STERN David · STERN

500rank
-25.9Butler · 110 bds
-0.24per board
±4.2swing
-0.89vs par /bd · #609/672
-0.42adjusted /bd
Butler per round: -7.5 0.5 15.3 -13.4 4.9 -21.4 -16.2 -2.6 3.1 1.7 9.7by round

vs par split: bidding -0.84 · play -0.14

Strength of schedule: opponents averaged -0.18/bd (an easy draw) → opponent-adjusted -0.42/bd

Card play — on target: opening leads 81.2% #360 of 671 · declarer play 78.9% #304 of 671 · defence 86.0% #305 of 672

Card play by contract type — on target
vs NTvs a suit
Opening leads·81.2% (16)
Declarer play·78.9% (19)
Defence·86.0% (43)

Opening leads by suit led: ♠ 100.0% (3) · ♥ 75.0% (4) · ♦ 66.7% (3) · ♣ 83.3% (6)

vs par by strain: a suit -0.99 (76)

vs par by level: part-score -0.84 (37) · game -0.03 (31) · slam -5.38 (8)

By role: declaring +0.00/bd (-2.31 vs par · 51) · defending -0.44/bd (+0.34 vs par · 59)

By vulnerability: vulnerable -0.30/bd (-0.85 vs par · 62) · not vulnerable -0.15/bd (-0.94 vs par · 48)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 3R.KrochmalikN.Chen – Y.JingOpen10-7.5-0.75+0.60
Round 4R.KrochmalikP.Lambardi – F.MacriOpen10+0.5+0.05+0.20
Round 5R.KrochmalikC.Liu – W.NieOpen10+15.3+1.53+0.80
Round 6R.KrochmalikM.Barel – Y.ZackClosed10-13.4-1.34-2.50
Round 7R.KrochmalikB.Majali – G.GhanemClosed10+4.9+0.49-0.80
Round 8R.KrochmalikT.Gotard – J.LesniczakOpen10-21.4-2.14-3.10
Round 9R.KrochmalikZ.Chen – J.LinOpen10-16.2-1.62-2.40
Round 10R.KrochmalikZ.Li – Y.GuClosed10-2.6-0.26+1.10
Round 11R.KrochmalikJ.Goenka – S.IyengarClosed10+3.1+0.31-0.50
Round 12R.KrochmalikW.Han – J.ZhangOpen10+1.7+0.17-0.60
Round 13R.KrochmalikK.Sung – S.KwonOpen10+9.7+0.97-2.60

