🇺🇸 BERKOWITZ Dana · USA

6rank
+6.0Butler · 32 bds
+0.19per board
±6.0swing
+0.23adjusted /bd
Butler per round: 6 6by round

Strength of schedule: opponents averaged +0.04/bd (an average draw) → opponent-adjusted +0.23/bd

By role: declaring -0.39/bd (18) · defending +0.77/bd (13)

By vulnerability: not vulnerable +0.19/bd (32)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Play-offA.MarriottY.Liu – X.ChangOpen16+6.0+0.38·
Play-offA.MarriottL.Peng – Y.LiuClosed16+0.0+0.00·

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
+12.0Play-off🇨🇳 China453N♦3=·
+10.0Play-off🇨🇳 China121N♥4+2·
+10.0Play-off🇨🇳 China474♦♥A-1·
+8.0Play-off🇨🇳 China85♣x♠K-2·
+6.0Play-off🇨🇳 China132♣♦6+2·
+6.0Play-off🇨🇳 China152♥♣A+2·
+5.0Play-off🇨🇳 China443♥♦J-2·
+3.0Play-off🇨🇳 China3Pass·
+2.0Play-off🇨🇳 China333♥♠J+2·
+2.0Play-off🇨🇳 China433N♦6+2·
+1.0Play-off🇨🇳 China53N♦4+3·
+1.0Play-off🇨🇳 China413N♠7+2·
+1.0Play-off🇨🇳 China461N♠5+1·
-0.0Play-off🇨🇳 China23N♠9-2·
-0.0Play-off🇨🇳 China43♦♣4-2·
-0.0Play-off🇨🇳 China95♣x♥K=·
-0.0Play-off🇨🇳 China141N♠3+3·
-0.0Play-off🇨🇳 China163N♥5=·
+0.0Play-off🇨🇳 China361N♥6+2·
+0.0Play-off🇨🇳 China484♥♠Q-2·
-1.0Play-off🇨🇳 China13N♠K+2·
-1.0Play-off🇨🇳 China73♣♥T+1·
-1.0Play-off🇨🇳 China343N♠A+2·
-1.0Play-off🇨🇳 China384♠♥A+1·
-1.0Play-off🇨🇳 China393N♥6+1·
-1.0Play-off🇨🇳 China402N♦5+1·
-4.0Play-off🇨🇳 China63♠♣7-3·
-4.0Play-off🇨🇳 China352♠♣T-1·
-9.0Play-off🇨🇳 China422N♣Q-2·
-10.0Play-off🇨🇳 China113N♦7-1·
-12.0Play-off🇨🇳 China106♠♥5-1·
-16.0Play-off🇨🇳 China374♠♠6+1·