🇯🇵 CHEN Dawei · JAPAN

79rank
+0.5Butler · 238 bds
+0.00per board
±4.1swing
+0.08vs par /bd · #73/140
-0.04adjusted /bd
Butler per round: -12.8 -6.5 -6.6 -9.4 25.2 13.5 29.8 -8.3 3.9 32.7 -4.4 -23.3 -20.7 3.7 -1.2 -24.7 9.6by round

vs par split: bidding +0.19 · play -0.06

Strength of schedule: opponents averaged -0.04/bd (an average draw) → opponent-adjusted -0.04/bd

Card play — on target: opening leads 77.3% #111 of 140 · declarer play 73.7% #77 of 140 · defence 89.3% #26 of 140

Bidding activity — not a pass: 43.6% #56 of 140 (280/642)

Card play by contract type — on target
vs NTvs a suit
Opening leads66.7% (15)80.4% (51)
Declarer play65.2% (23)79.4% (34)
Defence87.5% (32)90.0% (90)

Opening leads by suit led: ♠ 70.6% (17) · ♥ 70.6% (17) · ♦ 83.3% (12) · ♣ 85.0% (20)

vs par by strain: NT -0.54 (68) · a suit +0.40 (169)

vs par by level: part-score +0.82 (87) · game -0.23 (136) · slam -0.64 (14)

By role: declaring -0.21/bd (-2.64 vs par · 115) · defending +0.20/bd (+2.63 vs par · 123)

By vulnerability: vulnerable +0.15/bd (-0.07 vs par · 119) · not vulnerable -0.14/bd (+0.23 vs par · 119)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 1A.YanagisawaP.Jepsen – S.Buus ThomsenClosed14-12.8-0.91-2.00
Round 2A.YanagisawaD.Attanasio – G.ManaraClosed14-6.5-0.46+3.00
Round 3A.YanagisawaY.Chen – B.FuOpen14-6.6-0.47-1.21
Round 5A.YanagisawaP.Zatorski – K.DufratClosed14-9.4-0.67-2.79
Round 7A.YanagisawaJ.Rhind – J.BussellClosed14+25.2+1.80+0.86
Round 8A.YanagisawaM.Hindie – H.GhoneimOpen14+13.5+0.96+2.00
Round 9A.YanagisawaM.Lemarinel – R.Wan HoiClosed14+29.8+2.13+3.71
Round 11A.YanagisawaJ.Grue – S.RimstedtClosed14-8.3-0.59+2.00
Round 12A.YanagisawaK.Mak – W.WangClosed14+3.9+0.28+1.00
Round 13A.YanagisawaB.Shnier – B.SenenskyClosed14+32.7+2.34+3.36
Round 15A.YanagisawaP.Cronier – B.CronierClosed14-4.4-0.31-0.07
Round 16A.YanagisawaJ.Kranyak – G.BottaClosed14-23.3-1.66-2.36
Round 17A.YanagisawaI.Kaprey – L.WeersClosed14-20.7-1.48-3.00
Round 19A.YanagisawaL.Honti – K.MezeiClosed14+3.7+0.26+1.14
Round 20A.YanagisawaS.Garafulic – P.RavennaClosed14-1.2-0.09-1.71
Round 22A.YanagisawaA.Asulin – R.PachtmanClosed14-24.7-1.76-2.50
Round 23A.YanagisawaR.Mihai – G.MihaiOpen14+9.6+0.69-0.07

