🇯🇵 CHEN Dawei · JAPAN

6rank
+170.3Butler · 208 bds
+0.82per board
±4.5swing
+0.71vs par /bd · #16/101
+0.76adjusted /bd
Butler per round: 32.8 -1.1 3.4 8.4 12.5 -1.6 25.2 19.7 0.1 20.5 28.6 13.8 8by round

vs par split: bidding -0.21 · play +0.91

Strength of schedule: opponents averaged -0.06/bd (an easy draw) → opponent-adjusted +0.76/bd

Card play — on target: opening leads 71.4% #95 of 101 · declarer play 74.5% #48 of 101 · defence 97.1% #1 of 101

Card play by contract type — on target
vs NTvs a suit
Opening leads75.0% (8)70.6% (34)
Declarer play42.9% (7)80.0% (40)
Defence95.8% (24)97.5% (79)

Opening leads by suit led: ♠ 80.0% (10) · ♥ 66.7% (15) · ♦ 60.0% (10) · ♣ 85.7% (7)

vs par by strain: NT +1.24 (46) · a suit +0.55 (161)

vs par by level: part-score +0.67 (70) · game +0.38 (120) · slam +3.06 (17)

By role: declaring +1.13/bd (-1.61 vs par · 104) · defending +0.51/bd (+3.04 vs par · 104)

By vulnerability: vulnerable +0.72/bd (+0.25 vs par · 104) · not vulnerable +0.91/bd (+1.17 vs par · 104)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 2K.FurutaI.Al-Qattan – A.AlroomiClosed16+32.8+2.05+1.94
Round 3K.FurutaA.Qureshi – Z.NaqiOpen16-1.1-0.07-0.62
Round 4K.FurutaS.Karlsson – K.SigurhjartarsonOpen16+3.4+0.21-0.19
Round 5K.FurutaE.Koksoy – E.KayaClosed16+8.4+0.53-0.81
Round 8K.FurutaS.Law – W.YiuClosed16+12.5+0.78+2.19
Round 9K.FurutaK.Rubins – M.LorencsOpen16-1.6-0.10+0.50
Round 10K.FurutaF.Hinden – G.OsborneClosed16+25.2+1.57+1.44
Round 11K.FurutaJ.Lall – K.BathurstOpen16+19.7+1.23+0.81
Round 12K.FurutaL.Eide – K.EllingsenClosed16+0.1+0.01-2.44
Round 13K.FurutaE.Muzzio – H.CamberosOpen16+20.5+1.28+4.25
Round 14K.FurutaG.Herrera – P.HerreraClosed16+28.6+1.79+1.50
Round 16K.FurutaP.Gawrys – M.KlukowskiClosed16+13.8+0.86+0.62
Round 17K.FurutaF.Multon – P.ZimmermannOpen16+8.0+0.50+0.06

