🇨🇦 DONG Hao Zhen (John) · CANADA

13rank
+174.4Butler · 204 bds
+0.85per board
±4.5swing
+0.47vs par /bd · #29/92
+0.80adjusted /bd
Butler per round: 13.6 3.8 16.2 2.9 21.8 -5.8 17.5 -5.1 -4.9 11.2 11.7 30.3 11.9 29.1 3.2 16.4 0.6by round

vs par split: bidding +0.45 · play +0.02

Strength of schedule: opponents averaged -0.06/bd (an easy draw) → opponent-adjusted +0.80/bd

Card play — on target: opening leads 77.8% #44 of 92 · declarer play 66.7% #68 of 92 · defence 82.9% #37 of 92

Card play by contract type — on target
vs NTvs a suit
Opening leads90.0% (10)73.1% (26)
Declarer play61.5% (13)68.2% (44)
Defence73.9% (23)86.4% (59)

Opening leads by suit led: ♠ 85.7% (7) · ♥ 72.7% (11) · ♦ 85.7% (7) · ♣ 72.7% (11)

vs par by strain: NT +0.14 (49) · a suit +0.57 (155)

vs par by level: part-score +0.42 (85) · game +0.58 (109) · slam -0.30 (10)

By role: declaring +1.06/bd (-0.80 vs par · 122) · defending +0.55/bd (+2.37 vs par · 82)

By vulnerability: vulnerable +0.52/bd (+0.41 vs par · 102) · not vulnerable +1.19/bd (+0.53 vs par · 102)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 1M.ZhaoPATEL KUNAL – PATEL VINAYOpen12+13.6+1.13+1.33
Round 2M.ZhaoM.Saetre – C.JohnsenClosed12+3.8+0.32+0.75
Round 3M.ZhaoC.Wang – K.LoOpen12+16.2+1.35+2.25
Round 4M.ZhaoY.Lu – S.LiuClosed12+2.9+0.24+0.25
Round 5M.ZhaoD.Tylvad – A.TylvadOpen12+21.8+1.82+1.67
Round 6M.ZhaoR.Bloch – T.ZobelClosed12-5.8-0.48+1.17
Round 7M.ZhaoA.Zhou – M.HuOpen12+17.5+1.46+0.17
Round 8M.ZhaoS.Zur – N.BergerClosed12-5.1-0.42-0.83
Round 9M.ZhaoX.Wang – Q.GanOpen12-4.9-0.41-2.67
Round 10M.ZhaoJ.Bakhshi – H.RoseClosed12+11.2+0.93+0.67
Round 11M.ZhaoT.Fu – L.TangOpen12+11.7+0.97-0.17
Round 12M.ZhaoA.Nilsson – M.Bjoerk HeedClosed12+30.3+2.52+2.58
Round 13M.ZhaoS.Bora – I.ErClosed12+11.9+0.99-0.75
Round 14M.ZhaoG.Gosalamang – C.KengaletsweOpen12+29.1+2.43+1.42
Round 15M.ZhaoI.Virvidakis – N.MallosiClosed12+3.2+0.27-0.08
Round 16M.ZhaoK.Dransfeld – M.GuendelClosed12+16.4+1.37+2.25
Round 17M.ZhaoDZIUBA JAKUB – A.GrochowskiOpen12+0.6+0.05-2.00

