CHEN J D · SHAN FENG

568rank
-50.0Butler · 140 bds
-0.36per board
±4.3swing
+0.15vs par /bd · #269/672
-0.42adjusted /bd
Butler per round: -7.1 -3.6 -8.3 -0 4.6 9.6 -4.6 -24.9 3.1 -1.8 -1.5 10.1 -25.6by round

vs par split: bidding +0.48 · play -0.52

Strength of schedule: opponents averaged -0.07/bd (an easy draw) → opponent-adjusted -0.42/bd

Card play — on target: opening leads 83.3% #279 of 671 · declarer play 55.0% #651 of 671 · defence 86.5% #279 of 672

Card play by contract type — on target
vs NTvs a suit
Opening leads·83.3% (30)
Declarer play·55.0% (20)
Defence·86.5% (52)

Opening leads by suit led: ♠ 100.0% (7) · ♥ 60.0% (10) · ♦ 85.7% (7) · ♣ 100.0% (6)

vs par by strain: a suit -0.04 (92)

vs par by level: part-score -0.47 (36) · game -0.62 (50) · slam +7.33 (6)

By role: declaring +0.20/bd (-1.18 vs par · 66) · defending -0.85/bd (+1.34 vs par · 74)

By vulnerability: vulnerable -0.31/bd (+0.42 vs par · 78) · not vulnerable -0.41/bd (-0.19 vs par · 62)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 1G.WeiD.Lilley – Z.NagyOpen10-7.1-0.71+1.00
Round 2G.WeiP.Choy – Y.TanOpen10-3.6-0.36+3.70
Round 3G.WeiL.Ni – H.LiClosed10-8.3-0.83+0.90
Round 4G.WeiM.Park – I.HwangClosed10-0.0-0.00+0.00
Round 5G.WeiY.Hu – Q.ZhangClosed10+4.6+0.46-0.40
Round 6G.WeiT.Walsh – P.GoodmanClosed10+9.6+0.96-0.10
Round 7G.WeiY.Shao – J.HuOpen10-4.6-0.46+0.50
Round 8G.WeiY.Cheng – C.ChenClosed10-24.9-2.49-3.20
Round 9G.WeiF.Liu – C.WangClosed10+3.1+0.31+0.00
Round 10G.WeiH.Yanagisawa – K.HirakiClosed10-1.8-0.18+0.40
Round 12G.WeiE.Greco – G.HampsonOpen10-14.9-1.49-2.60
Round 13G.WeiH.Jiu – Z.SunClosed10+10.1+1.01+3.20
Round 15G.WeiB.Shan – G.ShenOpen10-25.6-2.56-3.30