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
+13.0Round 13🇦🇷 ARGENTINA76NT♥10-2+13
+12.8Round 5🇹🇷 TURKEY157♠x♣A-5+15
+11.6Round 17🇲🇨 MONACO33NTx♠7=+4
+11.5Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND294♠♥10+1+4
+11.1Round 2🇰🇼 KUWAIT304♠♥8-4+12
+10.8Round 2🇰🇼 KUWAIT173♠♥8-1+14
+9.4Round 13🇦🇷 ARGENTINA16♠♣2-1+16
+9.0Round 8🇭🇰 CHINA HONG KONG276♦♣5-1+14
+8.8Round 11🇺🇸 USA144♠♣3=+1
+8.8Round 16🇵🇱 POLAND324♥♠9-1+10
+8.5Round 13🇦🇷 ARGENTINA56♦♠3-1+17
+8.4Round 2🇰🇼 KUWAIT255♦♠6+1-13
+8.3Round 17🇲🇨 MONACO46♦♥3-1+17
+7.7Round 14🇲🇽 MEXICO203NT♣2=+0
+7.5Round 3🇵🇰 PAKISTAN134♠♠4=+10
+7.1Round 2🇰🇼 KUWAIT193NT♠2=+3
+7.0Round 12🇳🇴 NORWAY225♦x♦A=+6
+6.9Round 8🇭🇰 CHINA HONG KONG314♥x♠3-1+8
+6.9Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND213♠♥K+1+10
+6.9Round 16🇵🇱 POLAND313NT♦6=+6
+6.7Round 2🇰🇼 KUWAIT231♣♠5=+11
+6.6Round 11🇺🇸 USA65♦♥6=-1
+6.3Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND315♦♥K=+0
+6.3Round 14🇲🇽 MEXICO225♠♣6=+11
+6.2Round 8🇭🇰 CHINA HONG KONG254♥♣8-2+6
+6.1Round 4🇮🇸 ICELAND224♥♣9+1-4
+6.0Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND262♠♥J+2+10
+5.9Round 2🇰🇼 KUWAIT274♠♣9=+0
+5.8Round 5🇹🇷 TURKEY13NT♦8=+0
+5.8Round 9🇱🇻 LATVIA103NT♥7+1+1
+5.8Round 17🇲🇨 MONACO143♥x♥2-2-4
+5.7Round 5🇹🇷 TURKEY94♠♦7-3+11
+5.6Round 8🇭🇰 CHINA HONG KONG184♠x♣2-2+11
+5.3Round 13🇦🇷 ARGENTINA93♦♣3=+6
+5.1Round 13🇦🇷 ARGENTINA34♠x♥J-2+5
+5.1Round 14🇲🇽 MEXICO264♠♥2-1+6
+5.0Round 4🇮🇸 ICELAND253♥♣2=+6
+5.0Round 9🇱🇻 LATVIA153♥♦3-2+7
+4.9Round 3🇵🇰 PAKISTAN145♣♠9-1+8
+4.7Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND284♣♣6-2+8
+4.6Round 5🇹🇷 TURKEY62♣x♦8-1+6
+4.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND226♠♣J=+0
+4.4Round 4🇮🇸 ICELAND241NTx♠K-1+1
+4.2Round 8🇭🇰 CHINA HONG KONG242♦♠Q+1+8
+3.9Round 4🇮🇸 ICELAND204♥♣Q=+3
+3.9Round 14🇲🇽 MEXICO174♥♠10+2+2
+3.8Round 11🇺🇸 USA13NT♦5-2+11
+3.8Round 12🇳🇴 NORWAY184♥♦K=-1
+3.7Round 14🇲🇽 MEXICO242♥♠8+1+6
+3.4Round 9🇱🇻 LATVIA116♦♥A=+0
+3.3Round 13🇦🇷 ARGENTINA164♦♣K-1+5
+3.2Round 4🇮🇸 ICELAND302♠♦5+1+6
+3.2Round 11🇺🇸 USA82♠♥3-1+10
+3.1Round 12🇳🇴 NORWAY214♠x♠7-1+0
+3.0Round 16🇵🇱 POLAND232♠♥9-2+2
+3.0Round 17🇲🇨 MONACO153NT♦2-1+12
+2.9Round 3🇵🇰 PAKISTAN113♦♣7+1+1
+2.9Round 17🇲🇨 MONACO115♥x♦5-1+5
+2.8Round 2🇰🇼 KUWAIT291NT♠10-3+5
+2.8Round 9🇱🇻 LATVIA24♠♦8=-1
+2.8Round 13🇦🇷 ARGENTINA103NT♥3+1+0
+2.7Round 16🇵🇱 POLAND192♠♣Q-2+0
+2.6Round 16🇵🇱 POLAND173NT♥2-3+6
+2.5Round 2🇰🇼 KUWAIT313♥♣Q=+0
+2.5Round 12🇳🇴 NORWAY294♥♦J+1-13
+2.5Round 12🇳🇴 NORWAY323NT♠2=+0
+2.5Round 17🇲🇨 MONACO24♠♣J+1-14