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
+11.1Round 13HAPPY BRIDGE56♦♥J=+0
+9.7Round 3BEIJING ZHU YE225♣♥6-1+12
+8.1Round 5CHINA LIUPANSHUI133Nx♠2-1+12
+7.2Round 10TONGJI UNIVERSITY26♦x♥A-1+11
+6.5Round 12BLUEMAROON243N♥4=+11
+6.5Round 13HAPPY BRIDGE63N♥6+2-11
+6.4Round 5CHINA LIUPANSHUI156♦♠J=-2
+5.8Round 11INDIA RED173♦♠A-5+4
+5.5Round 10TONGJI UNIVERSITY32♦♠8-1+6
+5.2Round 10TONGJI UNIVERSITY95♦♠K-1+6
+5.0Round 7PETRA85♠x♣A-2+0
+4.7Round 4SOCMA84♠♦Q-2+6
+4.2Round 3BEIJING ZHU YE264♠♦Q=+8
+4.1Round 4SOCMA13♠♦8+1+2
+4.1Round 13HAPPY BRIDGE24♥♣5+1+0
+3.6Round 11INDIA RED141♥♠6-3+15
+3.5Round 12BLUEMAROON292♠♠2=+5
+3.1Round 12BLUEMAROON305♣♦A-2+6
+3.0Round 9XIAMEN304♠♥Q-1+5
+2.9Round 11INDIA RED154♠♥4-1-2
+2.8Round 12BLUEMAROON261N♦5+1+6
+2.7Round 9XIAMEN262N♠J+1+0
+2.4Round 4SOCMA71N♣2+3+1
+2.4Round 6HERBST252♥♦6=-1
+2.4Round 10TONGJI UNIVERSITY71N♦5+3-8
+2.3Round 9XIAMEN232♦♦2-2+2
+2.2Round 3BEIJING ZHU YE243♣♦A-1+3
+2.2Round 5CHINA LIUPANSHUI121♥♣2-2+2
+2.1Round 11INDIA RED123♥x♠9-2-8
+1.8Round 7PETRA44♥♦7+2+1
+1.5Round 4SOCMA33N♥9+1-1
+1.5Round 8GERMANY OPEN173N♠7+1-5
+1.3Round 3BEIJING ZHU YE295♦♣A+1-1
+1.3Round 10TONGJI UNIVERSITY83N♠3-2+5
+1.2Round 5CHINA LIUPANSHUI113♥♣9-2+5
+1.2Round 5CHINA LIUPANSHUI172♠♦2-1-2
+1.2Round 11INDIA RED132♥♣4=+1
+1.0Round 6HERBST223♠♦Q=+6
+1.0Round 7PETRA24♠♥J-1-1
+1.0Round 8GERMANY OPEN142♠♥K-2+0
+1.0Round 8GERMANY OPEN181N♠J=-1
+1.0Round 10TONGJI UNIVERSITY42♠♣3-1+5
+0.9Round 6HERBST292♦♣3+1+0
+0.9Round 7PETRA64♥♥6+1+0
+0.9Round 9XIAMEN244♥♥10=-5
+0.8Round 4SOCMA10Pass+3
+0.8Round 12BLUEMAROON223♦♥10+1+0
+0.8Round 13HAPPY BRIDGE33N♥7+2+0
+0.7Round 5CHINA LIUPANSHUI161N♥9-3+0
+0.7Round 7PETRA103♥♣Q=+0
+0.4Round 6HERBST303N♠3-1+5
+0.3Round 3BEIJING ZHU YE211N♣10+1+1
+0.3Round 5CHINA LIUPANSHUI193♠♣5-1-2
+0.2Round 12BLUEMAROON253N♣3+1-5
+0.1Round 7PETRA94♥♦2+1+11
+0.1Round 13HAPPY BRIDGE102N♥K=+0
+0.0Round 3BEIJING ZHU YE251N♥10=+0
-0.0Round 7PETRA33♦♠K-2-9
-0.0Round 13HAPPY BRIDGE94♠♠8+1+0
-0.1Round 4SOCMA24N♦2=+0
-0.1Round 8GERMANY OPEN203♦x♥2-2+3
-0.2Round 6HERBST274♥♦K-1-5
-0.2Round 11INDIA RED194♠♥K=+0
-0.2Round 12BLUEMAROON213♥♦6=-1
-0.4Round 13HAPPY BRIDGE74♥♠7=+1
-0.5Round 12BLUEMAROON235♦♠2-1-6
-0.6Round 5CHINA LIUPANSHUI204♠♣A=+1
-0.6Round 9XIAMEN283N♥K+1+5
-0.8Round 7PETRA55♦♠3-1-3
-0.9Round 11INDIA RED203N♠4+2-13
-1.0Round 4SOCMA51N♦2-1+1
-1.0Round 6HERBST283N♥4+1-1
-1.1Round 8GERMANY OPEN162♠♣5+1+0
-1.2Round 13HAPPY BRIDGE14♠♣4=+0
-1.9Round 5CHINA LIUPANSHUI142♠♣7+1-1
-1.9Round 7PETRA14♠♥A+2-1
-1.9Round 7PETRA74♠♥6-1-6
-2.1Round 11INDIA RED183♣♦3=+0
-2.2Round 4SOCMA64♣♠Q-2-11
-2.3Round 5CHINA LIUPANSHUI184♠♣3-1-5
-2.3Round 9XIAMEN253N♠6-1-6
-2.4Round 8GERMANY OPEN114♥x♣2-1-5
-2.5Round 4SOCMA92♣♥A+1+0
-2.5Round 9XIAMEN222♠♠10+2-6
-2.6Round 9XIAMEN272♠♦9+1+0
-2.8Round 8GERMANY OPEN152♥♣3+2-1
-2.9Round 6HERBST264♠♥Q+2-6
-2.9Round 10TONGJI UNIVERSITY11N♣4=+0
-3.2Round 8GERMANY OPEN194♦♦2=-6
-3.3Round 3BEIJING ZHU YE303N♥7=+6
-3.3Round 6HERBST243N♠Q-2-6
-3.4Round 8GERMANY OPEN123N♣9-2-6
-3.6Round 13HAPPY BRIDGE44♠♥3=+1
-4.0Round 12BLUEMAROON282♠♦K=-8
-4.2Round 11INDIA RED113N♥4+2-1
-5.1Round 11INDIA RED163N♥5+3-1
-5.3Round 6HERBST216♥♣A-1-11
-5.4Round 6HERBST233♥♥3-1-6
-5.5Round 10TONGJI UNIVERSITY62♠♠2+2-6
-6.3Round 3BEIJING ZHU YE284♥♦6=-5
-6.6Round 10TONGJI UNIVERSITY104♠♣5-2-8
-6.8Round 9XIAMEN213Nx♣8=-8
-6.9Round 3BEIJING ZHU YE273N♥7+1-7
-7.2Round 4SOCMA43N♣K=+1
-7.7Round 13HAPPY BRIDGE86♠♠3-2-17
-8.7Round 3BEIJING ZHU YE233♣♥K+2-11
-10.2Round 10TONGJI UNIVERSITY56♠♥4=+0
-10.3Round 9XIAMEN292♣♣9-4-11
-10.5Round 12BLUEMAROON277♥x♠A-2-14
-11.9Round 8GERMANY OPEN136♠♥A=-10