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
+12.6Round 10YANAGISAWA83Nx♣4-4+13
+11.2Round 3NINGBOYONGGUAN274♠x♥A=+12
+10.4Round 13SHANGHAI GOODWAY56♦♣5-1+16
+9.2Round 4HAPPY BRIDGE64♠♣10+1+0
+9.0Round 9TONGJI UNIVERSITY253N♦5=+10
+6.9Round 2SCTT175♣♠J=+12
+6.8Round 13SHANGHAI GOODWAY86♠♦Q-1+17
+6.6Round 5LIANHUA123N♥6=+7
+6.4Round 5LIANHUA156♦♠J=-2
+6.0Round 1HOFFMAN23N♣K+1+8
+5.6Round 9TONGJI UNIVERSITY272♦♥5-4+8
+5.1Round 6DELANEY214♥♠4+2+1
+4.9Round 5LIANHUA141N♠Q+1+6
+4.7Round 7PEKING UNIVERSITY55♠x♦Q-1+7
+4.5Round 13SHANGHAI GOODWAY66♣♥3-1+14
+4.1Round 2SCTT123♣♥8-2+6
+4.0Round 4HAPPY BRIDGE42♥♠9-1+11
+3.7Round 3NINGBOYONGGUAN265♣♦A=+7
+3.6Round 13SHANGHAI GOODWAY44♠♣J=-1
+3.5Round 1HOFFMAN34♠♣A-3+11
+3.5Round 4HAPPY BRIDGE103N♠5-1+6
+3.1Round 12O'ROURKE274♥♦Q+1-5
+3.1Round 12O'ROURKE291N♦5=+5
+3.0Round 3NINGBOYONGGUAN293N♣2+3+1
+2.4Round 10YANAGISAWA71N♦7+3-8
+2.3Round 12O'ROURKE264♠♣A-1+6
+2.1Round 2SCTT161N♠J+1+0
+2.1Round 15SHANGHAI KEJU272♥♣2+1+0
+2.0Round 15SHANGHAI KEJU282♠♦A=+0
+1.9Round 7PEKING UNIVERSITY74♠♠Q-1+6
+1.8Round 1HOFFMAN54♠♠2-1+5
+1.8Round 6DELANEY241N♠K=-1
+1.6Round 2SCTT184♠♥A-1+4
+1.5Round 8RIGHT CALL173N♥7+1-5
+1.4Round 4HAPPY BRIDGE74♣♦Q+1+0
+1.4Round 6DELANEY292♦♦7=+1
+1.4Round 10YANAGISAWA64♠♣A+1+1
+1.3Round 3NINGBOYONGGUAN211N♣9=+2
+1.2Round 5LIANHUA172♠♣3-1-2
+1.2Round 13SHANGHAI GOODWAY14♠♠4=+0
+1.0Round 6DELANEY222♠♦K+1+6
+0.9Round 8RIGHT CALL134♠♠3+2+7
+0.9Round 8RIGHT CALL181♠♣7=-1
+0.9Round 9TONGJI UNIVERSITY244♥♦6=-5
+0.9Round 10YANAGISAWA11N♦A-1+4
+0.8Round 6DELANEY253♣♥A-1-3
+0.8Round 7PEKING UNIVERSITY94♥♣5+2-11
+0.8Round 12O'ROURKE224♣♥A=+0
+0.7Round 1HOFFMAN103N♠Q+2+4
+0.7Round 15SHANGHAI KEJU242♥x♠7-1+5
+0.4Round 6DELANEY233♥♣A=+0
+0.4Round 6DELANEY303N♠2-1+5
+0.4Round 13SHANGHAI GOODWAY74♥♦A=-1
+0.3Round 3NINGBOYONGGUAN223N♥2=+5
+0.2Round 1HOFFMAN43♠♥Q-1+1
+0.2Round 7PEKING UNIVERSITY44♥♠3=+1
+0.2Round 10YANAGISAWA53N♣J+3+10
+0.0Round 6DELANEY283N♥3+2+0
+0.0Round 7PEKING UNIVERSITY31N♣A-2+9
-0.1Round 7PEKING UNIVERSITY14♥♣8=-1
-0.2Round 2SCTT203N♠4+3+13
-0.2Round 6DELANEY274♥♦K-1-5
-0.3Round 10YANAGISAWA32♠♠9+1+0
-0.4Round 9TONGJI UNIVERSITY285♦♠A+1+5
-0.5Round 5LIANHUA113♣♠6-1+4
