BERKOWITZ David · GORDON

1rank
+81.6Butler · 112 bds
+0.73per board
±4.4swing
+0.18vs par /bd · #9/17
+0.96adjusted /bd
Butler per round: 38.6 38.6 10.1 10.1 10.1 32.9 32.9by round

vs par split: bidding +0.55 · play -0.35

Strength of schedule: opponents averaged +0.23/bd (a tough draw) → opponent-adjusted +0.96/bd

Card play — on target: opening leads 77.8% #13 of 17 · declarer play 70.0% #13 of 17 · defence 88.5% #12 of 17

Card play by contract type — on target
vs NTvs a suit
Opening leads66.7% (6)81.0% (21)
Declarer play44.4% (9)81.0% (21)
Defence63.6% (11)95.1% (41)

Opening leads by suit led: ♠ 100.0% (4) · ♥ 80.0% (10) · ♦ 66.7% (9) · ♣ 75.0% (4)

vs par by strain: NT -1.33 (27) · a suit +0.66 (85)

vs par by level: part-score -0.70 (37) · game +0.71 (59) · slam +0.25 (16)

By role: declaring +0.85/bd (-1.47 vs par · 57) · defending +0.60/bd (+1.89 vs par · 55)

By vulnerability: vulnerable +0.23/bd (+0.04 vs par · 56) · not vulnerable +1.23/bd (+0.32 vs par · 56)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
QuarterfinalA.SontagM.Klukowski – P.ZatorskiOpen16+13.9+0.87+1.50
QuarterfinalA.SontagM.Klukowski – P.ZatorskiOpen16+24.7+1.54+1.75
SemifinalA.SontagM.Ticha – R.RitmeijerClosed16+4.3+0.27-2.25
SemifinalA.SontagM.Ticha – R.RitmeijerClosed16+15.0+0.94-0.88
SemifinalA.SontagJ.Jansma – G.PaulissenClosed16-9.2-0.57+0.25
FinalA.SontagZ.Shao – Z.ZhuangClosed16+21.9+1.37+0.50
FinalA.SontagZ.Shao – Z.ZhuangOpen16+11.0+0.69+0.38

