CHEN Song · HUAXINHUANBAO

88rank
+67.7Butler · 130 bds
+0.52per board
±5.1swing
+1.01vs par /bd · #30/567
+0.13adjusted /bd
Butler per round: 21 -15.8 -16.8 16.2 -3.5 17.4 26.5 15.3 -7 -6.4 10.5 0.2 10.1by round

vs par split: bidding +0.95 · play +0.06

Strength of schedule: opponents averaged -0.39/bd (an easy draw) → opponent-adjusted +0.13/bd

Card play — on target: opening leads 87.1% #90 of 567 · declarer play 76.9% #269 of 567 · defence 85.5% #181 of 567

Card play by contract type — on target
vs NTvs a suit
Opening leads88.9% (9)86.4% (22)
Declarer play75.0% (12)77.8% (27)
Defence68.8% (16)92.3% (39)

Opening leads by suit led: ♠ 50.0% (6) · ♥ 90.9% (11) · ♦ 100.0% (5) · ♣ 100.0% (9)

vs par by strain: NT -0.28 (39) · a suit +1.56 (91)

vs par by level: part-score +1.89 (47) · game +0.73 (75) · slam -1.62 (8)

By role: declaring -0.13/bd (-0.93 vs par · 75) · defending +1.41/bd (+3.65 vs par · 55)

By vulnerability: vulnerable +1.35/bd (+1.91 vs par · 66) · not vulnerable -0.33/bd (+0.08 vs par · 64)

By round↑ top

RoundPartnerOpponentsRoomBdsButlerAvgvs par
Round 1Z.ZengM.Vanuzzi – P.UggeriOpen10+21.0+2.10+2.30
Round 2Z.ZengW.Cao – J.ZhangClosed10-15.8-1.58+0.10
Round 3Z.ZengR.Cooper – B.ThompsonClosed10-16.8-1.68-2.70
Round 4Z.ZengB.Naidoo – P.SinhaOpen10+16.2+1.62+1.70
Round 7Z.ZengR.Krishnan – R.KhandelwalOpen10-3.5-0.35-1.70
Round 8Z.ZengW.Huang – Q.XieClosed10+17.4+1.74+1.60
Round 9Z.ZengW.Teng – S.YuOpen10+26.5+2.65+5.60
Round 10Z.ZengM.Rahman – M.ChowdhuryOpen10+15.3+1.53+3.20
Round 11Z.ZengP.Sitthicharoensawat – K.LimsinsoponOpen10-7.0-0.70-0.40
Round 12Z.ZengR.Milne – B.O'BrienClosed10-6.4-0.64+0.40
Round 13Z.ZengD.Willis – M.YuenClosed10+10.5+1.05+2.40
Round 14Z.ZengA.Adamson – D.KaneClosed10+0.2+0.02+1.80
Round 15Z.ZengS.Fischer – P.RankinClosed10+10.1+1.01-1.20

