CHEN Yichao · WOLFSON

55rank
+65.9Butler · 84 bds
+0.78per board
±4.1swing
+1.49vs par /bd · #9/675
+1.18adjusted /bd
Butler per round: 8.8 11.9 8.6 28.7 -14.1 22by round

vs par split: bidding +1.14 · play +0.27

Strength of schedule: opponents averaged +0.40/bd (a tough draw) → opponent-adjusted +1.18/bd

Card play — on target: opening leads 73.9% #387 of 675 · declarer play 73.3% #412 of 675 · defence 90.2% #145 of 675

Bidding activity — not a pass: 37.5% #614 of 675 (90/240)

Card play by contract type — on target
vs NTvs a suit
Opening leads77.8% (9)71.4% (14)
Declarer play100.0% (6)55.6% (9)
Defence87.5% (16)91.4% (35)

Opening leads by suit led: ♠ 50.0% (4) · ♥ 80.0% (5) · ♦ 75.0% (8) · ♣ 83.3% (6)

vs par by strain: NT +1.79 (29) · a suit +1.33 (55)

vs par by level: part-score +0.15 (26) · game +2.62 (50) · slam -1.25 (8)

By role: declaring +0.46/bd (-1.85 vs par · 33) · defending +1.00/bd (+3.65 vs par · 51)

