🇺🇸 BERKOWITZ David · USA 2

38rank
+65.8Butler · 256 bds
+0.26per board
±4.7swing
+0.58vs par /bd · #25/122
+0.25adjusted /bd
Butler per round: 9.6 18.2 20.5 11.1 -21.4 20 -10.6 -15.2 -17.1 66.1 14.6 4.2 -3.1 -27.4 14.8 -18.5by round

vs par split: bidding +0.50 · play +0.34

Strength of schedule: opponents averaged -0.01/bd (an average draw) → opponent-adjusted +0.25/bd

Card play — on target: opening leads 89.7% #15 of 121 · declarer play 86.0% #6 of 121 · defence 89.0% #42 of 122

Card play by contract type — on target
vs NTvs a suit
Opening leads·89.7% (39)
Declarer play·86.0% (50)
Defence·89.0% (91)

Opening leads by suit led: ♠ 100.0% (5) · ♥ 71.4% (7) · ♦ 100.0% (8) · ♣ 89.5% (19)

vs par by strain: a suit +0.84 (179)

vs par by level: part-score +1.03 (74) · game +0.54 (85) · slam +1.45 (20)

By role: declaring +0.36/bd (-2.06 vs par · 121) · defending +0.18/bd (+3.03 vs par · 131)

By vulnerability: vulnerable -0.17/bd (+0.25 vs par · 128) · not vulnerable +0.68/bd (+0.91 vs par · 128)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 1M.LairM.Devletian – M.TagliaviaOpen16+9.6+0.60+2.12
Round 3M.LairJ.Russyan – K.LasockiOpen16+18.2+1.14+3.62
Round 4M.LairA.Fisher – F.HamiltonOpen16+20.5+1.28+1.81
Round 6M.LairW.Haughie – A.BraithwaiteOpen16+11.1+0.69+0.12
Round 8M.LairC.De Miguel – A.MadalaOpen16-21.4-1.34-0.81
Round 9M.LairJ.Khalid – S.AkhtarOpen16+20.0+1.25+0.31
Round 10M.LairC.Bosenberg – N.EberOpen16-10.6-0.66+0.25
Round 11M.LairY.Nakamura – M.HirataOpen16-15.2-0.95-0.44
Round 12M.LairM.Khalil – M.KhedrOpen16-17.1-1.07-1.69
Round 13M.LairD.Poddar – SRIDHAR ROpen16+66.1+4.13+5.19
Round 15M.LairD.Price – C.SimpsonOpen16+14.6+0.91-1.81
Round 17M.LairH.Hallen – B.DahlbergOpen16+4.2+0.26+0.12
Round 18M.LairD.Johnson – J.StasOpen16-3.1-0.19-0.38
Round 19M.LairA.Hobart – M.KirrOpen16-27.4-1.71+1.06
Round 20M.LairD.Russell – T.RobbOpen16+14.8+0.93+2.31
Round 21M.LairH.Lasut – E.ManoppoClosed16-18.5-1.16-2.56

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
+13.3Round 13🇮🇳 INDIA146♠xx♥3=+12
+12.0Round 13🇮🇳 INDIA64♦x♠Q-6-1
+11.3Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND46N♥T-2+13
+10.6Round 21🇮🇩 INDONESIA126♣♦9=+0
+9.8Round 13🇮🇳 INDIA164♠x♦2=+4
+9.8Round 18🇧🇪 BELGIUM187♥♣7=+0
+9.1Round 1🇻🇪 VENEZUELA84♥♠Q-2+14
+9.1Round 10🇿🇦 SOUTH AFRICA314♥x♦5-2+12
+8.6Round 9🇵🇰 PAKISTAN35♦♠A-3+8
+8.6Round 11🇯🇵 JAPAN164♥♠A=+8
+8.5Round 19🇨🇦 CANADA94♥♣A=+0
+8.5Round 20🇳🇿 NEW ZEALAND176N♥2-1+14
+8.5Round 21🇮🇩 INDONESIA43♠♣4=+12
+8.0Round 13🇮🇳 INDIA14♠♣K-1+11
+7.9Round 17🇸🇪 SWEDEN143N♠9=+3
+7.8Round 12🇪🇬 EGYPT172♠x♦K-4+9
+7.5Round 12🇪🇬 EGYPT242♠♣4-1+8
+7.4Round 3🇵🇱 POLAND24♠♣K=+8
+7.2Round 4🇺🇸 USA 1293N♠5-2+8
+7.2Round 17🇸🇪 SWEDEN114♥♣3-1+11
+7.0Round 3🇵🇱 POLAND16♥♥2=+11
+7.0Round 9🇵🇰 PAKISTAN43♠♦K+2+10
+7.0Round 13🇮🇳 INDIA74♥♦3+3+12
+6.9Round 13🇮🇳 INDIA82♠♥Q-1+9
+6.9Round 13🇮🇳 INDIA125♥x♦K-1+11
+6.8Round 17🇸🇪 SWEDEN84♣♠6=+6
+6.4Round 9🇵🇰 PAKISTAN122♠♦J=+6
+6.3Round 17🇸🇪 SWEDEN72♠♣4-2+13
+6.2Round 4🇺🇸 USA 1182N♣7-2+13
+6.1Round 18🇧🇪 BELGIUM244♥♠3+1+8
+6.0Round 18🇧🇪 BELGIUM263N♥K-3+9
+5.8Round 3🇵🇱 POLAND64♠♥A-4+5
+5.8Round 12🇪🇬 EGYPT304♠♠Q=+0
+5.6Round 4🇺🇸 USA 1223♣♣5-2+5
+5.5Round 9🇵🇰 PAKISTAN133N♦5+1+1
+5.5Round 21🇮🇩 INDONESIA163N♣3-1+10
+5.4Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND94♥♣Q=+0
+5.3Round 4🇺🇸 USA 1233♠♣7=+11
+4.9Round 20🇳🇿 NEW ZEALAND294♠♦4=-1
+4.8Round 10🇿🇦 SOUTH AFRICA194♥♥5+1+1
+4.8Round 10🇿🇦 SOUTH AFRICA303N♥2+1+1
+4.8Round 20🇳🇿 NEW ZEALAND213N♥6-4+12
+4.5Round 11🇯🇵 JAPAN42♠♣7+2+10
+4.5Round 11🇯🇵 JAPAN96♠♥J=+0
+4.5Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND73♥♣3+1-9
+4.4Round 4🇺🇸 USA 1324N♦T=-1
+4.4Round 8🇦🇷 ARGENTINA174♥♣A=-1
+4.3Round 1🇻🇪 VENEZUELA163♦♠Q-3-3
+4.2Round 1🇻🇪 VENEZUELA12♠♣3+1+6
+4.2Round 6🇦🇺 AUSTRALIA203♠♣K=+0
+4.1Round 11🇯🇵 JAPAN102♠♦T-2+2
+4.0Round 10🇿🇦 SOUTH AFRICA183N♦3=+7
+3.9Round 3🇵🇱 POLAND75♣♥2=+17
+3.8Round 4🇺🇸 USA 1314♠♦6-1+12
+3.8Round 6🇦🇺 AUSTRALIA323N♦J-2+6
+3.8Round 19🇨🇦 CANADA123♥♦5-1+12
+3.7Round 20🇳🇿 NEW ZEALAND226♠♣J+1+13
+3.4Round 8🇦🇷 ARGENTINA203N♠6+3+2
+3.4Round 11🇯🇵 JAPAN51♥♦4+2+6
+3.4Round 13🇮🇳 INDIA133♥♣K=+1
+3.3Round 1🇻🇪 VENEZUELA114♠♥9=+1
+3.3Round 3🇵🇱 POLAND123N♠Q=-1
+3.3Round 18🇧🇪 BELGIUM173N♥A-1+5
+3.1Round 12🇪🇬 EGYPT192♥♠A-1+3
