🇹🇼 CHEN Chiao-En · CHINESE TAIPEI
30rank
+38.9Butler · 88 bds
+0.44per board
±4.4swing
+0.80vs par /bd · #12/105
+0.47adjusted /bd
by round
vs par split: bidding +0.26 · play +0.53
Strength of schedule: opponents averaged +0.02/bd (an average draw) → opponent-adjusted +0.47/bd
Card play — on target: opening leads 88.0% #17 of 105 · declarer play 92.3% #1 of 105 · defence 74.0% #99 of 105
Bidding activity — not a pass: 38.0% #97 of 105 (92/242)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 77.8% (9) | 93.8% (16) |
| Declarer play | 66.7% (3) | 100.0% (10) |
| Defence | 69.2% (13) | 75.7% (37) |
Opening leads by suit led: ♠ 60.0% (5) · ♥ 100.0% (3) · ♦ 100.0% (5) · ♣ 91.7% (12)
vs par by strain: NT +0.50 (28) · a suit +0.93 (60)
vs par by level: part-score +0.62 (37) · game +0.40 (47) · slam +7.00 (4)
By role: declaring -0.22/bd (-1.74 vs par · 38) · defending +0.94/bd (+2.72 vs par · 50)
By vulnerability: vulnerable -0.13/bd (+1.04 vs par · 44) · not vulnerable +1.02/bd (+0.55 vs par · 44)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 2 | H.Tsai | G.Gupta – A.Mehta | Closed | 8 | +15.5 | +1.94 | +0.62 |
| Round 4 | H.Tsai | B.Ochoa – D.Salaverri Bottaro | Open | 8 | +28.1 | +3.51 | +3.62 |
| Round 5 | H.Tsai | J.Wilkinson – A.Wilsmore | Closed | 8 | +9.0 | +1.12 | +0.38 |
| Round 7 | X.Lin | Y.Xiao – H.Asano | Closed | 8 | -0.3 | -0.04 | -0.88 |
| Round 9 | H.Tsai | M.Haas – S.Pahk | Open | 8 | -5.5 | -0.69 | +0.50 |
| Round 11 | H.Tsai | W.Wnuk – J.Kot | Closed | 8 | +2.4 | +0.30 | +0.50 |
| Round 13 | H.Tsai | X.Yan – X.Zhang | Closed | 8 | +1.3 | +0.16 | +2.50 |
| Round 15 | H.Tsai | D.Tokes – B.Zabradi | Open | 8 | -27.4 | -3.42 | -1.00 |
| Round 16 | H.Tsai | R.Kongsattra – P.Jindakul | Open | 8 | -13.8 | -1.73 | -1.50 |
| Round 17 | H.Tsai | A.Pedmanson – J.Vahk | Open | 8 | +11.8 | +1.48 | +1.75 |
| Round 18 | H.Tsai | C.Ben Guigui – E.Bonin | Open | 8 | +17.8 | +2.23 | +2.25 |
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 |
|---|---|---|---|---|---|---|---|
| +13.8 | Round 4 | 🇺🇾 URUGUAY | 32 | 6NT | ♠4 | -1 | +17 |
| +10.7 | Round 18 | 🇫🇷 FRANCE | 13 | 6♥ | ♣7 | -1 | +13 |
| +8.2 | Round 4 | 🇺🇾 URUGUAY | 31 | 3NT | ♠6 | = | +7 |
| +7.6 | Round 2 | 🇮🇳 INDIA | 15 | 3NT | ♥5 | = | -1 |
| +7.5 | Round 16 | 🇹🇭 THAILAND | 31 | 4♠ | ♥K | -2 | +2 |
| +7.5 | Round 17 | 🇪🇪 ESTONIA | 5 | 6NT | ♣K | -2 | +11 |
| +7.1 | Round 4 | 🇺🇾 URUGUAY | 27 | 4♥ | ♦Q | = | +0 |
| +7.1 | Round 18 | 🇫🇷 FRANCE | 16 | 3NT | ♠2 | +1 | +7 |