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
+14.0Round 7NAMO KK72♦x♠10-4+14
+13.9Round 10BANGLADESH87♦♥8-1+17
+11.9Round 1ITALY Mixed92♥x♦A=+13
+10.9Round 13WE THE NORTH42♥x♥3=+11
+10.2Round 14SCOTLAND BLUE184♥♣6-1+12
+9.8Round 7NAMO KK104♥x♦10-2+9
+9.5Round 10BANGLADESH63NT♥5=+10
+9.1Round 9ONE ESSENTIAL OF RED261NT♥9+4+15
+8.2Round 15AUSTRALIA MIXED286NT♥J=+0
+8.0Round 9ONE ESSENTIAL OF RED294♠♣4=+10
+7.7Round 3AURUSSIA274♥♠2-1+8
+7.5Round 8XINJIANGYILI183♦♣6+2+11
+7.5Round 12IRELAND293NT♥7-2+8
+7.4Round 4INDIA TSANGPO25♥x♣K=+10
+6.8Round 12IRELAND225♣♦J=+11
+6.6Round 11THAILAND Mixed154♥♦7-1+13
+6.3Round 15AUSTRALIA MIXED294♥♠K=+3
+6.2Round 9ONE ESSENTIAL OF RED274♠♥A=+0
+5.9Round 15AUSTRALIA MIXED263NT♠J=-1
+5.7Round 2HIIMOTOR204♠♥6-1+12
+5.7Round 4INDIA TSANGPO43NT♠J+2+0
+5.7Round 8XINJIANGYILI126♣♠6=-2
+5.6Round 4INDIA TSANGPO62♥♠7=+6
+5.4Round 3AURUSSIA255♦x♦8-2+9
+5.2Round 3AURUSSIA294♠♠A=+10
+5.2Round 8XINJIANGYILI193NT♥6-2+11
+5.1Round 13WE THE NORTH55♥♦A=+11
+4.3Round 4INDIA TSANGPO103♣♠K-1+5
+4.2Round 1ITALY Mixed55♣♦6+1+0
+4.2Round 3AURUSSIA283NT♦Q+4+2
+4.2Round 9ONE ESSENTIAL OF RED214♥♠J=+0
+4.1Round 15AUSTRALIA MIXED232♠♥Q-1+5
+4.0Round 11THAILAND Mixed193NT♠Q=+0
+3.8Round 1ITALY Mixed62♠♣9=+11
+3.7Round 10BANGLADESH44♦♠A-1+6
+3.6Round 1ITALY Mixed34♥♦6-1+5
+3.6Round 3AURUSSIA214♥♠K+1+0
+3.6Round 8XINJIANGYILI203NT♥6-2+7
+3.5Round 12IRELAND242NT♥J-1+9
+3.3Round 2HIIMOTOR154♥♦10=+6
+3.2Round 7NAMO KK33NT♥10-1+5
+3.2Round 13WE THE NORTH23♦♣Q-1+12
+3.1Round 14SCOTLAND BLUE141NT♠4+3+2
+2.5Round 14SCOTLAND BLUE204♦♥6-1+6
+2.3Round 10BANGLADESH102♠♦4+1+1
+2.2Round 13WE THE NORTH13♥♦Q+1+6
+1.9Round 7NAMO KK14♥♥9-2+0
+1.8Round 9ONE ESSENTIAL OF RED303NT♦Q-1+10
+1.7Round 9ONE ESSENTIAL OF RED254♥♦6+2+11
+1.5Round 1ITALY Mixed23♦♠9+1+0
+1.5Round 14SCOTLAND BLUE124♠♥10+1+1
+1.4Round 11THAILAND Mixed123NT♠10+1+0
+1.2Round 11THAILAND Mixed172♥♠2-1+8
+1.2Round 12IRELAND233♥♥J+1+1
+1.0Round 8XINJIANGYILI143NT♣8+1+1
+1.0Round 13WE THE NORTH74♠♣2=-1
+0.9Round 9ONE ESSENTIAL OF RED234♥x♦A-3+14
+0.7Round 4INDIA TSANGPO73♠♣K=+0
+0.6Round 1ITALY Mixed13♠♣6+1+6
+0.6Round 2HIIMOTOR131NT♦K=-1
+0.6Round 4INDIA TSANGPO34♥♠K+2+11
+0.5Round 10BANGLADESH34♣♥2=+7
+0.5Round 11THAILAND Mixed201NT♠2-1+0