+3.0Round 1🇻🇪 VENEZUELA123N♦3+1+0
+3.0Round 4🇺🇸 USA 1253N♦3-3+7
+2.9Round 3🇵🇱 POLAND94♥♣7=+0
+2.9Round 6🇦🇺 AUSTRALIA252♠♥A=+6
+2.9Round 8🇦🇷 ARGENTINA311N♥Q=+5
+2.8Round 13🇮🇳 INDIA54♠♣A-1+6
+2.7Round 13🇮🇳 INDIA151♠♦K-1+2
+2.6Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND64♠♣3-3+2
+2.5Round 10🇿🇦 SOUTH AFRICA324♥♦7-1+12
+2.5Round 13🇮🇳 INDIA23N♦2-1+12
+2.5Round 20🇳🇿 NEW ZEALAND26Pass+3
+2.4Round 1🇻🇪 VENEZUELA145♦♠A-1+5
+2.4Round 17🇸🇪 SWEDEN24♥♦7-2+7
+2.2Round 6🇦🇺 AUSTRALIA303N♠J+1+1
+2.2Round 20🇳🇿 NEW ZEALAND195♣♠T=+0
+2.1Round 6🇦🇺 AUSTRALIA274♠♣K-1+4
+2.1Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND152♠♣4=+0
+2.1Round 17🇸🇪 SWEDEN93♥♣Q-1-2
+2.1Round 21🇮🇩 INDONESIA141N♠T=-1
+2.0Round 1🇻🇪 VENEZUELA64♥♣A+1+0
+2.0Round 6🇦🇺 AUSTRALIA246♣♠T+1-10
+2.0Round 9🇵🇰 PAKISTAN143♥♠K=+0
+2.0Round 10🇿🇦 SOUTH AFRICA243N♦Q-1+4
+2.0Round 11🇯🇵 JAPAN143♥♣3=+1
+2.0Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND83♥♣T-1-2
+2.0Round 18🇧🇪 BELGIUM323N♠J=+11
+2.0Round 20🇳🇿 NEW ZEALAND281N♥2=+5
+1.8Round 6🇦🇺 AUSTRALIA212♠♣6=+5
+1.8Round 8🇦🇷 ARGENTINA222♦♣K-1+4
+1.7Round 3🇵🇱 POLAND52♥♣J-1+5
+1.7Round 10🇿🇦 SOUTH AFRICA283♥♦K-1+0
+1.6Round 12🇪🇬 EGYPT214♠♣4+1+0
+1.6Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND104♥♦6+1+0
+1.6Round 20🇳🇿 NEW ZEALAND183♥♣K+1+7
+1.5Round 20🇳🇿 NEW ZEALAND251N♦7+3+7
+1.4Round 1🇻🇪 VENEZUELA94♥♦3+1+0
+1.4Round 18🇧🇪 BELGIUM313N♦Q+1+1
+1.2Round 20🇳🇿 NEW ZEALAND243♥♣K+1+4
+1.1Round 3🇵🇱 POLAND103♣♠K-1+0
+1.1Round 9🇵🇰 PAKISTAN23♦♣6+1+0
+1.1Round 9🇵🇰 PAKISTAN101N♦3+3-9
+1.1Round 21🇮🇩 INDONESIA154♠♣A+1-11
+1.0Round 8🇦🇷 ARGENTINA21Pass+3
+1.0Round 8🇦🇷 ARGENTINA244♠♣J=+1
+1.0Round 9🇵🇰 PAKISTAN114♥♦A+1+0
+1.0Round 11🇯🇵 JAPAN83N♠8=-2
+0.9Round 3🇵🇱 POLAND141N♥4+3+6
+0.8Round 3🇵🇱 POLAND132♦♦5=+1
+0.8Round 6🇦🇺 AUSTRALIA315♠x♥K-3-5
+0.8Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND134♥♠5+2-13
+0.8Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND144♠♦6+1+0
+0.7Round 1🇻🇪 VENEZUELA43N♥T+1-13
+0.7Round 10🇿🇦 SOUTH AFRICA253♣♠4=+0
+0.7Round 19🇨🇦 CANADA34♣♣3-2-5
+0.7Round 19🇨🇦 CANADA133♦♣J=+0
+0.5Round 17🇸🇪 SWEDEN102N♥5=+0
+0.4Round 3🇵🇱 POLAND115♦x♣2-2+0
+0.4Round 4🇺🇸 USA 1274♠♦3=+0
+0.3Round 4🇺🇸 USA 1214♥♠6+2-11
+0.3Round 6🇦🇺 AUSTRALIA262♠♥T+1+0
+0.3Round 17🇸🇪 SWEDEN32♥♥3+1+1