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
+13.3Round 19🇭🇺 HUNGARY126♣♠T=+7
+10.6Round 7🇧🇲 BERMUDA54NT♥K-1+12
+10.5Round 9🇷🇪 REUNION73NT♦3-2+13
+10.3Round 23🇷🇴 ROMANIA36♣♥6-1+10
+10.2Round 13🇨🇦 CANADA54♠♦8+2+11
+10.0Round 15🇫🇷 FRANCE55♥♦Q-1+12
+9.6Round 3🇨🇳 CHINA23NT♣T+1+11
+9.2Round 7🇧🇲 BERMUDA143NT♣K=+11
+9.2Round 12🇭🇰 HONG KONG CHINA284♥♣5=+13
+9.0Round 13🇨🇦 CANADA33♥♣8+1+10
+8.7Round 9🇷🇪 REUNION116♦♣3-1+11
+8.5Round 13🇨🇦 CANADA133NT♥2+3-9
+8.4Round 7🇧🇲 BERMUDA94♥♣K=+3
+7.3Round 20🇧🇷 BRAZIL185♦x♠A-2+11
+6.8Round 8🇦🇪 UNITED ARAB EMIRATES154♠♣K+2+9
+6.6Round 15🇫🇷 FRANCE73♥♦T-1+12
+6.3Round 3🇨🇳 CHINA74♥♦K=+3
+5.8Round 19🇭🇺 HUNGARY94♠♦K-2+13
+5.6Round 7🇧🇲 BERMUDA112♠♥K+1+1
+5.4Round 20🇧🇷 BRAZIL274♠♦Q=+0
+5.3Round 17🇿🇦 SOUTH AFRICA132♥♣3-3+5
+5.3Round 23🇷🇴 ROMANIA96NT♣4-1+11
+5.2Round 8🇦🇪 UNITED ARAB EMIRATES202♠♥4-1+0
+5.0Round 13🇨🇦 CANADA143NT♦4+2+14
+4.9Round 8🇦🇪 UNITED ARAB EMIRATES163NT♥3-2+13
+4.8Round 15🇫🇷 FRANCE113NT♠6-1+8
+4.7Round 2🇮🇹 ITALY202♠x♦A-1+10
+4.4Round 19🇭🇺 HUNGARY65♦x♠5-1+5
+4.3Round 16🇺🇸 USA1254♥♣3-1+12
+4.2Round 9🇷🇪 REUNION24♠x♠3-1+0
+4.2Round 12🇭🇰 HONG KONG CHINA246♥♣K+1+11
+3.8Round 3🇨🇳 CHINA83NT♥9+1+1
+3.7Round 9🇷🇪 REUNION94♥♦A-1+5
+3.5Round 16🇺🇸 USA1275♠♦8=+11
+3.3Round 19🇭🇺 HUNGARY84♦♥J=+0
+3.2Round 11🇺🇸 USA2102♣♣A+3+15
+3.2Round 22🇮🇱 ISRAEL283♦♣A-2-1
+3.0Round 17🇿🇦 SOUTH AFRICA112♥♣3+1+0
+2.9Round 1🇩🇰 DENMARK133♦♠5-1-1
+2.9Round 16🇺🇸 USA1213♦♠K=+6
+2.7Round 2🇮🇹 ITALY184♥♠5+2+13
+2.7Round 5🇵🇱 POLAND92♥♦A+2+6
+2.7Round 9🇷🇪 REUNION32♥♣3+1+10
+2.7Round 16🇺🇸 USA1152♠♥8=+6
+2.6Round 13🇨🇦 CANADA113♦♣A+3+13
+2.5Round 8🇦🇪 UNITED ARAB EMIRATES272♠♥4-2+8
+2.5Round 11🇺🇸 USA2114NT♥5+2+10
+2.4Round 8🇦🇪 UNITED ARAB EMIRATES214♠♥A+1+0
+2.3Round 7🇧🇲 BERMUDA133♠♠2=+8
+2.3Round 11🇺🇸 USA2143NT♠T+1+4
+2.3Round 15🇫🇷 FRANCE31NT♠3-2-1
+2.3Round 22🇮🇱 ISRAEL255♦x♣K-2+2
+2.0Round 9🇷🇪 REUNION143♦♥A+1+8
+2.0Round 12🇭🇰 HONG KONG CHINA212♥♣2=-1
+2.0Round 19🇭🇺 HUNGARY144♠♥A-1+4
+2.0Round 23🇷🇴 ROMANIA104♠♣8-2+7
+1.9Round 3🇨🇳 CHINA53NT♣6+2+0