| +6.9 | Round 11 | 🇵🇱 POLAND | 18 | 3NT | ♥K | -3 | +14 |
| +6.5 | Round 7 | 🇯🇵 JAPAN | 22 | 3NT | ♣5 | -1 | +10 |
| +6.3 | Round 17 | 🇪🇪 ESTONIA | 2 | 2♦ | ♣A | +2 | +6 |
| +6.2 | Round 18 | 🇫🇷 FRANCE | 12 | 3NT | ♦3 | +2 | +2 |
| +5.9 | Round 9 | 🇺🇸 USA1 | 6 | 3♠ | ♥T | = | +0 |
| +5.4 | Round 13 | 🇨🇳 CHINA | 5 | 4♠ | ♣T | -1 | +5 |
| +4.8 | Round 5 | 🇦🇺 AUSTRALIA | 2 | 4♥x | ♠K | -1 | +2 |
| +4.7 | Round 2 | 🇮🇳 INDIA | 11 | 3♦ | ♣9 | -1 | +10 |
| +4.2 | Round 2 | 🇮🇳 INDIA | 10 | 4♠ | ♣A | -1 | +0 |
| +4.0 | Round 5 | 🇦🇺 AUSTRALIA | 8 | 3♥ | ♠K | -2 | +5 |
| +3.6 | Round 13 | 🇨🇳 CHINA | 1 | 2♠x | ♣9 | -2 | +12 |
| +3.5 | Round 5 | 🇦🇺 AUSTRALIA | 1 | 3♣ | ♦6 | -1 | -2 |
| +3.2 | Round 2 | 🇮🇳 INDIA | 12 | 3♥ | ♠A | +1 | +1 |
| +3.2 | Round 17 | 🇪🇪 ESTONIA | 3 | 3♦ | ♣6 | -1 | +0 |
| +3.1 | Round 17 | 🇪🇪 ESTONIA | 4 | 3♦ | ♥6 | -1 | -1 |
| +2.8 | Round 5 | 🇦🇺 AUSTRALIA | 5 | 4♥ | ♠8 | -1 | +9 |
| +2.7 | Round 2 | 🇮🇳 INDIA | 16 | 3♦ | ♥7 | = | +0 |
| +2.7 | Round 11 | 🇵🇱 POLAND | 22 | 5♠ | ♣A | = | +0 |
| +2.7 | Round 13 | 🇨🇳 CHINA | 7 | 5♠ | ♦T | +1 | +13 |
| +1.9 | Round 7 | 🇯🇵 JAPAN | 20 | 1♠ | ♠2 | +3 | +1 |
| +1.9 | Round 15 | 🇭🇺 HUNGARY | 21 | 4♥ | ♣5 | = | +0 |
| +1.6 | Round 4 | 🇺🇾 URUGUAY | 30 | 3♣ | ♦4 | -1 | +2 |
| +1.6 | Round 9 | 🇺🇸 USA1 | 8 | 3♠ | ♦T | -1 | +5 |
| +1.4 | Round 9 | 🇺🇸 USA1 | 7 | 3♦ | ♣K | -1 | +5 |
| +1.3 | Round 11 | 🇵🇱 POLAND | 21 | 1♥ | ♣A | -1 | -1 |
| +1.2 | Round 11 | 🇵🇱 POLAND | 20 | 1NT | ♥Q | +1 | +0 |
| +1.0 | Round 13 | 🇨🇳 CHINA | 8 | 3NT | ♥6 | +2 | +0 |
| +1.0 | Round 18 | 🇫🇷 FRANCE | 15 | 3NT | ♦6 | = | -2 |
| +0.8 | Round 7 | 🇯🇵 JAPAN | 24 | 3♦ | ♣A | = | +0 |
| +0.7 | Round 4 | 🇺🇾 URUGUAY | 25 | 2♠ | ♦Q | +3 | +6 |
| +0.7 | Round 17 | 🇪🇪 ESTONIA | 1 | 4♠ | ♥Q | +1 | +11 |
| +0.6 | Round 18 | 🇫🇷 FRANCE | 14 | 3♣ | ♠3 | -1 | -2 |
| +0.5 | Round 2 | 🇮🇳 INDIA | 9 | 4♠ | ♦6 | = | +0 |
| +0.3 | Round 16 | 🇹🇭 THAILAND | 28 | 4♠ | ♣Q | = | +6 |
| +0.1 | Round 5 | 🇦🇺 AUSTRALIA | 7 | 4♠ | ♥4 | = | +0 |
| -0.0 | Round 4 | 🇺🇾 URUGUAY | 26 | 1NT | ♠A | +3 | +10 |
| -0.0 | Round 7 | 🇯🇵 JAPAN | 17 | 3♣ | ♦A | -1 | -2 |
| -0.1 | Round 9 | 🇺🇸 USA1 | 4 | 4♥ | ♠9 | -1 | +6 |
| -0.2 | Round 7 | 🇯🇵 JAPAN | 21 | 3NT | ♥6 | +2 | -10 |
| -0.2 | Round 9 | 🇺🇸 USA1 | 5 | 2NT | ♦3 | = | +0 |
| -0.3 | Round 2 | 🇮🇳 INDIA | 13 | 3♥ | ♣K | -1 | -1 |
| -0.4 | Round 4 | 🇺🇾 URUGUAY | 29 | 3NT | ♥9 | +1 | +1 |
| -0.5 | Round 15 | 🇭🇺 HUNGARY | 23 | 3♠ | ♦2 | -1 | +11 |
| -0.7 | