CHEN Yichao · WOLFSON

38rank
+24.7Butler · 84 bds
+0.29per board
±3.7swing
+1.33vs par /bd · #6/107
+0.43adjusted /bd
Butler per round: 9.6 9.4 2.2 11.6 -20.1 12by round

vs par split: bidding +0.81 · play +0.52

Strength of schedule: opponents averaged +0.13/bd (a tough draw) → opponent-adjusted +0.43/bd

Card play — on target: opening leads 90.5% #16 of 107 · declarer play 86.2% #10 of 107 · defence 91.4% #20 of 107

Bidding activity — not a pass: 50.4% #16 of 107 (121/240)

Card play by contract type — on target
vs NTvs a suit
Opening leads80.0% (5)93.8% (16)
Declarer play81.8% (11)88.9% (18)
Defence80.0% (10)96.0% (25)

Opening leads by suit led: ♠ 100.0% (4) · ♥ 71.4% (7) · ♦ 100.0% (5) · ♣ 100.0% (5)

vs par by strain: NT +2.19 (27) · a suit +0.93 (57)

vs par by level: part-score +1.39 (33) · game +1.82 (45) · slam -2.67 (6)

By role: declaring -0.02/bd (-1.39 vs par · 49) · defending +0.73/bd (+5.14 vs par · 35)

By vulnerability: vulnerable +0.11/bd (+0.98 vs par · 42) · not vulnerable +0.48/bd (+1.69 vs par · 42)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 2Y.LiuF.Multon – P.ZimmermannOpen14+9.6+0.69+2.36
Round 3Y.LiuM.Michielsen – P.CullinOpen14+9.4+0.67+3.14
Round 4Y.LiuF.Porta – L.CimaClosed14+2.2+0.16+1.93
Round 6Y.LiuJ.Hurd – K.BathurstOpen14+11.6+0.83-0.71
Round 7Y.LiuW.Starkowski – M.KwiecienOpen14-20.1-1.44+0.93
Round 8Y.LiuE.Rodwell – D.SimsonOpen14+12.0+0.86+0.36

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
+9.5Round 8SIMSON204♠♦J=-1
+7.4Round 2ZIMMERMANN283NT♠T-1+12
+6.4Round 4BIANCHI213NT♦3=+0
+5.7Round 8SIMSON285♦x♠K-1+8
+5.5Round 6SILVER SURFERS243NT♥Q-2+11
+5.5Round 8SIMSON162♥♠4+1+6
+5.2Round 2ZIMMERMANN171NT♥4-3+7
+5.2Round 3SAXENA52NT♠2-1+5
+5.0Round 4BIANCHI223NT♥7+2+11
+4.9Round 6SILVER SURFERS223♠♥T+1+7
+4.7Round 8SIMSON221NTx♥T-1+5
+4.0Round 3SAXENA103♥♠A-2+9
+4.0Round 4BIANCHI164♠♥K-1+5
+3.6Round 2ZIMMERMANN193NT♥5=+0
+3.6Round 6SILVER SURFERS151NT♦4=+12
+3.6Round 6SILVER SURFERS273NT♣5-1+5
+3.5Round 3SAXENA84♣♠7+1+6
+3.4Round 3SAXENA114♠♥A+2+11
+3.4Round 8SIMSON152♠♥Q=+5
+3.3Round 8SIMSON242♣♠T+1+5
+3.2Round 6SILVER SURFERS206♥♥8=-13
+3.1Round 7PIONEERS42♠♥7+1+7
+2.3Round 2ZIMMERMANN251♦♠T+2+7
+2.2Round 6SILVER SURFERS262♠♥9+2-10
+2.1Round 7PIONEERS111NT♠6=+5
+2.0Round 3SAXENA24♠♦T+1+16
+1.8Round 7PIONEERS54♥♣9+2+1
+1.7Round 7PIONEERS61NT♣8+1+1
+1.6Round 2ZIMMERMANN152♠♠8=+0
+1.6Round 4BIANCHI203NT♥5-2+8
+1.6Round 6SILVER SURFERS211NT♥5=-1
+1.6Round 6SILVER SURFERS234♥♣3+1+0
+1.4Round 3SAXENA14♥♦Q=+0
+1.2Round 2ZIMMERMANN234♠♣Q+2+13
+1.2Round 3SAXENA94♦♥A-1+4
+1.2Round 4BIANCHI242♦♥6-1+8
+1.1Round 6SILVER SURFERS186NT♠8=-11
+0.9Round 2ZIMMERMANN264♠♠J+2+1
+0.8Round 8SIMSON264♠x♥7-2+3
+0.6Round 6SILVER SURFERS163NT♥4+1+0
+0.6Round 6SILVER SURFERS253NT♥7=+10
+0.3Round 3SAXENA74♠♦Q=+13
+0.3Round 7PIONEERS73NT♠3=+1
+0.2Round 2ZIMMERMANN214♥♠A-1+6
+0.2Round 4BIANCHI173NT♦3+1+0
+0.1Round 4BIANCHI282♥x♥8-1+0
-0.0Round 8SIMSON273NT♠4+2-11
-0.1Round 7PIONEERS143NT♦Q=+0
-0.2Round 2ZIMMERMANN243♠♦9-1-2
-0.3Round 2ZIMMERMANN164♥♣T=+0
-0.7Round 2ZIMMERMANN184♦x♦K-2-5
-0.7Round 3SAXENA43NT♠J=+0
-0.8Round 4BIANCHI253NT♥A=+0
-0.8Round 7PIONEERS36♣♥7=+13
-0.9Round 4BIANCHI184♠♥A=+0
-1.1Round 3SAXENA143♠♦A=+0
-1.3Round 8SIMSON176♣♥4=+0
-1.4Round 4BIANCHI266♥♠A=+0
-1.4Round 7PIONEERS93♣♥2+1-7
-1.5Round 8SIMSON217♦x♥K-3-5
-1.7Round 3SAXENA134♥♣5-1-12
-1.8Round 7PIONEERS23♣♥4+1+7
-1.9Round 8SIMSON193NT♥2=+11
-2.0Round 3SAXENA32♠♥K-1+1
-2.0Round 8SIMSON184♦♠Q-1-4
-2.2Round 4BIANCHI155♦♣K+1+13
-2.4Round 7PIONEERS14♥♣2=+0
-2.4Round 7PIONEERS122♠♥3-1-5
-2.5Round 3SAXENA64♠♦2-2-3
-2.5Round 6SILVER SURFERS192NT♦3-1-5
-2.7Round 4BIANCHI234♥♦5=-3
-2.9Round 7PIONEERS103♣♠9-1-5
-3.0Round 2ZIMMERMANN222♥♣4=-6
-3.5Round 2ZIMMERMANN204♠♦A+1+0
-3.6Round 3SAXENA122♥♠A=-6
-3.8Round 4BIANCHI194♥♣A-1-9
-4.5Round 4BIANCHI274♠x♣K-1-6
-4.6Round 6SILVER SURFERS284♥♦2+2-11
-5.1Round 2ZIMMERMANN274♠x♣Q-2+0
-6.0Round 8SIMSON253NT♦3-1-6
-7.1Round 7PIONEERS81♠x♥A-2-5
-8.2Round 8SIMSON233NT♣7-4-11
-9.8Round 6SILVER SURFERS175♠♣5-1-4
-10.2Round 7PIONEERS135♣♦5=+0