CHEN M. Z. · ZHANG

305rank
+15.1Butler · 120 bds
+0.13per board
±4.9swing
-0.01vs par /bd · #327/672
-0.15adjusted /bd
Butler per round: 3.4 -11.6 11 -1.9 -6.6 -4.8 11.6 14.9 -2 -8.5 3.2 6.4by round

vs par split: bidding -0.72 · play +0.51

Strength of schedule: opponents averaged -0.27/bd (an easy draw) → opponent-adjusted -0.15/bd

Card play — on target: opening leads 77.8% #440 of 671 · declarer play 80.0% #258 of 671 · defence 91.9% #78 of 672

Card play by contract type — on target
vs NTvs a suit
Opening leads·77.8% (36)
Declarer play·80.0% (5)
Defence·91.9% (37)

Opening leads by suit led: ♠ 77.8% (9) · ♥ 77.8% (9) · ♦ 77.8% (9) · ♣ 77.8% (9)

vs par by strain: a suit -0.21 (79)

vs par by level: part-score +1.67 (24) · game +0.16 (45) · slam -6.40 (10)

By role: declaring +0.64/bd (-0.98 vs par · 67) · defending -0.53/bd (+1.23 vs par · 53)

By vulnerability: vulnerable -0.17/bd (-0.20 vs par · 61) · not vulnerable +0.43/bd (+0.19 vs par · 59)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 3R.ZhangM.Fukazawa – K.TakahashiOpen10+3.4+0.34-1.00
Round 5R.RongT.Sadek – A.HusseinClosed10-11.6-1.16-0.30
Round 6M.CaoC.Yu – Z.YanClosed10+11.0+1.10+0.10
Round 7R.ZhangY.Lu – H.YangClosed10-1.9-0.19+1.10
Round 8R.ZhangT.Aluf – A.GattenioClosed10-6.6-0.66-0.30
Round 9R.ZhangM.Zhou – M.ShengClosed10-4.8-0.48+0.00
Round 10R.ZhangS.Su – Y.WangClosed10+11.6+1.16+2.70
Round 11R.ZhangJ.Lin – Z.ChenOpen10+14.9+1.49+1.40
Round 12R.ZhangH.Humburg – G.MattssonClosed10-2.0-0.20-0.90
Round 13R.ZhangB.Shan – G.ShenOpen10-8.5-0.85-4.20
Round 14R.ZhangL.Li – L.SunClosed10+3.2+0.32+1.70
Round 15R.ZhangV.Kholomeev – A.VoronovClosed10+6.4+0.64-0.40