+1.9Round 19🇭🇺 HUNGARY53♥♣A-1+4
+1.8Round 2🇮🇹 ITALY252♠♥3+1+1
+1.7Round 2🇮🇹 ITALY246♠x♦A-4+0
+1.7Round 22🇮🇱 ISRAEL224♠♥K-1-8
+1.6Round 5🇵🇱 POLAND15♥♣A-1+2
+1.6Round 11🇺🇸 USA264♥♠7-1+5
+1.6Round 17🇿🇦 SOUTH AFRICA24♠♣T+1+0
+1.5Round 9🇷🇪 REUNION41NT♦Q=+0
+1.5Round 9🇷🇪 REUNION103♥♦Q=-2
+1.5Round 23🇷🇴 ROMANIA71NT♥4=+0
+1.4Round 20🇧🇷 BRAZIL233NT♥7+1+1
+1.4Round 20🇧🇷 BRAZIL282♠♣A-3+1
+1.3Round 1🇩🇰 DENMARK113NT♣5+2+1
+1.3Round 3🇨🇳 CHINA123♦♥A-1+8
+1.3Round 12🇭🇰 HONG KONG CHINA224♠♦7+1+0
+1.3Round 16🇺🇸 USA1161NT♦K=-1
+1.3Round 20🇧🇷 BRAZIL192♣♥A-1+3
+1.3Round 23🇷🇴 ROMANIA131NT♣5+1+0
+1.2Round 5🇵🇱 POLAND34♠♣8=+0
+1.1Round 5🇵🇱 POLAND104♠♣5=+0
+1.1Round 8🇦🇪 UNITED ARAB EMIRATES241♠♦3-1+4
+1.1Round 20🇧🇷 BRAZIL161NT♠5=-1
+1.1Round 22🇮🇱 ISRAEL194♣♣8-1+2
+1.0Round 1🇩🇰 DENMARK13♥♣A=+1
+1.0Round 2🇮🇹 ITALY163NT♠T-3+6
+1.0Round 7🇧🇲 BERMUDA122♦♣K+1+5
+1.0Round 13🇨🇦 CANADA124♥♦5=+3
+1.0Round 17🇿🇦 SOUTH AFRICA33NT♠5=+0
+0.9Round 9🇷🇪 REUNION83NT♥2-2+0
+0.9Round 11🇺🇸 USA223♠♥6-3+0
+0.9Round 11🇺🇸 USA234♠♣Q-1+10
+0.9Round 23🇷🇴 ROMANIA53♠♥4+1+4
+0.8Round 7🇧🇲 BERMUDA33NT♠T+1+1
+0.7Round 1🇩🇰 DENMARK124♠♣T=+0
+0.7Round 3🇨🇳 CHINA112♥♦5+1-6
+0.7Round 5🇵🇱 POLAND63NT♣5+1+0
+0.7Round 12🇭🇰 HONG KONG CHINA153NT♥7-1-2
+0.7Round 15🇫🇷 FRANCE126♠♦A=+0
+0.7Round 16🇺🇸 USA1234♥♣J+1-13
+0.7Round 19🇭🇺 HUNGARY23NT♣7=+1
+0.7Round 22🇮🇱 ISRAEL154♥♣6=+1
+0.7Round 23🇷🇴 ROMANIA13NT♥2+2-10
+0.6Round 9🇷🇪 REUNION14♠x♦T-2-4
+0.5Round 1🇩🇰 DENMARK94♥♣6+2+11
+0.5Round 11🇺🇸 USA291NT♦Q=+1
+0.5Round 13🇨🇦 CANADA23NT♥3=+1
+0.5Round 15🇫🇷 FRANCE14♥♠T=-1
+0.5Round 19🇭🇺 HUNGARY73♦♣A+1-10
+0.5Round 19🇭🇺 HUNGARY134♠♥3+1+0
+0.5Round 20🇧🇷 BRAZIL223NT♦Q+2+0
+0.4Round 2🇮🇹 ITALY193NT♥2+3+11
+0.4Round 9🇷🇪 REUNION54♥♠K+2+11
+0.4Round 12🇭🇰 HONG KONG CHINA233♥♦T+1-1
+0.4Round 22🇮🇱 ISRAEL241NT♦7=-5
+0.3Round 5🇵🇱 POLAND133♦♦A=+0
+0.3Round 8🇦🇪 UNITED ARAB EMIRATES173NT♠A-3+2
+0.3Round 8🇦🇪 UNITED ARAB EMIRATES252♠♦K-2+1
+0.3Round 13🇨🇦 CANADA44♥♣T=+1
+0.2Round 7🇧🇲 BERMUDA71NT♠4+1+0
+0.2Round 20🇧🇷 BRAZIL202♥♠4+3+10
+0.2Round 23🇷🇴 ROMANIA44♥♥9+1+0