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
+13.3Round 4🇨🇳 CHINA 395♥♦J-2+17
+12.8Round 7🇺🇸 USA87♠♦K=+0
+11.2Round 12🇸🇪 SWEDEN66NTx♦9-3+12
+10.5Round 9🇨🇳 CHINA 2103NT♠3+1+11
+10.2Round 3🇹🇼 CHINESE TAIPEI101♣xx♠6+2+10
+10.0Round 7🇺🇸 USA124♥♦5=+11
+9.9Round 14BOTSWANA33NT♥J-1+12
+8.9Round 14BOTSWANA11♠x♥2-3+3
+8.9Round 15🇬🇷 GREECE37♣♣7=-2
+8.5Round 4🇨🇳 CHINA 3104♥♣10=+1
+8.4Round 12🇸🇪 SWEDEN73♠♣J-3+5
+8.2Round 16🇩🇪 GERMANY115♦♥10-2+14
+8.0Round 11🇨🇳 CHINA 195♣♣7=+7
+7.8Round 13🇹🇷 TURKEY104♥♠A=+1
+7.4Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND124♠♠K=+3
+7.4Round 16🇩🇪 GERMANY72♠♦K+3+15
+7.4Round 16🇩🇪 GERMANY97♠♠2=+0
+7.3Round 5🇩🇰 DENMARK114♥♣6=+0
+7.1Round 4🇨🇳 CHINA 354♥♠Q=+8
+7.0Round 12🇸🇪 SWEDEN94♠x♥A-2+8
+6.8Round 1🇮🇳 INDIA83♦♣10+3+7
+6.4Round 17🇵🇱 POLAND104♥♠K=+0
+6.3Round 13🇹🇷 TURKEY93NT♠6-2+11
+6.2Round 1🇮🇳 INDIA104♥♠3=+0
+6.1Round 3🇹🇼 CHINESE TAIPEI64♥♦K-3+19
+6.1Round 15🇬🇷 GREECE83NT♥K+2+0
+6.0Round 13🇹🇷 TURKEY55♠♣Q-2+6
+5.7Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND95♣♠J+1+13
+5.6Round 5🇩🇰 DENMARK14♠♦A-2+5
+5.6Round 5🇩🇰 DENMARK24♥♠3-3+2
+5.5Round 16🇩🇪 GERMANY124♥♠Q+1+8
+5.2Round 5🇩🇰 DENMARK44♠♥A=+9
+5.2Round 14BOTSWANA51♠♥9=+10
+5.2Round 14BOTSWANA72♠♦7=+0
+5.1Round 5🇩🇰 DENMARK53♥♦2-1+11
+4.8Round 1🇮🇳 INDIA94♠♥K=+1
+4.8Round 15🇬🇷 GREECE44♠♣A+1+4
+4.6Round 9🇨🇳 CHINA 292♠♥J=+12
+4.5Round 2🇳🇴 NORWAY24♥♣4+1+0
+4.5Round 2🇳🇴 NORWAY43♣♦10-3-7
+4.5Round 17🇵🇱 POLAND35♦x♣A-2+5
+4.3Round 6🇫🇷 FRANCE114♠♥Q+1+1
+4.2Round 5🇩🇰 DENMARK63♣♦A+2+6
+4.1Round 14BOTSWANA103NT♦A+2+1
+4.0Round 6🇫🇷 FRANCE23NT♥Q-1+5
+4.0Round 7🇺🇸 USA104♠♣5-2+8
+3.9Round 5🇩🇰 DENMARK85♦x♥A-1+0
+3.8Round 2🇳🇴 NORWAY121NT♠K+1+6
+3.8Round 4🇨🇳 CHINA 364♠♠2-1+6
+3.8Round 8🇮🇱 ISRAEL14♥♠7=-1
+3.8Round 15🇬🇷 GREECE63NT♠6+3+13
+3.5Round 11🇨🇳 CHINA 172♥♣7=+0
+3.4Round 7🇺🇸 USA73♥♥9+1+1
+3.4Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND74♠♣J=+0
+3.4Round 17🇵🇱 POLAND94♥♠J+1+1
+3.2Round 1🇮🇳 INDIA14♥♣2-2+5
+3.2Round 13🇹🇷 TURKEY23NT♠4+2+0
+3.1Round 6🇫🇷 FRANCE103♣♠8+3+10
+3.0Round 14BOTSWANA113NT♥A-3+4
+2.9Round 3🇹🇼 CHINESE TAIPEI55♥♥J-2+7
+2.9Round 6🇫🇷 FRANCE126♠♥6-1+10
+2.9Round 8🇮🇱 ISRAEL72NT♣5-1+5
+2.9Round 8🇮🇱 ISRAEL123NT♦4+1+0
+2.9Round 13🇹🇷 TURKEY85♦♠8-1+4
+2.7Round 9🇨🇳 CHINA 232♠♠2=+0
+2.7Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND33NT♦K+3+2
+2.6Round 4🇨🇳 CHINA 383♥♥2-4+8