+0.3Round 17🇸🇪 SWEDEN123♦♠2+1-7
+0.3Round 21🇮🇩 INDONESIA104♥♣7=+0
+0.2Round 1🇻🇪 VENEZUELA134♥♠A=-1
+0.2Round 18🇧🇪 BELGIUM204♠♦6=-1
+0.1Round 12🇪🇬 EGYPT223N♠J=-1
+0.0Round 1🇻🇪 VENEZUELA24♥♦2+1+0
+0.0Round 3🇵🇱 POLAND81N♣2-1-3
-0.0Round 8🇦🇷 ARGENTINA324♠♦Q+2+11
-0.0Round 9🇵🇰 PAKISTAN51N♣4=+2
-0.0Round 13🇮🇳 INDIA113N♠6=+11
-0.0Round 17🇸🇪 SWEDEN11N♣T-1-2
-0.0Round 19🇨🇦 CANADA164♠♣A-2+0
-0.0Round 20🇳🇿 NEW ZEALAND314♥♦4=+0
-0.1Round 8🇦🇷 ARGENTINA272♥♦Q-2+0
-0.2Round 6🇦🇺 AUSTRALIA222♣♦9+1+7
-0.2Round 8🇦🇷 ARGENTINA231N♠8-1+1
-0.2Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND11N♠4+2+0
-0.2Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND114♥♠6=-1
-0.3Round 4🇺🇸 USA 1303♦♣5+1+7
-0.3Round 19🇨🇦 CANADA14♥♠6=+0
-0.4Round 21🇮🇩 INDONESIA136N♥6=+0
-0.6Round 17🇸🇪 SWEDEN131♦♥T+2-1
-0.6Round 18🇧🇪 BELGIUM305♣♠J+1-11
-0.7Round 12🇪🇬 EGYPT324♠♣A=-1
-0.7Round 19🇨🇦 CANADA53♥♠Q-1+2
-0.8Round 12🇪🇬 EGYPT23Pass-3
-0.8Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND53♣♦Q+3-6
-0.9Round 9🇵🇰 PAKISTAN92♠♥2-2-1
-0.9Round 11🇯🇵 JAPAN11N♣3+1+0
-0.9Round 18🇧🇪 BELGIUM233N♥J+2+0
-1.0Round 6🇦🇺 AUSTRALIA232♥♠2-1-5
-1.0Round 9🇵🇰 PAKISTAN84♠♣K+1+0
-1.0Round 13🇮🇳 INDIA101N♥4+1-1
-1.0Round 20🇳🇿 NEW ZEALAND304♥♠Q+1+0
-1.1Round 6🇦🇺 AUSTRALIA184♦♥K=+9
-1.1Round 6🇦🇺 AUSTRALIA194♠♦7-2-7
-1.1Round 17🇸🇪 SWEDEN43N♦2=+2
-1.2Round 4🇺🇸 USA 1201N♥3=-5
-1.2Round 12🇪🇬 EGYPT203N♥2=-2
-1.3Round 1🇻🇪 VENEZUELA73N♥6=+13
-1.3Round 12🇪🇬 EGYPT282♦♣K=+1
-1.4Round 9🇵🇰 PAKISTAN64♥♣A+2+11
-1.4Round 9🇵🇰 PAKISTAN153♦♠5=+1
-1.4Round 10🇿🇦 SOUTH AFRICA296♠♦K=+0
-1.4Round 13🇮🇳 INDIA44♥♣A=+1
-1.5Round 6🇦🇺 AUSTRALIA173N♠3+1+0
-1.5Round 11🇯🇵 JAPAN24♠♠4-1+2
-1.7Round 9🇵🇰 PAKISTAN164♠♦4=-13
-1.7Round 17🇸🇪 SWEDEN53♥♥A=-6
-1.8Round 4🇺🇸 USA 1263♠♣7-1-6
-1.9Round 1🇻🇪 VENEZUELA153N♠6+2+10
-1.9Round 3🇵🇱 POLAND32♠♣J-1-4
-1.9Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND24♠♥6-1-5
-1.9Round 19🇨🇦 CANADA113N♥7+1+1
-2.0Round 3🇵🇱 POLAND153♦♠8-1+0
-2.0Round 3🇵🇱 POLAND164♠♦K=+0
-2.0Round 6🇦🇺 AUSTRALIA283N♣5+1+0
-2.0Round 10🇿🇦 SOUTH AFRICA224♠♥7=-10
-2.0Round 19🇨🇦 CANADA144♥♣4-1+2
-2.1Round 4🇺🇸 USA 1282♠♦J-2-6
-2.1Round 6🇦🇺 AUSTRALIA292♥♣2+4-9
-2.1Round 19🇨🇦 CANADA64♥♠5+1+0
-2.2Round 21🇮🇩 INDONESIA72♠♦J=+0
-2.5Round 21🇮🇩 INDONESIA22♠♣K-1+2
-2.6Round 18🇧🇪 BELGIUM272♥♣6=-5
