QIN Feng · PEKING UNIVERSITY

387rank
-0.7Butler · 50 bds
-0.01per board
±3.9swing
+0.66vs par /bd
+0.05adjusted /bd
Butler per round: -1.7 3.9 2.7 9.4 -15by round

vs par split: bidding -0.58 · play +0.94

Strength of schedule: opponents averaged +0.06/bd (a tough draw) → opponent-adjusted +0.05/bd

Card play — on target: opening leads 83.3% · declarer play 87.5% · defence 84.6%

Card play by contract type — on target
vs NTvs a suit
Opening leads·83.3% (6)
Declarer play·87.5% (8)
Defence·84.6% (13)

Opening leads by suit led: ♦ 100.0% (2) · ♣ 75.0% (4)

vs par by strain: a suit +0.35 (31)

vs par by level: part-score +0.95 (19) · game +0.60 (10) · slam -6.50 (2)

By role: declaring -0.40/bd (-1.64 vs par · 28) · defending +0.47/bd (+3.59 vs par · 22)

By vulnerability: vulnerable +0.99/bd (+2.35 vs par · 29) · not vulnerable -1.41/bd (-1.67 vs par · 21)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 2Y.LiuP.Silabhusiddhi – P.NimityongskulOpen10-1.7-0.17+3.20
Round 3Y.LiuM.Barel – Y.ZackClosed10+3.9+0.39+2.00
Round 4C.WangY.Lian – X.FuClosed10+2.7+0.27+0.40
Round 5C.WangS.Zhang – S.ZhangClosed10+9.4+0.94+0.40
Round 6C.WangZ.Lu – D.ShenOpen10-15.0-1.50-2.70

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
+11.2Round 3HERBST274♠x♠2=+12
+11.0Round 2TSEP122♦x♣4-3+12
+6.4Round 5TRIJET156♦♠K=-2
+4.7Round 4PUDONGPUFA CLUB84♠x♠8-1+6
+4.5Round 3HERBST243N♥4-1+5
+4.3Round 5TRIJET161Nx♠5-2+4
+3.8Round 2TSEP133♥♣4=+0
+3.7Round 3HERBST265♣♦K=+7
+3.5Round 4PUDONGPUFA CLUB14♣♥K+1+2
+3.2Round 5TRIJET143♦♦8-1+4
+2.7Round 5TRIJET133♣♥J+1+7
+2.6Round 5TRIJET193♥♠2=+1
+2.4Round 4PUDONGPUFA CLUB33N♥9+2+0
+2.3Round 3HERBST234♠♦J+1+0
+2.1Round 4PUDONGPUFA CLUB42♠♣Q+2+10
+1.9Round 2TSEP143N♠3+4+17
+1.7Round 2TSEP203N♠4+1+13
+1.2Round 5TRIJET172♠♦10-1-2
+1.0Round 6ZHEJIANG ZHENGYUAN292♣♥J-1+1
+0.5Round 3HERBST293N♥K=-2
+0.4Round 3HERBST212♠♦3=+1
+0.4Round 4PUDONGPUFA CLUB63♠♣10+2-10
+0.4Round 6ZHEJIANG ZHENGYUAN303N♥2-1+5
+0.2Round 6ZHEJIANG ZHENGYUAN222♠♦K=+5
+0.0Round 6ZHEJIANG ZHENGYUAN284N♣K+1+0
-0.1Round 4PUDONGPUFA CLUB23N♦3+1+0
-0.2Round 6ZHEJIANG ZHENGYUAN274♥♠3-1-5
-0.6Round 5TRIJET204♠♣A=+1
-0.9Round 2TSEP154♠♦5=+1
-1.0Round 4PUDONGPUFA CLUB51N♠4-1+1
-1.1Round 6ZHEJIANG ZHENGYUAN264♠♦Q=-5
-1.8Round 6ZHEJIANG ZHENGYUAN242N♠K-1-5
-1.9Round 2TSEP112N♥10=+0
-1.9Round 4PUDONGPUFA CLUB102♠♣J-1+1
-2.3Round 5TRIJET184♠♣A-1-5
-2.5Round 4PUDONGPUFA CLUB91♠♣8+1+0
-2.6Round 2TSEP163N♠J-1-4
-2.6Round 3HERBST223N♠2+3+3
-2.8Round 6ZHEJIANG ZHENGYUAN253♦♥A=-6
-2.9Round 5TRIJET112♠♦A-1+2
-3.3Round 3HERBST303N♣9=+6
-4.4Round 2TSEP182N♠6-2-3
-4.6Round 2TSEP194♠♣K-2-6
-4.9Round 4PUDONGPUFA CLUB73N♥2-1-6
-5.2Round 5TRIJET122♦♣J-2-6
-5.3Round 6ZHEJIANG ZHENGYUAN216♥♣A-1-11
-5.4Round 6ZHEJIANG ZHENGYUAN233♥♠7-1-6
-5.7Round 2TSEP174♦♦4+1+2
-6.3Round 3HERBST283N♠3+1-5
-6.5Round 3HERBST253N♥9-2-7