+0.1Round 1🇩🇰 DENMARK25♦♥Q=+0
-0.0Round 1🇩🇰 DENMARK35♦♠A+1-10
+0.0Round 1🇩🇰 DENMARK54♠♠5+1+0
-0.0Round 1🇩🇰 DENMARK83NT♣3=+1
+0.0Round 12🇭🇰 HONG KONG CHINA174♠♥Q+1+0
-0.0Round 13🇨🇦 CANADA84♥♠Q+1-1
+0.0Round 15🇫🇷 FRANCE104♠♥8+1+0
-0.1Round 3🇨🇳 CHINA103NT♥7+3-13
-0.1Round 5🇵🇱 POLAND23NT♣6+3-11
-0.1Round 8🇦🇪 UNITED ARAB EMIRATES234♠♦6+1+0
-0.1Round 13🇨🇦 CANADA63♥♠Q=+0
-0.2Round 12🇭🇰 HONG KONG CHINA204♠♥A+1-13
-0.3Round 1🇩🇰 DENMARK144♥♠A=+0
-0.3Round 7🇧🇲 BERMUDA63♦♣A+1+0
-0.3Round 8🇦🇪 UNITED ARAB EMIRATES223NT♠J=-1
-0.3Round 12🇭🇰 HONG KONG CHINA253NT♣5+1-1
-0.3Round 13🇨🇦 CANADA73NT♠5+2+0
-0.4Round 1🇩🇰 DENMARK104♥♦3=+0
-0.4Round 2🇮🇹 ITALY263NT♦J+1+0
-0.4Round 5🇵🇱 POLAND72NT♥2=+0
-0.5Round 23🇷🇴 ROMANIA84♥♦J+1+0
-0.5Round 23🇷🇴 ROMANIA143♦♠4+1+7
-0.6Round 8🇦🇪 UNITED ARAB EMIRATES282♠♣A=+0
-0.7Round 2🇮🇹 ITALY274♠♣5=+1
-0.7Round 13🇨🇦 CANADA94♣♠4=+10
-0.7Round 20🇧🇷 BRAZIL152♥♠A+1-1
-0.8Round 2🇮🇹 ITALY223NT♣T=+11
-0.8Round 17🇿🇦 SOUTH AFRICA14♥♠5=+0
-0.8Round 17🇿🇦 SOUTH AFRICA103♦♣6=+0
-0.8Round 20🇧🇷 BRAZIL173NT♦5+2-11
-0.8Round 23🇷🇴 ROMANIA24♠x♦A-1+0
-0.9Round 11🇺🇸 USA214♥♣K-1-10
-1.0Round 17🇿🇦 SOUTH AFRICA71NT♦K+1+0
-1.1Round 7🇧🇲 BERMUDA82♥♦2-2+0
-1.2Round 16🇺🇸 USA1184♥♠T-1+5
-1.3Round 5🇵🇱 POLAND84♣♥A-3-2
-1.3Round 11🇺🇸 USA2133♠♥A=+0
-1.3Round 20🇧🇷 BRAZIL253NT♣6+1-11
-1.3Round 22🇮🇱 ISRAEL214♠♥Q+1+0
-1.4Round 5🇵🇱 POLAND54♥♣J=-1
-1.4Round 7🇧🇲 BERMUDA13♠♥A+1-2
-1.4Round 22🇮🇱 ISRAEL173♥♣K+2+6
-1.5Round 12🇭🇰 HONG KONG CHINA185♦♠A=+0
-1.5Round 13🇨🇦 CANADA12♠♥3-1+2
-1.5Round 17🇿🇦 SOUTH AFRICA62♣♥K=-7
-1.5Round 17🇿🇦 SOUTH AFRICA93NT♥T+3-11
-1.6Round 3🇨🇳 CHINA142♥♦T-2-8
-1.6Round 9🇷🇪 REUNION134♥♠3+1+0
-1.7Round 2🇮🇹 ITALY231NT♥9+3-2
-1.7Round 15🇫🇷 FRANCE81NT♦6-2+1
-1.7Round 16🇺🇸 USA1284♠x♥A-2-5
-1.8Round 8🇦🇪 UNITED ARAB EMIRATES183♥♠A-2-2
-1.8Round 13🇨🇦 CANADA102♥♥T+2-8
-1.9Round 2🇮🇹 ITALY211NT♥T-2+9
-1.9Round 5🇵🇱 POLAND146♥♣5+1-11
-1.9Round 12🇭🇰 HONG KONG CHINA274♥♠Q+2+11
-2.0Round 12🇭🇰 HONG KONG CHINA262♠♣Q=+0
-2.0Round 17🇿🇦 SOUTH AFRICA82♠♦A=-1
-2.0Round 20🇧🇷 BRAZIL244♥♦K=+0