-2.6Round 20🇳🇿 NEW ZEALAND205♣♥A-1-6
-2.7Round 12🇪🇬 EGYPT293N♦3-1-6
-2.8Round 4🇺🇸 USA 1242♥♦6+1-1
-2.8Round 18🇧🇪 BELGIUM194♥♦7-3-9
-2.9Round 11🇯🇵 JAPAN33N♠J+1+0
-2.9Round 18🇧🇪 BELGIUM283N♣5-2-11
-3.0Round 9🇵🇰 PAKISTAN72N♠5=-11
-3.0Round 12🇪🇬 EGYPT312N-1-5
-3.0Round 13🇮🇳 INDIA34♥♠Q-2+5
-3.0Round 21🇮🇩 INDONESIA52N♣4=-6
-3.1Round 1🇻🇪 VENEZUELA103N♦4=+1
-3.1Round 8🇦🇷 ARGENTINA184♠♥A-1-5
-3.2Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND124♠♦K=-3
-3.3Round 4🇺🇸 USA 1194♥♠T=+0
-3.3Round 9🇵🇰 PAKISTAN14♣♦5=+0
-3.3Round 10🇿🇦 SOUTH AFRICA273♠♥A+2-3
-3.3Round 20🇳🇿 NEW ZEALAND275♦♥K-1-5
-3.4Round 19🇨🇦 CANADA156♥♥2=+13
-3.5Round 8🇦🇷 ARGENTINA303♠♥K=-7
-3.5Round 19🇨🇦 CANADA47♠♠5=+0
-3.6Round 18🇧🇪 BELGIUM222♦x♥9=-2
-3.6Round 21🇮🇩 INDONESIA82♠♠3=+0
-3.8Round 8🇦🇷 ARGENTINA263N♥8=-10
-3.8Round 13🇮🇳 INDIA97♥♣2=-12
-3.9Round 10🇿🇦 SOUTH AFRICA213N♥T+1+1
-4.1Round 11🇯🇵 JAPAN134♥♠K+2+12
-4.2Round 4🇺🇸 USA 1173♥♦Q-1-4
-4.4Round 18🇧🇪 BELGIUM213N♣5=+11
-4.5Round 19🇨🇦 CANADA26♦♦A=+0
-4.7Round 11🇯🇵 JAPAN73♣♠A-1-12
-4.7Round 17🇸🇪 SWEDEN15Pass-3
-4.7Round 20🇳🇿 NEW ZEALAND234♠x♣K=-5
-4.7Round 21🇮🇩 INDONESIA13N♦6-1-10
-4.8Round 12🇪🇬 EGYPT253N♣6=-3
-4.9Round 8🇦🇷 ARGENTINA284♥♦6+1-4
-5.0Round 11🇯🇵 JAPAN154♠♦Q-1-10
-5.0Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND165♥♠K=+0
-5.2Round 8🇦🇷 ARGENTINA194♠♣2-4-7
-5.2Round 15🏴󠁧󠁢󠁥󠁮󠁧󠁿 ENGLAND35♦♥5=-5
-5.6Round 10🇿🇦 SOUTH AFRICA264♠♣8=+1
-5.6Round 21🇮🇩 INDONESIA32N♠6-2-8
-5.9Round 1🇻🇪 VENEZUELA36♣♠9=+13
-6.0Round 19🇨🇦 CANADA83♠♦3=-11
-6.1Round 21🇮🇩 INDONESIA94♠♥A-1-6
-6.5Round 20🇳🇿 NEW ZEALAND326♦♣A-2-11
-6.6Round 11🇯🇵 JAPAN126♣♦K=+0
-6.7Round 8🇦🇷 ARGENTINA253♣♠6=-1
-7.0Round 18🇧🇪 BELGIUM253♠♥9+1+1
-7.1Round 18🇧🇪 BELGIUM293N♥5-1-13
-7.2Round 12🇪🇬 EGYPT183N♦Q-1-13
-7.3Round 10🇿🇦 SOUTH AFRICA174N♠J+2-11
-7.4Round 10🇿🇦 SOUTH AFRICA233N♣6-4-11
-8.0Round 17🇸🇪 SWEDEN64♠x♥8-1-5
-8.0Round 19🇨🇦 CANADA106♠♣T+1+13
-8.4Round 8🇦🇷 ARGENTINA295♣x♠9-3-5
-8.4Round 11🇯🇵 JAPAN116♥♠4-1-11
-8.7Round 19🇨🇦 CANADA73N♦4+1-10
-8.7Round 21🇮🇩 INDONESIA115♣♥K-2-11
-8.8Round 1🇻🇪 VENEZUELA53Nx♠2=-12
-8.9Round 12🇪🇬 EGYPT264♠♣K+1-1
-9.2Round 11🇯🇵 JAPAN66N♠9-1-13
-9.3Round 10🇿🇦 SOUTH AFRICA206♦♠8=+0
-9.8Round 21🇮🇩 INDONESIA63N♠J-1-12
-11.1Round 3🇵🇱 POLAND46♦♠T=+13
-12.4Round 12🇪🇬 EGYPT275Nx♠J-3-13
-13.5Round 17🇸🇪 SWEDEN166♠♥Q-1-15