+0.5Round 15AUSTRALIA MIXED253NT♣4=+1
+0.3Round 1ITALY Mixed73♦♥5=+0
+0.2Round 13WE THE NORTH32♦x♥A-2-8
+0.1Round 13WE THE NORTH93NT♠3+1-1
-0.2Round 15AUSTRALIA MIXED243NT♠5+2+0
-0.3Round 8XINJIANGYILI133♦♠9+1+0
-0.5Round 8XINJIANGYILI153NT♥4+1+0
-0.7Round 9ONE ESSENTIAL OF RED224♦♥2=+0
-0.7Round 14SCOTLAND BLUE193NT♦K-1+0
-0.8Round 1ITALY Mixed101NT♠6=-1
-0.8Round 7NAMO KK45♠x♦A-2+0
-1.0Round 1ITALY Mixed42♠♣9=-1
-1.0Round 2HIIMOTOR124♥♣A-2+9
-1.0Round 8XINJIANGYILI164♣♥9-1-5
-1.0Round 12IRELAND211NT♣3-1+0
-1.1Round 3AURUSSIA264♥♠K+2-13
-1.1Round 10BANGLADESH91♠♦3=-5
-1.2Round 2HIIMOTOR182♥♠A-1-4
-1.2Round 9ONE ESSENTIAL OF RED283♥♦4-1-4
-1.3Round 11THAILAND Mixed163♥♣9=+0
-1.4Round 4INDIA TSANGPO54♥♦K-4-1
-1.4Round 14SCOTLAND BLUE132♠♦7=+0
-1.5Round 13WE THE NORTH103NT♠3-1-6
-1.6Round 4INDIA TSANGPO15♣♠K=-2
-1.7Round 2HIIMOTOR142NT♥4+1-6
-1.7Round 15AUSTRALIA MIXED212♥♠7=+1
-1.9Round 4INDIA TSANGPO93NT♣6-2-7
-1.9Round 8XINJIANGYILI115♥x♣K-3-2
-1.9Round 8XINJIANGYILI175♣♠6-2-5
-2.2Round 14SCOTLAND BLUE164♥♠A-1+1
-2.5Round 7NAMO KK22♠♣A-2+0
-2.6Round 12IRELAND256♥♣10=+11
-2.7Round 14SCOTLAND BLUE113NT♣10+1+0
-2.8Round 12IRELAND304♠x♦2-1-6
-2.8Round 15AUSTRALIA MIXED303NT♦4-1-5
-3.1Round 1ITALY Mixed84♠♥4-1-10
-3.1Round 10BANGLADESH73NT♣9=+0
-3.2Round 4INDIA TSANGPO82♥♦K-2-5
-3.3Round 10BANGLADESH53♦♠K-2+0
-3.3Round 15AUSTRALIA MIXED274♥♠K-1-4
-3.5Round 9ONE ESSENTIAL OF RED242♠♥10-2+0
-3.5Round 10BANGLADESH24♠♥A+1-4
-3.6Round 10BANGLADESH13NT♣Q-2+0
-3.9Round 11THAILAND Mixed182♠♣5-1-4
-4.1Round 7NAMO KK55♣♥3-2-6
-4.5Round 13WE THE NORTH86♦♣6=+0
-4.5Round 14SCOTLAND BLUE172♠♣6+3-6
-4.6Round 2HIIMOTOR163NT♥5+1-7
-4.9Round 12IRELAND261NT♠4-1-6
-5.1Round 11THAILAND Mixed115♦♠7-1-4
-5.2Round 2HIIMOTOR193NT♠3-1-6
-5.2Round 11THAILAND Mixed134♥♠7=-10
-5.2Round 11THAILAND Mixed145♣♠2=-7
-5.4Round 2HIIMOTOR115♥x♣A-3-2
-5.6Round 12IRELAND273NT♣7-1-10
-5.6Round 14SCOTLAND BLUE154♠♥4-1+2
-6.2Round 13WE THE NORTH64♥♥3=+0
-6.3Round 2HIIMOTOR174♠♥4=+0
-6.9Round 15AUSTRALIA MIXED223NT♠4-1-12
-7.3Round 7NAMO KK65♦xx♣K=-9
-8.0Round 3AURUSSIA232♣♦2-4-11
-8.0Round 7NAMO KK93NT♠2-1-16
-8.5Round 12IRELAND286♥♣4-1-14
-9.7Round 3AURUSSIA223NT♥8=-7
-9.7Round 7NAMO KK85♥♦Q-1-14
-10.2Round 3AURUSSIA306♥♠A-1-11
-13.9Round 3AURUSSIA247♦x♥4-3-14