+2.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND53♣♠10=-1
+2.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND63♥♠5=+1
+2.5Round 3🇹🇼 CHINESE TAIPEI83♥♣10+1-4
+2.5Round 11🇨🇳 CHINA 184♥♠10+1+1
+2.5Round 12🇸🇪 SWEDEN85♠♣Q+1+1
+2.4Round 1🇮🇳 INDIA63♣♥10-1+11
+2.4Round 2🇳🇴 NORWAY111NTx♥6-1+5
+2.3Round 3🇹🇼 CHINESE TAIPEI94♥♦6=+0
+2.2Round 8🇮🇱 ISRAEL34♣♣A=+0
+2.2Round 14BOTSWANA41NT♥2+2+1
+2.1Round 14BOTSWANA22♦♥8+2+1
+2.0Round 17🇵🇱 POLAND64♠♦J+1+0
+1.9Round 17🇵🇱 POLAND113♥x♥3-1+0
+1.8Round 15🇬🇷 GREECE93NT♥4=+0
+1.7Round 1🇮🇳 INDIA44♠♥2+1+0
+1.7Round 12🇸🇪 SWEDEN16♦♣8=-2
+1.7Round 12🇸🇪 SWEDEN23NT♠5=-1
+1.7Round 16🇩🇪 GERMANY13♣♣2+2+6
+1.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND114♣♠A=+0
+1.6Round 11🇨🇳 CHINA 141NT♣Q=+2
+1.6Round 11🇨🇳 CHINA 1124♠♦8+1+0
+1.6Round 12🇸🇪 SWEDEN53NT♦10+2+11
+1.6Round 12🇸🇪 SWEDEN123NT♥3-1-5
+1.6Round 16🇩🇪 GERMANY54♠♥A=+3
+1.5Round 7🇺🇸 USA13♠♥K-2-5
+1.4Round 3🇹🇼 CHINESE TAIPEI124♠♣A-1+5
+1.4Round 11🇨🇳 CHINA 153♣♠2+1+0
+1.3Round 2🇳🇴 NORWAY33NT♥K+2+0
+1.2Round 1🇮🇳 INDIA21♦♥A+2+7
+1.2Round 6🇫🇷 FRANCE13♠♥J=+7
+1.1Round 5🇩🇰 DENMARK103♠♥2=+0
+1.1Round 12🇸🇪 SWEDEN43♣♥10-1+1
+1.0Round 9🇨🇳 CHINA 212♣♣10+2+1
+1.0Round 11🇨🇳 CHINA 114♥♦A=+8
+0.9Round 11🇨🇳 CHINA 1111NT♥2+1+1
+0.9Round 13🇹🇷 TURKEY32♦♥8+1+0
+0.9Round 17🇵🇱 POLAND51NT♥6-1+4
+0.8Round 1🇮🇳 INDIA74♥♣7+1+0
+0.8Round 11🇨🇳 CHINA 122NT♥5=-9
+0.8Round 17🇵🇱 POLAND43NT♥8+1-1
+0.6Round 2🇳🇴 NORWAY63NT♠K=-1
+0.6Round 4🇨🇳 CHINA 3113NT♣2=-1
+0.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND14♥♣A=-1
+0.5Round 9🇨🇳 CHINA 284♠♠2+1+1
+0.5Round 12🇸🇪 SWEDEN33♦♠A-2+0
+0.4Round 2🇳🇴 NORWAY12♠♦A-1+3
+0.4Round 6🇫🇷 FRANCE73♠♦10-1+1
+0.4Round 13🇹🇷 TURKEY42♥♦8=-11
+0.4Round 14BOTSWANA123♥♠4-2-3
+0.2Round 3🇹🇼 CHINESE TAIPEI113♠♥9=+0
+0.2Round 8🇮🇱 ISRAEL112♥♠K-1+3
+0.1Round 2🇳🇴 NORWAY53♥♣9-1+1
+0.1Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND101NT♥3=+2
+0.0Round 3🇹🇼 CHINESE TAIPEI74♠♥6=+3
+0.0Round 6🇫🇷 FRANCE85♣♦3=+1
+0.0Round 8🇮🇱 ISRAEL22♥♦2-1+4
+0.0Round 16🇩🇪 GERMANY34NT♠3+3-3
+0.0Round 17🇵🇱 POLAND12♦♥5+2-8
-0.1Round 7🇺🇸 USA22♦♣2-1+4
-0.2Round 2🇳🇴 NORWAY84♥♦2+2+1
-0.2Round 8🇮🇱 ISRAEL53NT♥2=+1
-0.3Round 3🇹🇼 CHINESE TAIPEI24♥♠K=+1
-0.4Round 7🇺🇸 USA111♠x♠8-2-3
-0.4Round 15🇬🇷 GREECE72♥♠8+1-10
-0.5Round 8🇮🇱 ISRAEL94♠x♦J-1-6
-0.8Round 13🇹🇷 TURKEY63♣♠K=+0
-0.9Round 9🇨🇳 CHINA 254♠♥K+2-13
