🇺🇸 CHEN Andrew · USA1
3rank
+123.4Butler · 96 bds
+1.29per board
±5.5swing
+1.28vs par /bd · #5/20
+0.72adjusted /bd
by round
vs par split: bidding +0.88 · play +0.44
Strength of schedule: opponents averaged -0.57/bd (an easy draw) → opponent-adjusted +0.72/bd
Card play — on target: opening leads 72.7% #14 of 16 · declarer play 71.4% #11 of 16 · defence 90.0% #3 of 16
Bidding activity — not a pass: 43.9% #8 of 20 (115/262)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 83.3% (6) | 60.0% (5) |
| Declarer play | 50.0% (4) | 80.0% (10) |
| Defence | 90.9% (11) | 88.9% (9) |
Opening leads by suit led: ♠ 75.0% (4) · ♥ 100.0% (1) · ♦ 50.0% (4) · ♣ 100.0% (2)
vs par by strain: NT +0.97 (31) · a suit +1.23 (64)
vs par by level: part-score +2.52 (25) · game +0.41 (58) · slam +1.83 (12)
By role: declaring +1.23/bd (-0.40 vs par · 47) · defending +1.33/bd (+2.90 vs par · 49)
By vulnerability: vulnerable +1.43/bd (+0.80 vs par · 49) · not vulnerable +1.13/bd (+1.79 vs par · 47)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Quarterfinal | J.Xiao | Y.Ji – X.Wu | Open | 12 | +41.3 | +3.44 | +3.25 |
| Quarterfinal | J.Xiao | Y.Ji – X.Wu | Open | 12 | +27.5 | +2.29 | +2.08 |
| Semifinal | J.Xiao | A.Zodypache – A.Zodypache | Closed | 12 | +25.1 | +2.09 | +2.58 |
| Semifinal | J.Xiao | A.Zodypache – A.Zodypache | Closed | 12 | +50.9 | +4.24 | +5.25 |
| Semifinal | J.Xiao | V.Gahrotra – P.Bansal | Open | 12 | -6.1 | -0.51 | -2.67 |
| Final | J.Xiao | J.Michalski – F.Stezala | Open | 12 | -3.0 | -0.25 | +2.33 |
| Final | J.Xiao | B.Mroz – M.Prokopowicz | Closed | 12 | +17.4 | +1.45 | +0.00 |
| Final | J.Xiao | B.Mroz – M.Prokopowicz | Closed | 12 | -29.7 | -2.48 | -2.58 |
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.
| Butler | Round | Opponents | Bd | Contract | Lead | Res | vs par |
|---|---|---|---|---|---|---|---|
| +13.3 | Quarterfinal | 🇨🇳 CHINA | 4 | 6♣ | = | +7 | |
| +12.0 | Final | 🇵🇱 POLAND | 34 | 3NT | ♣J | -5 | +0 |
| +11.7 | Final | 🇵🇱 POLAND | 13 | 4♥ | ♠4 | = | +10 |
| +11.3 | Semifinal | 🇮🇳 INDIA | 24 | 3♠ | ♣6 | -2 | +13 |
| +10.3 | Quarterfinal | 🇨🇳 CHINA | 10 | 7♥ | = | +0 | |
| +9.0 | Semifinal | 🇮🇳 INDIA | 22 | 3NT | ♦Q | = | +11 |
| +9.0 | Final | 🇵🇱 POLAND | 20 | 4♥x | ♣2 | -3 | -3 |
| +8.7 | Semifinal | 🇮🇳 INDIA | 4 | 6NT | ♦T | -1 | +13 |
| +8.3 | Semifinal | 🇮🇳 INDIA | 18 | 6♥ | ♦4 | = | +1 |