-2.1Round 5🇵🇱 POLAND42♠♦A=+0
-2.2Round 9🇷🇪 REUNION124♠♣J=+0
-2.2Round 11🇺🇸 USA253NT♠Q-1-5
-2.2Round 23🇷🇴 ROMANIA126♥♦T-1-17
-2.3Round 2🇮🇹 ITALY281NT♥3-1-4
-2.3Round 7🇧🇲 BERMUDA44♠♣8+2-13
-2.3Round 11🇺🇸 USA283♥♣5-2+1
-2.4Round 3🇨🇳 CHINA44♥♠T+3-2
-2.4Round 19🇭🇺 HUNGARY35♣♠J-5+9
-2.4Round 22🇮🇱 ISRAEL203♦♣Q=+1
-2.5Round 11🇺🇸 USA272♣♣6+2+0
-2.6Round 17🇿🇦 SOUTH AFRICA53♠♣2=+0
-2.7Round 2🇮🇹 ITALY176NT♥9-1-14
-2.7Round 16🇺🇸 USA1263NT♠4=-10
-2.7Round 20🇧🇷 BRAZIL213NT♥5=-13
-2.7Round 22🇮🇱 ISRAEL272♠♣K+1-7
-2.8Round 3🇨🇳 CHINA63NT♠5+1+12
-2.8Round 5🇵🇱 POLAND112♠♥A-1-8
-2.9Round 3🇨🇳 CHINA14♠♦T=+0
-3.0Round 15🇫🇷 FRANCE132♥♦Q=+1
-3.1Round 9🇷🇪 REUNION64♠♥2=+0
-3.2Round 8🇦🇪 UNITED ARAB EMIRATES194♠♣3+1+0
-3.2Round 12🇭🇰 HONG KONG CHINA164♠♦5+1+0
-3.2Round 16🇺🇸 USA1243NT♥5-3-7
-3.3Round 11🇺🇸 USA243NT♠J=-3
-3.3Round 15🇫🇷 FRANCE65♣♣A=-11
-3.3Round 23🇷🇴 ROMANIA61NT♣7+1-5
-3.5Round 7🇧🇲 BERMUDA103NT♣Q=+0
-3.6Round 1🇩🇰 DENMARK63♥♣6-2-8
-3.6Round 1🇩🇰 DENMARK73♠♠T+2-10
-3.9Round 17🇿🇦 SOUTH AFRICA143NT♥Q-3-7
-4.0Round 8🇦🇪 UNITED ARAB EMIRATES264♥♣2-1-6
-4.0Round 15🇫🇷 FRANCE43♥♣A-1-5
-4.2Round 16🇺🇸 USA1194♠♣K+2-14
-4.3Round 7🇧🇲 BERMUDA24♥♥8+3-14
-4.5Round 16🇺🇸 USA1174♥♣K=+0
-4.8Round 12🇭🇰 HONG KONG CHINA194♠♥A=-3
-4.9Round 22🇮🇱 ISRAEL18Adj.♦8-12
-5.2Round 15🇫🇷 FRANCE93NT♣5-2-8
-5.3Round 19🇭🇺 HUNGARY13♥♦K+1-6
-5.3Round 22🇮🇱 ISRAEL264♥♦K=-3
-5.3Round 23🇷🇴 ROMANIA115♥♦2=-8
-5.7Round 3🇨🇳 CHINA33NT♠7-1-10
-5.7Round 19🇭🇺 HUNGARY113NT♦9-3-7
-5.9Round 15🇫🇷 FRANCE144♠x♥6+1-6
-6.1Round 19🇭🇺 HUNGARY45♦♠K-2-17
-6.2Round 15🇫🇷 FRANCE24♠♣J=-3
-6.3Round 3🇨🇳 CHINA94♥x♠T-2-5
-6.5Round 22🇮🇱 ISRAEL234♠♦2+1-11
-7.0Round 5🇵🇱 POLAND124♥♠K+3-14
-7.6Round 16🇺🇸 USA1224♦♣2+1-6
-7.6Round 17🇿🇦 SOUTH AFRICA123NT♠K-4-11
-7.7Round 11🇺🇸 USA2124♠♥8=+0
-8.3Round 2🇮🇹 ITALY156♣♥A=+0
-8.4Round 3🇨🇳 CHINA133♣♠5-2-8
-9.2Round 19🇭🇺 HUNGARY106♠♥K=+13
-9.6Round 22🇮🇱 ISRAEL165♣♥K=+0
-9.9Round 17🇿🇦 SOUTH AFRICA43NT♥3=-10
-11.4Round 1🇩🇰 DENMARK44♥♣T=-13
-12.3Round 20🇧🇷 BRAZIL266♠♥K-1-13
-13.6Round 16🇺🇸 USA1206♥♣A-1-17