J+1-8
-4.3Round 8🇨🇳 CHINA224♠♥K-2+0
-4.7Round 19🇺🇸 USA1102♠♠3+1-6
-5.0Round 10🇮🇩 INDONESIA185♣x♣A-2+5
-5.1Round 7🇿🇦 SOUTH AFRICA26♦♣2=+0
-5.3Round 19🇺🇸 USA1163NT♣4-2-8
-5.4Round 19🇺🇸 USA1124♥♠3+2-11
-6.5Round 21🇵🇱 POLAND106♣♠A-1-13
-6.7Round 21🇵🇱 POLAND25♣♦9-1-6
-6.8Round 3🇩🇪 GERMANY104♠♠2=+0
-6.9Round 4🇹🇼 CHINESE TAIPEI276♠♦5-1-11
-7.0Round 14🇦🇷 ARGENTINA316♦♣A=-12
-7.0Round 19🇺🇸 USA1133NT♦9=+0
-7.5Round 14🇦🇷 ARGENTINA274♥♦Q=-7
-8.3Round 20🇲🇨 MONACO185♣♥K=+0
-8.8Round 10🇮🇩 INDONESIA234♥x♦3=-5
-9.0Round 20🇲🇨 MONACO213NT♥7=-11
-9.2Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND87♥♥7=+0
-9.4Round 5🇮🇳 INDIA24♠♣2-1-11
-10.0Round 21🇵🇱 POLAND44♥♠6-1-12
-10.2Round 10🇮🇩 INDONESIA312♥x♠2-5-10
-10.4Round 4🇹🇼 CHINESE TAIPEI203NT♠Q=-10
-10.9Round 3🇩🇪 GERMANY12♠x♦Q=-11
-11.4Round 10🇮🇩 INDONESIA216♦♥2=-7
-11.4Round 20🇲🇨 MONACO293NT♥Q-1-12
-11.6Round 13🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND63NTx♠9-3-12
-11.6Round 17🇮🇹 ITALY165♦♠A-1-12
-11.9Round 21🇵🇱 POLAND115♠♥5-2-14
-13.4Round 5🇮🇳 INDIA145♦x♥8=-12
-14.5Round 19🇺🇸 USA1143♥xx♠5-3-14