| +7.4 | Quarterfinal | 🇨🇳 CHINA | 34 | 2♣x | +1 | +7 | |
| +7.3 | Semifinal | 🇮🇳 INDIA | 2 | 3♥ | ♠2 | -2 | +7 |
| +7.3 | Semifinal | 🇮🇳 INDIA | 7 | 4♠ | ♥5 | = | +10 |
| +7.0 | Semifinal | 🇮🇳 INDIA | 20 | 3NT | ♠9 | +2 | +10 |
| +7.0 | Final | 🇵🇱 POLAND | 1 | 4♥x | -2 | +5 | |
| +6.7 | Final | 🇵🇱 POLAND | 16 | 3NT | ♠7 | = | -1 |
| +6.3 | Semifinal | 🇮🇳 INDIA | 29 | 3♠ | +1 | +7 | |
| +5.9 | Quarterfinal | 🇨🇳 CHINA | 26 | 5♠ | -1 | +5 | |
| +5.7 | Semifinal | 🇮🇳 INDIA | 36 | 4♥ | -1 | -2 | |
| +5.7 | Final | 🇵🇱 POLAND | 12 | 4♥ | = | +0 | |
| +5.4 | Quarterfinal | 🇨🇳 CHINA | 6 | 4♥ | -1 | +5 | |
| +5.3 | Quarterfinal | 🇨🇳 CHINA | 36 | 3NT | -3 | +5 | |
| +5.3 | Semifinal | 🇮🇳 INDIA | 33 | 1NT | -1 | +5 | |
| +4.9 | Quarterfinal | 🇨🇳 CHINA | 9 | 2♠ | = | +6 | |
| +4.4 | Quarterfinal | 🇨🇳 CHINA | 31 | 5♦x | -5 | -1 | |
| +4.3 | Semifinal | 🇮🇳 INDIA | 5 | 3NT | ♣8 | -1 | +6 |
| +4.3 | Semifinal | 🇮🇳 INDIA | 35 | 4♠ | +1 | +1 | |
| +3.7 | Semifinal | 🇮🇳 INDIA | 10 | 3♥ | ♠A | = | +10 |
| +3.7 | Semifinal | 🇮🇳 INDIA | 16 | 4♥ | ♣2 | +1 | +11 |
| +3.7 | Semifinal | 🇮🇳 INDIA | 27 | 4♠ | +1 | -11 | |
| +3.7 | Final | 🇵🇱 POLAND | 8 | 4♠ | -2 | +6 | |
| +3.4 | Quarterfinal | 🇨🇳 CHINA | 3 | 3♦ | -1 | -2 | |
| +3.3 | Quarterfinal | 🇨🇳 CHINA | 7 | 3♥ | +1 | +1 | |
| +3.3 | Semifinal | 🇮🇳 INDIA | 13 | 1NT | ♠8 | +1 | +5 |
| +3.3 | Final | 🇵🇱 POLAND | 11 | 3NT | +2 | +1 | |
| +3.3 | Final | 🇵🇱 POLAND | 17 | 3NT | ♥7 | -1 | +6 |
| +3.3 | Final | 🇵🇱 POLAND | 22 | 6♦ | ♣Q | +1 | -11 |
| +3.3 | Final | 🇵🇱 POLAND | 26 | 3NT | ♥4 | = | -2 |
| +3.0 | Semifinal | 🇮🇳 INDIA | 15 | 3NT | ♦5 | = | +0 |
| +2.7 | Semifinal | 🇮🇳 INDIA | 23 | 3NT | ♣T | = | +0 |
| +2.6 | Quarterfinal | 🇨🇳 CHINA | 11 | 3NT | = | -1 | |
| +2.6 | Quarterfinal | 🇨🇳 CHINA | 29 | 7♥ | -2 | +13 | |
| +2.3 | Semifinal | 🇮🇳 INDIA | 14 | 2♥ | ♠4 | -2 | +5 |
| +2.3 | Final | 🇵🇱 POLAND | 4 | 4♠ | -1 | +12 | |
| +2.1 | Quarterfinal | 🇨🇳 CHINA | 5 | 6♦ | -2 | +13 | |
| +2.1 | Quarterfinal | 🇨🇳 CHINA | 35 | 1NTx | -1 | -1 | |
| +2.0 | Quarterfinal | 🇨🇳 CHINA | 32 | 5♦x | -3 | +2 | |
| +1.7 | Quarterfinal | 🇨🇳 CHINA | 12 | 4♥ | +1 | +0 | |
| +1.0 | Quarterfinal | 🇨🇳 CHINA | 33 | 4♥x | -1 | +0 | |
| +1.0 | Semifinal | 🇮🇳 INDIA | 6 | 4♠ | ♥4 | +1 | +0 |
| +1.0 | Semifinal | 🇮🇳 INDIA | 17 | 3NT | ♣7 | +2 | +1 |
| +1.0 | Semifinal | 🇮🇳 INDIA | 32 | 4♠x | -2 | +0 | |
| +1.0 | Final | 🇵🇱 POLAND | 33 | 2♦ | ♠A | -1 | +12 |
