CHEN Jun · WEST VIP

10rank
+48.1Butler · 42 bds
+1.15per board
±5.7swing
+1.86vs par /bd · #8/208
+0.39adjusted /bd
Butler per round: 20.6 -1.4 -3.9 -34.1 50 16.9by round

vs par split: bidding +0.38 · play +1.48

Strength of schedule: opponents averaged -0.76/bd (an easy draw) → opponent-adjusted +0.39/bd

Card play — on target: opening leads 64.3% #165 of 207 · declarer play 100.0% #1 of 206 · defence 90.9% #46 of 208

Card play by contract type — on target
vs NTvs a suit
Opening leads60.0% (5)66.7% (9)
Declarer play100.0% (1)100.0% (8)
Defence71.4% (7)100.0% (15)

Opening leads by suit led: ♠ 66.7% (3) · ♥ 66.7% (3) · ♦ 100.0% (3) · ♣ 40.0% (5)

vs par by strain: NT +3.00 (10) · a suit +1.50 (32)

vs par by level: part-score +2.40 (10) · game +1.74 (31) · slam +0.00 (1)

By role: declaring +1.70/bd (+0.05 vs par · 20) · defending +0.64/bd (+3.50 vs par · 22)

By vulnerability: vulnerable +0.81/bd (+2.75 vs par · 20) · not vulnerable +1.46/bd (+1.04 vs par · 22)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 2Y.ZhangX.Li – M.LiClosed7+20.6+2.94+1.57
Round 3Y.ZhangB.Shi – W.TianOpen7-1.4-0.20+2.71
Round 4Y.ZhangJ.Cong – Y.QinOpen7-3.9-0.56+0.57
Round 5Y.ZhangJ.Rosenfeld – J.GuOpen7-34.1-4.87-2.14
Round 7Y.HeH.Yang – Y.LiOpen7+50.0+7.14+7.29
Round 8Y.HeZ.Liao – Z.LuoClosed7+16.9+2.41+1.14

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 2SHANDONGPUSHI TEAM84♠x♦A=+12
+12.5Round 2SHANDONGPUSHI TEAM91NTxx♣Q-2+13
+11.0Round 7SANSHA SATELLITE TV204♥♦4-1+13
+9.6Round 7SANSHA SATELLITE TV174♠♦10-1+11
+9.4Round 7SANSHA SATELLITE TV214♠♥A=+11
+8.0Round 4BEIJING CENTURY WEIDA263♦♣K=+14
+7.5Round 7SANSHA SATELLITE TV153♠♣5-2+11
+5.6Round 8ZHIHAOLE264♠♥Q=+0
+4.6Round 7SANSHA SATELLITE TV184♠♦3+1+0
+4.6Round 7SANSHA SATELLITE TV194♠♦6-1+5
+4.6Round 8ZHIHAOLE253NT♥10+3+1
+4.3Round 8ZHIHAOLE244♥♦8=+0
+3.9Round 3NT FEIXIANG154♠♦Q-1+6
+3.9Round 3NT FEIXIANG183NT♣7-1+13
+3.4Round 8ZHIHAOLE284♥♣Q-1+5
+3.3Round 7SANSHA SATELLITE TV164♠♣3=+0
+2.3Round 2SHANDONGPUSHI TEAM114♥♦A+1+0
+2.0Round 4BEIJING CENTURY WEIDA253NT♠2-1+6
+1.5Round 3NT FEIXIANG214♥♣2+1+0
+1.4Round 4BEIJING CENTURY WEIDA233NT♥10=+0
+1.1Round 3NT FEIXIANG203NT♦Q=+2
+1.1Round 4BEIJING CENTURY WEIDA225♠♦A=+0
+0.9Round 8ZHIHAOLE224♥♥2+1+0
+0.5Round 8ZHIHAOLE233NT♠2+2+2
+0.4Round 2SHANDONGPUSHI TEAM144♠♥Q+3-14
+0.1Round 5PANDA22♣♦4+1+0
-0.5Round 5PANDA33♠♥2=+0
-1.8Round 3NT FEIXIANG193NT♣4=+0
-2.0Round 5PANDA44♠♦K+1+0
-2.2Round 2SHANDONGPUSHI TEAM134♠♣J+1+0
-2.3Round 4BEIJING CENTURY WEIDA242NT♠J+1-2
-2.4Round 2SHANDONGPUSHI TEAM104♠♦7+1+0
-2.4Round 8ZHIHAOLE274♠♥4=+0
-2.6Round 2SHANDONGPUSHI TEAM124♥♣7=+0
-3.3Round 3NT FEIXIANG163♦♠4+1+7
-3.7Round 5PANDA51NT♠4=-5
-4.3Round 4BEIJING CENTURY WEIDA282♣♠8-1-5
-5.8Round 5PANDA15♥x♦A-3-2
-6.7Round 3NT FEIXIANG175♦x♠5-3-9
-8.0Round 5PANDA64♥♦K=-8
-9.8Round 4BEIJING CENTURY WEIDA273♦x♣A-3-9
-14.2Round 5PANDA76♠♥4=+0