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
+11.8Round 9SHNT CLUB286♦♠A=+11
+11.2Round 11XIAMEN206♣♠4=-2
+10.5Round 14HUBEIXINYI CLUB146♠♦J-1+16
+9.8Round 6NINGBOYONGGUAN234♥♣5=+10
+9.8Round 10SII-06 STAR104♠♣5=+11
+9.8Round 14HUBEIXINYI CLUB164♠♣6-1+12
+9.1Round 15MOSCOW292♠♣A+2+10
+8.9Round 15MOSCOW261Nx♦6+1+11
+8.8Round 13SHANGHAI KEJU14♠♣6-1+10
+8.7Round 3NANIWADA292♥♠K-1+11
+8.3Round 6NINGBOYONGGUAN243N♠K=+7
+8.2Round 11XIAMEN111♠♥8=+11
+8.0Round 11XIAMEN123N♥2=-1
+7.1Round 15MOSCOW281N♣6+1+6
+6.9Round 3NANIWADA273N♥7+1+7
+6.5Round 12GERMANY SENIORS 1243N♥4=+11
+6.5Round 13SHANGHAI KEJU64♠♥3+1-11
+6.4Round 12GERMANY SENIORS 1213♠♥K+1+7
+6.3Round 3NANIWADA283N♠2+1+5
+4.8Round 13SHANGHAI KEJU103N♥K-1+6
+4.3Round 9SHNT CLUB213N♣8+1+5
+4.1Round 11XIAMEN183♠♣A=+6
+3.7Round 10SII-06 STAR42♠x♥3-1+7
+3.4Round 8MANT123N♣10-2+6
+3.3Round 3NANIWADA303N♣4=-6
+3.1Round 12GERMANY SENIORS 1304♥x♦A-1+6
+2.6Round 7CHEN21♥♠K-1+5
+2.6Round 8MANT204♠♥K=+0
+2.3Round 5HUSSEIN-CHAGAS184♠♣A-1+5
+2.3Round 10SII-06 STAR82♠♦A+1+6
+2.3Round 12GERMANY SENIORS 1264♥♣A-1+6
+2.1Round 6NINGBOYONGGUAN303N♥2-2+6
+2.0Round 9SHNT CLUB244♠x♥5-2+8
+1.9Round 5HUSSEIN-CHAGAS154♥♠K+1+11
+1.9Round 7CHEN74♠♥3-1+6
+1.9Round 8MANT151N♣6+2+0
+1.5Round 9SHNT CLUB273♦♥A-2-1
+1.5Round 13SHANGHAI KEJU53N♠6+3-12
+1.2Round 5HUSSEIN-CHAGAS161N♠6=+2
+1.2Round 11XIAMEN132♥♣4=+1
+1.1Round 8MANT162♠♥A+1+0
+1.0Round 6NINGBOYONGGUAN283N♥4+3+1
+0.8Round 7CHEN55♦♣K-1+3
+0.8Round 7CHEN94♥♦K+2-11
+0.8Round 10SII-06 STAR31N♥Q-2+1
+0.8Round 10SII-06 STAR95♦x♣10-2+0
+0.8Round 13SHANGHAI KEJU33N♥7+2+0
+0.7Round 9SHNT CLUB231N♥4=+1
+0.6Round 3NANIWADA212N♣10+1+0
+0.6Round 5HUSSEIN-CHAGAS204♠♣A=-1
+0.5Round 6NINGBOYONGGUAN292N♥6=+0
+0.5Round 10SII-06 STAR64♠♣A=+0
+0.5Round 14HUBEIXINYI CLUB191N♠J+1+6
+0.5Round 15MOSCOW241N♥2=+5
+0.3Round 10SII-06 STAR54♠♦9+2+11
+0.2Round 5HUSSEIN-CHAGAS121♠♣J+1+0
+0.2Round 7CHEN44♥♠9=+1
-0.0Round 13SHANGHAI KEJU94♠♠2+1+0
-0.1Round 7CHEN14♥♦7=-1
-0.1Round 14HUBEIXINYI CLUB112♠♣Q-1-4
-0.2Round 6NINGBOYONGGUAN274♥♦K-1-5
-0.2Round 10SII-06 STAR71N♦7=-9
-0.2Round 11XIAMEN194♠♥K=+0
-0.2Round 15MOSCOW224♠♥2+1-5
-0.4Round 13SHANGHAI KEJU74♥♠9=+1
-0.5Round 14HUBEIXINYI CLUB171N♠4+1+0
-0.7Round 7CHEN102♥♣Q+1+0
-0.8Round 12GERMANY SENIORS 1253N♥5+2-6
-0.9Round 7CHEN64♥♦Q+1+0
-0.9Round 8MANT135♠♠2+1-7
-1.0Round 8MANT142♠♥A-2+0
-1.1Round 6NINGBOYONGGUAN264♠♥Q=-5
-1.2Round 5HUSSEIN-CHAGAS172♠♣5-1+2
-1.2Round 15MOSCOW231N♥2-1-5
-1.3Round 5HUSSEIN-CHAGAS112♠♦A=-5
-1.3Round 11XIAMEN172N♣4-1-4
-1.5Round 6NINGBOYONGGUAN223♦♥Q-1+4
-1.5Round 7CHEN31N♣K-3+8
-1.5Round 8MANT173N♥7+1+5
-1.5Round 12GERMANY SENIORS 1292♠♦K-1+0
-1.5Round 14HUBEIXINYI CLUB135♠♣K=+5
-1.7Round 3NANIWADA252♣♠2-3-2
-1.9Round 9SHNT CLUB292N♥5-2-3
-2.2Round 14HUBEIXINYI CLUB124♥♠3-1-5
-2.3Round 3NANIWADA234♠♥2+1+0
-2.5Round 5HUSSEIN-CHAGAS194♣♠A=-1
-2.6Round 6NINGBOYONGGUAN253♥♥5-1-6
-2.7Round 9SHNT CLUB261N♣2+2+0
-2.7Round 15MOSCOW274♥♦7-1-5
-2.9Round 10SII-06 STAR11N♦K=+0
-3.1Round 12GERMANY SENIORS 1283N♣A-3-7
-3.2Round 5HUSSEIN-CHAGAS144♠♣7-1-4
-3.3Round 8MANT192N♦Q=-1
-3.3Round 12GERMANY SENIORS 1236♦♠A-2-8
-3.5Round 8MANT182♠♦Q+2-2
-3.5Round 10SII-06 STAR25♦♥K=+0
-3.5Round 11XIAMEN143N♠4+2+14
-3.6Round 12GERMANY SENIORS 1223N♥A-1-5
-3.7Round 14HUBEIXINYI CLUB204♠♦6+1-1
-4.2Round 3NANIWADA264♠♦Q=-8
-4.4Round 9SHNT CLUB304♠x♣K-1-6
-4.4Round 15MOSCOW256♠♥3-1-16
-4.5Round 3NANIWADA243N♠2-1-5
-4.6Round 13SHANGHAI KEJU44♠♥2+1+0
-4.7Round 11XIAMEN164♠♣9+1+0
-4.8Round 14HUBEIXINYI CLUB154♠♦A-2-3
-4.8Round 14HUBEIXINYI CLUB182♣♠A-1-9
-4.8Round 15MOSCOW304♥♠10=+2
-5.0Round 7CHEN85♥x♣A-2+0
-5.3Round 6NINGBOYONGGUAN216♥♣A-1-11
-5.4Round 8MANT113N♦J+2-4
-5.9Round 15MOSCOW214♠♦4=-7
-7.1Round 9SHNT CLUB224♠♣Q=-5
-7.7Round 13SHANGHAI KEJU87♠♠3-2-17
-8.0Round 12GERMANY SENIORS 1276♥♠A-2-13
-8.1Round 11XIAMEN154♠♠4+1-11
-9.0Round 9SHNT CLUB253N♦4=-10
-9.6Round 5HUSSEIN-CHAGAS136♣♠5-3-12
-9.7Round 3NANIWADA226♣♣4-1-12
-18.2Round 13SHANGHAI KEJU26Nx♦6-5-19