+2.4Round 16🇵🇱 POLAND271NT♥A+2-6
+2.3Round 2🇰🇼 KUWAIT223NT♥Q-2+11
+2.3Round 3🇵🇰 PAKISTAN83♣♥A+1+7
+2.3Round 4🇮🇸 ICELAND234♠♥K+1+4
+2.3Round 8🇭🇰 CHINA HONG KONG193♦♠6-4+2
+2.2Round 9🇱🇻 LATVIA14♠♥4+1+1
+2.1Round 3🇵🇰 PAKISTAN22♥♠4=-1
+2.1Round 9🇱🇻 LATVIA63NT♠4+3+10
+1.9Round 11🇺🇸 USA33♠♥A+1-8
+1.9Round 17🇲🇨 MONACO124♠♦2=+0
+1.8Round 14🇲🇽 MEXICO252NT♣3=+0
+1.7Round 14🇲🇽 MEXICO234♥♦Q+2+1
+1.6Round 11🇺🇸 USA164♠♠4-1+5
+1.6Round 14🇲🇽 MEXICO324♠♦3+1+0
+1.5Round 11🇺🇸 USA115♦x♣K-1-5
+1.4Round 11🇺🇸 USA131NT♦K+3+9
+1.4Round 14🇲🇽 MEXICO194♥♠K-4+8
+1.3Round 5🇹🇷 TURKEY114♠♥2=+0
+1.3Round 17🇲🇨 MONACO74♠♦J+2+13
+1.2Round 2🇰🇼 KUWAIT322♥♠K=+0
+1.1Round 4🇮🇸 ICELAND174♠x♥A-1+0
+1.1Round 16🇵🇱 POLAND305♠♣K+1-5
+1.0Round 14🇲🇽 MEXICO212♠♣5=+0
+0.9Round 3🇵🇰 PAKISTAN12♠♦7+1+1
+0.9Round 5🇹🇷 TURKEY33NT♠6+2+1
+0.9Round 5🇹🇷 TURKEY82♣♦7+1+0
+0.9Round 9🇱🇻 LATVIA83♦♥10=-1
+0.9Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND175♣♣A=+0
+0.9Round 11🇺🇸 USA74♥♠2+1+1
+0.9Round 14🇲🇽 MEXICO184♠♦K=+0
+0.8Round 3🇵🇰 PAKISTAN166♥♠6=+0
+0.8Round 4🇮🇸 ICELAND283NT♦5=+2
+0.8Round 11🇺🇸 USA43NT♥2=-1
+0.6Round 12🇳🇴 NORWAY303NT♦Q+3+14
+0.6Round 13🇦🇷 ARGENTINA114♠♣Q+2+1
+0.6Round 16🇵🇱 POLAND183♠♣K-2-5
+0.6Round 16🇵🇱 POLAND292♠♦K=+0
+0.5Round 9🇱🇻 LATVIA33♥♣K-1-2
+0.5Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND253NT♠2=+0
+0.4Round 4🇮🇸 ICELAND214♥♠Q=+0
+0.4Round 8🇭🇰 CHINA HONG KONG303NT♠2-1+5
+0.4Round 14🇲🇽 MEXICO29Pass+3
+0.4Round 16🇵🇱 POLAND224♦♥K-1+1
+0.3Round 12🇳🇴 NORWAY283♦♥K=+0
+0.2Round 8🇭🇰 CHINA HONG KONG203NT♦7+1+1
+0.2Round 9🇱🇻 LATVIA73NT♠4=+1
+0.2Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND203NT♠Q+1+1
+0.2Round 14🇲🇽 MEXICO303♥♦6-1+2
+0.1Round 5🇹🇷 TURKEY24♥♣Q+1+0
+0.1Round 8🇭🇰 CHINA HONG KONG224♥♦5+1-1
+0.1Round 12🇳🇴 NORWAY241NT♦3+1+0
+0.1Round 16🇵🇱 POLAND253NT♦3=+1
+0.1Round 16🇵🇱 POLAND282♠♥J+2+1
-0.0Round 8🇭🇰 CHINA HONG KONG174♥♣3+1+0
-0.0Round 8🇭🇰 CHINA HONG KONG323NT♠Q=+2
-0.0Round 11🇺🇸 USA24♠♣J+1+0
-0.1Round 3🇵🇰 PAKISTAN63NT♠4+1-1
-0.1Round 5🇹🇷 TURKEY73NT♦4+3-13
-0.1Round 12🇳🇴 NORWAY252♠♠9-1+0
-0.2Round 5🇹🇷 TURKEY163♠♦A=+6
-0.3Round 5🇹🇷 TURKEY133NT♥6+2+0
-0.4Round 3🇵🇰 PAKISTAN101NT♦10-1+0
-0.4Round 3🇵🇰 PAKISTAN123♦♥9+1-7
-0.4Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND194♠♥2+1-13
-0.4Round 11🇺🇸 USA124♥♥3+1+0
-0.4Round 12🇳🇴 NORWAY274♥♣K=+0
-0.4Round 17🇲🇨 MONACO14♠♠3+1+0
-0.5Round 16🇵🇱 POLAND242♠♠8=+7
-0.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND243NT♠K-1-5
-0.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND303♣♥4=+1