| +0.7 | Semifinal | 🇮🇳 INDIA | 8 | 2♠ | ♥9 | = | +5 |
| +0.7 | Final | 🇵🇱 POLAND | 25 | 3NT | ♣7 | +1 | +0 |
| +0.4 | Quarterfinal | 🇨🇳 CHINA | 8 | 2♥ | +1 | +1 | |
| +0.3 | Quarterfinal | 🇨🇳 CHINA | 25 | 4♥ | = | +0 | |
| -0.0 | Quarterfinal | 🇨🇳 CHINA | 2 | 4♠ | +1 | +10 | |
| -0.0 | Quarterfinal | 🇨🇳 CHINA | 28 | 4♠ | +1 | +0 | |
| -0.0 | Semifinal | 🇮🇳 INDIA | 11 | 4♥ | ♦7 | = | +0 |
| -0.0 | Semifinal | 🇮🇳 INDIA | 21 | 5♦ | ♠8 | -1 | -6 |
| +0.0 | Semifinal | 🇮🇳 INDIA | 25 | 4♥ | +1 | +0 | |
| +0.0 | Semifinal | 🇮🇳 INDIA | 28 | 3NT | +2 | +0 | |
| -0.0 | Final | 🇵🇱 POLAND | 2 | Adj. | +14 | ||
| +0.0 | Final | 🇵🇱 POLAND | 18 | 3NT | ♦4 | +1 | +0 |
| +0.0 | Final | 🇵🇱 POLAND | 23 | 3NT | ♥T | = | +0 |
| +0.0 | Final | 🇵🇱 POLAND | 27 | 3NT | ♠3 | +1 | +0 |
| -0.3 | Semifinal | 🇮🇳 INDIA | 3 | 3NT | ♠5 | +1 | -1 |
| -0.3 | Final | 🇵🇱 POLAND | 10 | 3♣ | +1 | +0 | |
| -0.3 | Final | 🇵🇱 POLAND | 14 | 3♥ | ♣A | = | +0 |
| -0.7 | Semifinal | 🇮🇳 INDIA | 19 | 5♥ | ♦3 | +1 | +12 |
| -0.7 | Final | 🇵🇱 POLAND | 7 | 2♣ | = | -1 | |
| -0.7 | Final | 🇵🇱 POLAND | 9 | 6♥ | = | +11 | |
| -0.7 | Final | 🇵🇱 POLAND | 35 | 5♦ | ♣J | = | -11 |
| -1.0 | Semifinal | 🇮🇳 INDIA | 9 | 5♣ | ♠K | +1 | -10 |
| -1.0 | Final | 🇵🇱 POLAND | 6 | 2NT | = | +0 | |
| -1.3 | Final | 🇵🇱 POLAND | 29 | 4♥ | ♠5 | +2 | -2 |
| -1.4 | Quarterfinal | 🇨🇳 CHINA | 27 | 2♥ | +3 | +6 | |
| -1.7 | Final | 🇵🇱 POLAND | 15 | 5♦ | ♣7 | -1 | +6 |
| -2.1 | Quarterfinal | 🇨🇳 CHINA | 30 | 4♠ | = | -11 | |
| -2.3 | Semifinal | 🇮🇳 INDIA | 1 | 3NT | ♥4 | -3 | -6 |
| -2.3 | Final | 🇵🇱 POLAND | 19 | 4♥ | ♠9 | -2 | -8 |
| -2.3 | Final | 🇵🇱 POLAND | 24 | 2♦ | ♦7 | -1 | +1 |
| -2.3 | Final | 🇵🇱 POLAND | 32 | 1NT | ♥3 | = | -5 |
| -3.7 | Semifinal | 🇮🇳 INDIA | 26 | 3♥ | = | +0 | |
| -4.3 | Semifinal | 🇮🇳 INDIA | 12 | 4♥ | ♠Q | = | -3 |
| -6.1 | Quarterfinal | 🇨🇳 CHINA | 1 | 3NT | +1 | -1 | |
| -6.7 | Semifinal | 🇮🇳 INDIA | 31 | 2♠ | = | -10 | |
| -6.7 | Final | 🇵🇱 POLAND | 36 | 3NT | ♦K | = | -6 |
| -8.0 | Final | 🇵🇱 POLAND | 28 | 4♥ | ♦J | -1 | -12 |
| -9.3 | Semifinal | 🇮🇳 INDIA | 30 | 6♥ | -1 | -14 | |
| -10.0 | Final | 🇵🇱 POLAND | 21 | 7NT | ♣9 | = | +0 |
| -11.0 | Final | 🇵🇱 POLAND | 5 | 6♠ | -1 | -11 | |
| -11.3 | Final | 🇵🇱 POLAND | 3 | 1NTx | -3 | -9 | |
| -12.0 | Final | 🇵🇱 POLAND | 31 | 4♥x | ♠A | -3 | -5 |
| -12.7 | Semifinal | 🇮🇳 INDIA | 34 | 4♥x | +1 | -8 | |
| -15.7 | Final | 🇵🇱 POLAND | 30 | 6NT | ♣A | = | +0 |