By vulnerability: vulnerable -0.29/bd (+1.09 vs par · 42) · not vulnerable +1.86/bd (+1.88 vs par · 42)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 2Y.LiuC.Hui – J.ChiangClosed14+8.8+0.63+3.57
Round 3Y.LiuC.Teodorescu – M.IonitaClosed14+11.9+0.85+1.43
Round 4Y.LiuW.Ho – G.HoClosed14+8.6+0.61+0.93
Round 6Y.LiuB.Norton – S.TommasiniOpen14+28.7+2.05+0.64
Round 7Y.LiuM.Dabrowski – J.StachOpen14-14.1-1.01-0.71
Round 8Y.LiuE.Morawska – A.JaroszClosed14+22.0+1.57+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
+11.7Round 4HOBRA184♥♦K-1+16
+11.1Round 2RILAKKUMA193NTx♦8-3+14
+9.7Round 3CONTRA117♣♣3=+0
+9.6Round 8PKB INTERNATIONAL245♥♣T-1+11
+7.8Round 6KNOTTENBELT176♠x♦K-3+5
+7.3Round 8PKB INTERNATIONAL287♠♥2=+0
+6.1Round 2RILAKKUMA213NT♠5=+6
+5.4Round 6KNOTTENBELT155♦x♣9-1+0
+4.7Round 4HOBRA212♠♥2-2+3
+4.5Round 2RILAKKUMA173♠-2+8
+4.5Round 2RILAKKUMA206♥♣5-1+13
+4.5Round 8PKB INTERNATIONAL273NT♦T-2+9
+4.4Round 3CONTRA24♠♦2-2+12
+4.3Round 3CONTRA83NT♣T-4+3
+4.0Round 7JULIAN MIGLANC62♠♣K-1+5
+3.6Round 4HOBRA233NT♦T-1+12
+3.6Round 4HOBRA251NT♥Q=+6
+3.4Round 6KNOTTENBELT165♣♦K=-5
+3.4Round 7JULIAN MIGLANC44♠♣A-1+12
+3.3Round 2RILAKKUMA274♠♥6-1+5
+3.3Round 6KNOTTENBELT184♥♠5+1-11
+3.3Round 6KNOTTENBELT241NT♦2+2+6
+3.1Round 2RILAKKUMA242♦♦5+3+2
+3.1Round 7JULIAN MIGLANC115♣♥K-1+5
+3.1Round 8PKB INTERNATIONAL174♥x♥8-2+11
+2.9Round 8PKB INTERNATIONAL195♦♦8-1+5
+2.7Round 3CONTRA44♠♥A-2+2
+2.5Round 4HOBRA244♠♣6-1+10
+2.5Round 8PKB INTERNATIONAL252♥♦9-1+4
+2.3Round 4HOBRA223♦♣A-1+4
+2.2Round 7JULIAN MIGLANC83NT♥9-1+5
+2.1Round 8PKB INTERNATIONAL224♠♦T=+0
+1.9Round 6KNOTTENBELT215♣♠2-2+2
+1.9Round 6KNOTTENBELT273NT♥6+1+10
+1.8Round 3CONTRA71NT♦J+1+1
+1.8Round 6KNOTTENBELT201♠♥8+2-10
+1.3Round 6KNOTTENBELT223NT♥3=+2
+1.2Round 7JULIAN MIGLANC34♠♦J-1-2
+1.0Round 4HOBRA153NT♠J=-1
+0.9Round 3CONTRA65♦x♣A-2+0
+0.8Round 4HOBRA273NT♠J=+0
+0.8Round 6KNOTTENBELT233NT♣Q+2+0
+0.8Round 8PKB INTERNATIONAL164♥♣K+2+11
+0.5Round 6KNOTTENBELT263♦♥3+2+8
+0.3Round 2RILAKKUMA153NT♠2=+1
+0.3Round 6KNOTTENBELT193NT♠2+1+0
+0.2Round 3CONTRA34♥♦3+1+11
+0.1Round 3CONTRA93NT♠Q-2-8
-0.0Round 4HOBRA285♥x♠A-2+2
+0.0Round 8PKB INTERNATIONAL153♥♥2-1+0
-0.1Round 6KNOTTENBELT281NT♥2-1+2
-0.2Round 7JULIAN MIGLANC14♠♥6+1+0
-0.2Round 8PKB INTERNATIONAL232♠♣J+2-1
-0.3Round 2RILAKKUMA255♥♠8=+0
-0.5Round 2RILAKKUMA283NT♥2=-1
-0.7Round 7JULIAN MIGLANC52♠♥2=-1
-1.0Round 2RILAKKUMA181♦♠2=+1
-1.0Round 3CONTRA13NT♣Q=+0
-1.1Round 7JULIAN MIGLANC144♠x♦5-2-4
-1.4Round 3CONTRA144♥♦A=-3
-1.5Round 3CONTRA101NT♠A-3+7
-1.7Round 2RILAKKUMA235♣♥K+1+10
-1.8Round 3CONTRA123♦♣6-2-5
-1.9Round 8PKB INTERNATIONAL182NT♣T-1-4
-2.0Round 2RILAKKUMA162♥♦J+1-6
-2.1Round 7JULIAN MIGLANC123NT♠J=+1
-2.2Round 4HOBRA163NT♣2+2-1
-2.7Round 7JULIAN MIGLANC132♥♣A+2+1
-2.7Round 8PKB INTERNATIONAL203NT♣9+2+0
-2.8Round 3CONTRA53NT♠3=+1
-2.9Round 6KNOTTENBELT252NT♥3=+0
-3.0Round 8PKB INTERNATIONAL214♠♥T=-3
-3.0Round 8PKB INTERNATIONAL264♥♣7+1+0
-3.1Round 7JULIAN MIGLANC102♦♣J+2-11
-3.6Round 7JULIAN MIGLANC93NT♠2-2-7
-3.7Round 3CONTRA133♥♦A=-1
-3.7Round 4HOBRA202♥♠A-3-5
-4.3Round 4HOBRA263♣♥4+1-10
-5.4Round 4HOBRA193NT♣5-1-12
-6.0Round 4HOBRA176♣♥K-1-11
-6.3Round 7JULIAN MIGLANC74♥♠K+1+0
-7.5Round 2RILAKKUMA227♣♦2=+2
-8.2Round 7JULIAN MIGLANC26♣♥J-1-14
-11.1Round 2RILAKKUMA266♠x♥K-3-5