-0.8Round 12🇳🇴 NORWAY314♥♠7-2-6
-0.9Round 4🇮🇸 ICELAND293♦♥Q=+1
-0.9Round 9🇱🇻 LATVIA146♠♥3+1+11
-1.0Round 11🇺🇸 USA53♣♣5-2+1
-1.1Round 4🇮🇸 ICELAND264♠♣2+2-1
-1.1Round 4🇮🇸 ICELAND314♠♣K+1+0
-1.1Round 17🇲🇨 MONACO95♥♠2-2-5
-1.2Round 9🇱🇻 LATVIA161NT♥A=+1
-1.2Round 17🇲🇨 MONACO53♣♣8=+1
-1.3Round 17🇲🇨 MONACO105♦♦2=+1
-1.4Round 3🇵🇰 PAKISTAN54♠♣4=-8
-1.4Round 13🇦🇷 ARGENTINA154♠♥3+2+13
-1.5Round 14🇲🇽 MEXICO314♠♦K=-8
-1.6Round 5🇹🇷 TURKEY44♥♠3-2-3
-1.6Round 9🇱🇻 LATVIA93♣♦10+1-1
-1.6Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND272♠♥J=+5
-1.6Round 13🇦🇷 ARGENTINA123♠♦3-1-4
-1.6Round 13🇦🇷 ARGENTINA134♠♥8+2+12
-1.6Round 14🇲🇽 MEXICO282♠♣K+1-7
-1.6Round 16🇵🇱 POLAND203NT♠K-2-8
-1.7Round 12🇳🇴 NORWAY176♥x♠A-1-9
-1.8Round 2🇰🇼 KUWAIT284♥♦8=+0
-1.9Round 3🇵🇰 PAKISTAN73NT♥6=+0
-1.9Round 4🇮🇸 ICELAND275♦♠A=-3
-2.0Round 5🇹🇷 TURKEY123♥♦3=-7
-2.1Round 2🇰🇼 KUWAIT214♥♣J-1+2
-2.2Round 13🇦🇷 ARGENTINA43♠♥5-1-5
-2.3Round 17🇲🇨 MONACO63♣♣5=-5
-2.4Round 5🇹🇷 TURKEY53NT♠4-1-5
-2.5Round 9🇱🇻 LATVIA42♠♥2+1+0
-2.5Round 12🇳🇴 NORWAY202♥♦8+1-7
-2.5Round 12🇳🇴 NORWAY232♣♥8=-6
-2.6Round 2🇰🇼 KUWAIT184♥♠2+1-4
-2.7Round 4🇮🇸 ICELAND194♠♦A-1-5
-2.8Round 11🇺🇸 USA155♣♣5=+1
-2.9Round 2🇰🇼 KUWAIT205♦♣9=-10
-2.9Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND234♠♦3+3+9
-3.2Round 3🇵🇰 PAKISTAN94♥♦A+1+0
-3.2Round 11🇺🇸 USA93♠♠8-2-2
-3.2Round 17🇲🇨 MONACO162♥♥8-2-3
-3.4Round 8🇭🇰 CHINA HONG KONG233♠♣4=-7
-3.4Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND184♠x♦7-1+0
-3.4Round 11🇺🇸 USA104♠♥A-3-9
-3.4Round 13🇦🇷 ARGENTINA24♠♣J=+1
-3.5Round 8🇭🇰 CHINA HONG KONG295♦♥4=-3
-3.5Round 13🇦🇷 ARGENTINA143♥♦Q+1+4
-3.6Round 2🇰🇼 KUWAIT244♠♣8-2+0
-3.6Round 3🇵🇰 PAKISTAN34♥♣9-1-6
-3.9Round 16🇵🇱 POLAND214♦♣4=+0
-4.0Round 14🇲🇽 MEXICO276♦♥A=+0
-4.1Round 8🇭🇰 CHINA HONG KONG264♥♠K+1+0
-4.3Round 12🇳🇴 NORWAY263NT♦A-2-8
-4.4Round 9🇱🇻 LATVIA123NT♠5=+0
-4.5Round 9🇱🇻 LATVIA133♥♣A+2-9
-4.6Round 3🇵🇰 PAKISTAN42♥♠J-1-6
-5.2Round 8🇭🇰 CHINA HONG KONG213NT♦5=+0
-5.4Round 13🇦🇷 ARGENTINA86♣♥8+1-4
-5.9Round 4🇮🇸 ICELAND184♥♦Q=+0
-5.9Round 5🇹🇷 TURKEY102♠x♠2-1-10
-6.2Round 8🇭🇰 CHINA HONG KONG284♠♣10+1-11
-6.9Round 3🇵🇰 PAKISTAN154♠♣K=-8
-6.9Round 10🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND323NT♥Q=-7
-7.5Round 12🇳🇴 NORWAY194♠x♥K-1-9
-8.4Round 13🇦🇷 ARGENTINA63♥♦7-1-12
-9.4Round 9🇱🇻 LATVIA54♠♦5-1-10
-9.4Round 17🇲🇨 MONACO133NT♦2=-10
-9.5Round 16🇵🇱 POLAND263NT♦5=+0
-10.2Round 4🇮🇸 ICELAND326♠♣3-1-13
-10.4Round 17🇲🇨 MONACO86♠♦2-1-11
-11.2Round 5🇹🇷 TURKEY146♠♦Q-1-14
-13.0Round 2🇰🇼 KUWAIT266♥♠4=+0