CHEN Jien · CHINA OPEN TEAM 1

2rank
+90.6Butler · 70 bds
+1.29per board
±4.9swing
+1.01vs par /bd · #10/107
+1.22adjusted /bd
Butler per round: 21.7 46.9 -9.8 37.7 -5.9by round

vs par split: bidding +0.41 · play +0.60

Strength of schedule: opponents averaged -0.08/bd (an easy draw) → opponent-adjusted +1.22/bd

Card play — on target: opening leads 71.4% #96 of 107 · declarer play 88.2% #4 of 107 · defence 87.2% #59 of 107

Bidding activity — not a pass: 41.7% #62 of 107 (90/216)

Card play by contract type — on target
vs NTvs a suit
Opening leads50.0% (2)75.0% (12)
Declarer play66.7% (3)92.9% (14)
Defence90.0% (10)86.2% (29)

Opening leads by suit led: ♠ 33.3% (3) · ♥ 60.0% (5) · ♦ 100.0% (2) · ♣ 100.0% (4)

vs par by strain: NT +2.83 (18) · a suit +0.39 (52)

vs par by level: part-score +0.16 (25) · game +1.38 (40) · slam +2.40 (5)

By role: declaring -0.47/bd (-3.03 vs par · 31) · defending +2.69/bd (+4.23 vs par · 39)

By vulnerability: vulnerable +1.02/bd (+1.03 vs par · 35) · not vulnerable +1.57/bd (+1.00 vs par · 35)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 2Y.CaiA.Zamir – O.ToledanoOpen14+21.7+1.55-0.29
Round 3Y.CaiA.Jarosz – E.MorawskaClosed14+46.9+3.35+5.21
Round 4Y.CaiO.Rimstedt – M.RimstedtClosed14-9.8-0.70+0.64
Round 6Y.CaiJ.Shi – J.WangOpen14+37.7+2.69+2.57
Round 7Y.CaiJ.Wooldridge – D.GraingerOpen14-5.9-0.42-3.07

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
+12.1Round 3PKB INTERNATIONAL43NT♠J-1+12
+12.1Round 3PKB INTERNATIONAL117♠♥A-1+14
+11.2Round 7SIMSON63♣x♠3-3+11
+10.2Round 7SIMSON135♣♦3=+0
+9.4Round 6HOBRA204♥♣2+3+17
+9.1Round 6HOBRA252NT♣7+1-1
+8.9Round 4LEBOWITZ153NT♣K-1+17
+8.7Round 2EASY STREET193NT♦Q-1+12
+8.7Round 6HOBRA275♣x♥7-3+8
+8.3Round 2EASY STREET244♥x♠A-2+9
+7.1Round 3PKB INTERNATIONAL95♦x♥Q-2+9
+6.6Round 3PKB INTERNATIONAL101NT♥5=+11
+5.3Round 2EASY STREET184♦x♥T-3+9
+5.1Round 2EASY STREET274♠x♣Q-2+0
+4.9Round 2EASY STREET283NT♥9=-1
+4.9Round 6HOBRA264♥♣2-1+12
+4.6Round 6HOBRA284♥♦J+2+11
+4.3Round 3PKB INTERNATIONAL144♠♣A-1+5
+4.2Round 4LEBOWITZ283NT♥3-1+5
+3.7Round 4LEBOWITZ244♣♦K-1+10
+3.5Round 2EASY STREET204♠♦A+1+0
+3.5Round 3PKB INTERNATIONAL83♣♠A+2+6
+3.1Round 3PKB INTERNATIONAL132♥♦4=-10
+3.1Round 6HOBRA153♦♣K+2-10
+2.6Round 6HOBRA223♦♠9+1+0
+2.3Round 6HOBRA212NT♠J-1+4
+2.1Round 2EASY STREET174♥♦5+1+0
+2.0Round 7SIMSON111NT♠3-1-2
+1.7Round 7SIMSON73NT♥4+2+1
+1.5Round 3PKB INTERNATIONAL121NT♥A=-1
+1.5Round 7SIMSON36♣♦6+1-13
+1.4Round 3PKB INTERNATIONAL14♥♣4=+0
+0.9Round 7SIMSON24♥♣A-1-7
+0.7Round 4LEBOWITZ272♠♣2=-1
+0.4Round 6HOBRA244♣♠Q=-7
+0.3Round 2EASY STREET164♥♣J=+0
+0.3Round 3PKB INTERNATIONAL74♠♦T=+13
+0.2Round 4LEBOWITZ173NT♦3+1+0
-0.0Round 3PKB INTERNATIONAL53♦♠T=+0
-0.0Round 4LEBOWITZ203♥♣A=+7
-0.4Round 2EASY STREET252♠♦3+2-6
-0.6Round 3PKB INTERNATIONAL25♣x♦Q-4+16
-0.6Round 6HOBRA164♠♦3=+0
-0.6Round 6HOBRA174♠♣5=-8
-0.8Round 4LEBOWITZ183NT♥K+1+0
-0.8Round 4LEBOWITZ253NT♦3=+0
-0.9Round 2EASY STREET264♠♠J+2-1
-1.1Round 6HOBRA186NT♠8=+11
-1.2Round 2EASY STREET234♠♣Q+2-13
-1.4Round 4LEBOWITZ266♥♠3=+0
-1.6Round 2EASY STREET152♠♠3=+0
-1.8Round 7SIMSON54♥♣T+2-1
-2.0Round 3PKB INTERNATIONAL32♠♥K-1+1
-2.0Round 7SIMSON143NT♥3+2-2
-2.1Round 7SIMSON42♠♥2=-6
-2.4Round 7SIMSON83NT♥T-2-5
-2.5Round 3PKB INTERNATIONAL64♠♦4-2-3
-2.5Round 6HOBRA234♥♣7+2-1
-2.6Round 6HOBRA192♠♦7-2+0
-2.7Round 4LEBOWITZ234♥♠3=-3
-3.4Round 7SIMSON103♣♦3+1-1
-3.6Round 2EASY STREET223♦♥J+1-1
-3.6Round 7SIMSON13♥♠6+1-6
-3.8Round 4LEBOWITZ194♥♣A-1-9
-4.0Round 4LEBOWITZ213NT♦3-1-10
-6.9Round 4LEBOWITZ226♠♥7=+0
-7.1Round 4LEBOWITZ164♠♠K=-7
-7.4Round 7SIMSON92♥x♦3-2-3
-8.8Round 2EASY STREET215♥x♠A-2-12
-10.7Round 7SIMSON125♣x♠T-3-9