-1.1Round 1🇮🇳 INDIA114♠♦4+1+0
-1.1Round 6🇫🇷 FRANCE35♦♦6-1-5
-1.1Round 11🇨🇳 CHINA 133♠♣5-1-4
-1.1Round 16🇩🇪 GERMANY81♣♦4-1-4
-1.2Round 4🇨🇳 CHINA 3123NT♠Q+1+1
-1.2Round 9🇨🇳 CHINA 224♥♥3+1-1
-1.4Round 7🇺🇸 USA62♠♥J=-1
-1.4Round 8🇮🇱 ISRAEL64♠♦6-1-5
-1.4Round 8🇮🇱 ISRAEL101NT♠3+1+0
-1.4Round 16🇩🇪 GERMANY22♥♦2+1+0
-1.5Round 2🇳🇴 NORWAY103♥♠7=+0
-1.5Round 17🇵🇱 POLAND74♥♣2+1+0
-1.6Round 7🇺🇸 USA44♠♣9+1+0
-1.6Round 7🇺🇸 USA92♣♦5-1+2
-1.8Round 15🇬🇷 GREECE23NT♥7=+0
-1.8Round 15🇬🇷 GREECE102♦♠9-1+1
-1.9Round 3🇹🇼 CHINESE TAIPEI35♦♥Q=-14
-2.0Round 4🇨🇳 CHINA 333♠♥8+2-6
-2.1Round 9🇨🇳 CHINA 2122♥♣10=-5
-2.1Round 15🇬🇷 GREECE14♠♦3=+0
-2.1Round 15🇬🇷 GREECE113♦♥6=+0
-2.2Round 1🇮🇳 INDIA53NT♦6+3-2
-2.2Round 9🇨🇳 CHINA 263♥♣10+1-6
-2.2Round 14BOTSWANA62NT♦8=+0
-2.3Round 5🇩🇰 DENMARK92♣♥10-2+0
-2.3Round 9🇨🇳 CHINA 241♥♠K-2-9
-2.3Round 13🇹🇷 TURKEY74♠♦8-1+0
-3.0Round 16🇩🇪 GERMANY102NT♦6=+1
-3.1Round 3🇹🇼 CHINESE TAIPEI14♠♥9=+1
-3.2Round 14BOTSWANA93♦♣2=-1
-3.3Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND82♠♣4=+0
-3.3Round 13🇹🇷 TURKEY124♠♦6+1+11
-3.4Round 6🇫🇷 FRANCE45♦x♣A-1-10
-3.4Round 11🇨🇳 CHINA 161NT♠K=-5
-3.4Round 12🇸🇪 SWEDEN106♠♠5+1-1
-3.5Round 17🇵🇱 POLAND124♠♦K-1-6
-3.6Round 5🇩🇰 DENMARK33NT♥2-2-11
-3.6Round 12🇸🇪 SWEDEN116♦♣7+1+2
-3.9Round 16🇩🇪 GERMANY44♠♦K=-3
-4.1Round 3🇹🇼 CHINESE TAIPEI45♠♦3+1-1
-4.1Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND42♠♥J-2-3
-4.2Round 1🇮🇳 INDIA32♥♦Q+1-7
-4.2Round 8🇮🇱 ISRAEL84♦♥Q-3-2
-4.4Round 13🇹🇷 TURKEY13NT♥Q-1-17
-4.5Round 2🇳🇴 NORWAY94♠♥4=+1
-4.5Round 7🇺🇸 USA52NT♥J-3-4
-4.6Round 5🇩🇰 DENMARK71NT♠2-2-3
-4.6Round 7🇺🇸 USA32♥x♠A-1-11
-4.8Round 13🇹🇷 TURKEY114♠♣4+3-14
-4.8Round 17🇵🇱 POLAND24♠♣3=-12
-4.9Round 6🇫🇷 FRANCE65♥♣6=-4
-5.1Round 11🇨🇳 CHINA 1103♣♥K-2-3
-5.2Round 4🇨🇳 CHINA 324♦♥Q-1-6
-5.6Round 4🇨🇳 CHINA 313♥x♣3-3-3
-5.6Round 6🇫🇷 FRANCE94♥♠A=-3
-5.7Round 5🇩🇰 DENMARK123♥♠Q+1+1
-6.0Round 1🇮🇳 INDIA125♦♠K-1-6
-6.0Round 15🇬🇷 GREECE53NT♣10-1-6
-6.0Round 16🇩🇪 GERMANY64♥♠4-1-10
-6.5Round 14BOTSWANA86♥♣5-2-11
-6.7Round 6🇫🇷 FRANCE53NT♠5+1+1
-6.8Round 4🇨🇳 CHINA 373NT♣J-4-11
-7.4Round 9🇨🇳 CHINA 2114♥♦7-1-11
-7.6Round 2🇳🇴 NORWAY74♠♣7=+0
-8.0Round 15🇬🇷 GREECE123NT♣6+1-1
-8.1Round 9🇨🇳 CHINA 275♠♣4-1-12
-8.1Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND24NT♣8-2-8
-9.4Round 8🇮🇱 ISRAEL43NT♥7-3-9
-9.5Round 17🇵🇱 POLAND83NT♣2=-7
-12.2Round 4🇨🇳 CHINA 346♣♦4+1-11