-0.5Round 9TONGJI UNIVERSITY292N♥5-1+0
-0.5Round 12O'ROURKE235♦♠A-1-6
-0.6Round 5LIANHUA204♠♣A=+1
-0.7Round 7PEKING UNIVERSITY102♥♦K+1+0
-0.7Round 8RIGHT CALL142♠♥A-1-2
-0.7Round 9TONGJI UNIVERSITY231N♥4=-1
-0.7Round 15SHANGHAI KEJU212♠♣Q+2-1
-0.8Round 4HAPPY BRIDGE13♠♥6-1-4
-0.8Round 12O'ROURKE253N♥5+2-6
-0.8Round 13SHANGHAI GOODWAY33N♥7+2+0
-0.9Round 7PEKING UNIVERSITY64♥♥J+1+0
-1.0Round 3NINGBOYONGGUAN252♠♦4-1-1
-1.0Round 12O'ROURKE213♥♦6+1-2
-1.0Round 15SHANGHAI KEJU294♠♣A=+0
-1.1Round 4HAPPY BRIDGE23N♦4=-1
-1.1Round 6DELANEY264♠♥Q=-5
-1.1Round 8RIGHT CALL162♠♥A+1+0
-1.2Round 5LIANHUA161N♥3=-2
-1.3Round 3NINGBOYONGGUAN242N♣K+2-1
-1.4Round 1HOFFMAN93N♥10+2+0
-1.5Round 9TONGJI UNIVERSITY303♠♣K=+0
-1.7Round 2SCTT154♥♦K+1+0
-1.8Round 7PEKING UNIVERSITY21N♠10+1+0
-1.9Round 2SCTT111N♥4+1+0
-2.1Round 1HOFFMAN13♠♦8-2-8
-2.1Round 4HAPPY BRIDGE83♠♦Q+1-1
-2.3Round 5LIANHUA184♠♣A-1-5
-2.5Round 4HAPPY BRIDGE92♦♠Q-1+0
-2.5Round 9TONGJI UNIVERSITY223♠♣3+1-6
-2.6Round 8RIGHT CALL204♠♥5=+0
-2.7Round 4HAPPY BRIDGE54♥♥4-2+0
-3.0Round 1HOFFMAN62N♠8-1-4
-3.1Round 9TONGJI UNIVERSITY264♠♣6-1-6
-3.3Round 3NINGBOYONGGUAN303N♣9=+6
-3.3Round 13SHANGHAI GOODWAY24♥♠6=+1
-3.4Round 2SCTT193N♠6-1-5
-3.4Round 8RIGHT CALL123N♥10-2-6
-3.5Round 10YANAGISAWA25♦♥K=+0
-3.7Round 9TONGJI UNIVERSITY213N♦J=-5
-3.7Round 10YANAGISAWA41N♦2=+0
-3.9Round 15SHANGHAI KEJU233N♥Q-2-7
-4.0Round 2SCTT133Nx♦2-1-8
-4.2Round 5LIANHUA192♠♥3+1-6
-4.4Round 15SHANGHAI KEJU256♠♣2-1-16
-4.8Round 8RIGHT CALL193N♦Q-2-7
-4.8Round 13SHANGHAI GOODWAY103N♥K-1-6
-4.8Round 15SHANGHAI KEJU304♥♠10=+2
-5.2Round 10YANAGISAWA94♥♠2=-8
-5.3Round 8RIGHT CALL113N♥3-1-8
-5.4Round 12O'ROURKE243♠♣7=+0
-5.5Round 15SHANGHAI KEJU261N♠4-3-4
-5.7Round 5LIANHUA133N♠2+1-5
-5.9Round 1HOFFMAN74♥♣K=+1
-6.6Round 10YANAGISAWA104♠♣5-2-8
-6.9Round 1HOFFMAN83N♠5+1-8
-7.1Round 2SCTT146♦♠4+1+15
-7.1Round 3NINGBOYONGGUAN284♥♠7+1-6
-7.6Round 12O'ROURKE284♠♦K-1-11
-7.9Round 13SHANGHAI GOODWAY94♥x♠A-2-8
-8.7Round 7PEKING UNIVERSITY85♦x♦8=-6
-8.9Round 4HAPPY BRIDGE33♣♥Q+1-11
-8.9Round 12O'ROURKE304♥♥7=-7
-10.1Round 15SHANGHAI KEJU225♥x♠A-5-12
-10.3Round 8RIGHT CALL154♥♠J=-10
-15.1Round 3NINGBOYONGGUAN232♥x♣A=-16