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
+12.0SemifinalWHITE HOUSE224♠♥T-1+12
+11.7SemifinalWHITE HOUSE455♦x♠J-2+0
+11.0SemifinalWHITE HOUSE97♦♠2=+0
+11.0FinalSAIC VW284♠♥K+2+11
+10.0FinalSAIC VW464♠♣6+3+14
+9.1QuarterfinalPOLISH STUDENTS487♥♦8=+0
+8.3SemifinalWHITE HOUSE116♠♦4=+0
+8.0QuarterfinalPOLISH STUDENTS416♣♦J=+10
+7.4QuarterfinalPOLISH STUDENTS323NT-4+11
+7.0FinalSAIC VW215♥x♣J-2+5
+7.0FinalSAIC VW244♠♦2-1+4
+7.0FinalSAIC VW271NTx♣2=+8
+6.6QuarterfinalPOLISH STUDENTS454♠♦Q-1-3
+6.0FinalSAIC VW403♠♥8=+0
+5.3QuarterfinalPOLISH STUDENTS211NT♠T+1+0
+5.0SemifinalWHITE HOUSE325♦=+5
+5.0FinalSAIC VW392♠♥T=+0
+4.6QuarterfinalPOLISH STUDENTS346♥♣5-1+11
+4.3SemifinalWHITE HOUSE43NT♥7=+0
+4.3FinalSAIC VW324♠♣4+1+6
+4.1QuarterfinalPOLISH STUDENTS374♦♦8=+7
+4.0QuarterfinalPOLISH STUDENTS242♠♥5+1+1
+4.0SemifinalWHITE HOUSE244♥♠3+2+11
+3.7SemifinalWHITE HOUSE354♥♦A+1+0
+3.3FinalSAIC VW313NT♥K=-1
+3.1QuarterfinalPOLISH STUDENTS264♠x♠8-1+13
+3.1QuarterfinalPOLISH STUDENTS466♠♦5-1+11
+3.0QuarterfinalPOLISH STUDENTS472♠♥7+2+1
+3.0SemifinalWHITE HOUSE82NT♦3-1+4
+3.0SemifinalWHITE HOUSE132♠♦K=+0
+3.0SemifinalWHITE HOUSE475♦♣6+1+1
+2.9QuarterfinalPOLISH STUDENTS183♦♥9-1-2
+2.4QuarterfinalPOLISH STUDENTS222♠♥4=+0
+2.3SemifinalWHITE HOUSE273NT♣2=-1
+1.4QuarterfinalPOLISH STUDENTS422♥♠K=+9
+1.0QuarterfinalPOLISH STUDENTS254♠♣8-1+12
+1.0SemifinalWHITE HOUSE264♥♣K-1-6
+1.0SemifinalWHITE HOUSE293♠♣T=+1
+1.0SemifinalWHITE HOUSE483NT♥J+2+0
+1.0FinalSAIC VW234♥-1+6
+1.0FinalSAIC VW334♠♥2=+1
+1.0FinalSAIC VW366♥♥6+1+1
+1.0FinalSAIC VW444♠♥J-2+0
+1.0FinalSAIC VW471NT♠2+4-5
+0.7SemifinalWHITE HOUSE204♠♦A=+1
+0.7SemifinalWHITE HOUSE383NT♠A-1-5
+0.7SemifinalWHITE HOUSE393♠♥J=+0
+0.4QuarterfinalPOLISH STUDENTS331NT♠A=-1
+0.3QuarterfinalPOLISH STUDENTS314♠♦K+1+0
+0.3FinalSAIC VW264♠x♣3-2+7
+0.1QuarterfinalPOLISH STUDENTS284♥♣2+1+0
+0.0QuarterfinalPOLISH STUDENTS294♠♥A+1+0
+0.0SemifinalWHITE HOUSE34♠♥K=+0
+0.0SemifinalWHITE HOUSE54♥♠A-1-9
+0.0SemifinalWHITE HOUSE66♣♠T=+0
+0.0SemifinalWHITE HOUSE124♠♦5=+0
+0.0SemifinalWHITE HOUSE173NT♣2=-1
+0.0SemifinalWHITE HOUSE194♥♠J=+0
+0.0SemifinalWHITE HOUSE314♥♣T=+0
+0.0SemifinalWHITE HOUSE344♠♦T=+11
+0.0SemifinalWHITE HOUSE433NT♦5+2+0
+0.0SemifinalWHITE HOUSE444♠♦K=+0
+0.0SemifinalWHITE HOUSE464♥♦A-1-2
+0.0FinalSAIC VW176♣+1-11
+0.0FinalSAIC VW184♠♦8=+0
+0.0FinalSAIC VW196♠♥3=-1
-0.0FinalSAIC VW342♥♦A+1-7
-0.0FinalSAIC VW373NT♥6+1+1
-0.0FinalSAIC VW382NT♥6=-10
-0.0FinalSAIC VW426♥♣2=+0
-0.0FinalSAIC VW436♠♥K+1+11
-0.0FinalSAIC VW481NT♦2=+1
-0.3SemifinalWHITE HOUSE21NT♦Q-1-1
-0.3SemifinalWHITE HOUSE254♥♣6+1-11
-0.3SemifinalWHITE HOUSE304♠♥3+1+0
-0.3SemifinalWHITE HOUSE364♠♥Q+1+13
-0.4QuarterfinalPOLISH STUDENTS354♥♦K=-1
-0.6QuarterfinalPOLISH STUDENTS271NT♦A+1-1
-0.7QuarterfinalPOLISH STUDENTS202♠♠2=+0
-0.7SemifinalWHITE HOUSE213NT♣4+1-13
-1.0QuarterfinalPOLISH STUDENTS232♠+1-6
-1.0SemifinalWHITE HOUSE183NT♦J+2-1
-1.0FinalSAIC VW452♠♦3=-1
-1.4QuarterfinalPOLISH STUDENTS303♠♦Q=+7
-1.7QuarterfinalPOLISH STUDENTS383♦♣A+1+0
-1.7SemifinalWHITE HOUSE402♠♥7-1+2
-1.7SemifinalWHITE HOUSE422♣♥7+1+0
-2.0QuarterfinalPOLISH STUDENTS192♠♦J+1-1
-2.0QuarterfinalPOLISH STUDENTS434♠♥Q-1-4
-2.0SemifinalWHITE HOUSE233NT♣2+3-1
-2.0FinalSAIC VW253♦♣3+1-1
-2.0FinalSAIC VW353NT♥5=-1
-2.3SemifinalWHITE HOUSE151NT♥3-2-5
-2.4QuarterfinalPOLISH STUDENTS444♠♥2+2-1
-2.7FinalSAIC VW303♦♠K=-5
-2.9QuarterfinalPOLISH STUDENTS364♠♥J+2-13
-3.0SemifinalWHITE HOUSE73♠♣A-2-2
-3.1QuarterfinalPOLISH STUDENTS394♠♣T-2+7
-3.1QuarterfinalPOLISH STUDENTS403NTx♣3-2-5
-3.3FinalSAIC VW295♥x♠A=-5
-4.0SemifinalWHITE HOUSE107♥x♠T-3-4
-4.0SemifinalWHITE HOUSE145♣♠J=-7
-4.0SemifinalWHITE HOUSE162♠+2-6
-4.0SemifinalWHITE HOUSE336♣♠A-1-14
-4.7FinalSAIC VW223♦♣Q-1-5
-5.3SemifinalWHITE HOUSE412♥♦7+2-2
-6.3FinalSAIC VW203NT♦4=-10
-6.7SemifinalWHITE HOUSE284♥♦A-3-10
-6.9QuarterfinalPOLISH STUDENTS176♣♠K-1-10
-7.7SemifinalWHITE HOUSE14♣♥7-3-6
-11.0FinalSAIC VW413NT♦2=+1
-17.0SemifinalWHITE HOUSE377NT♦3=+0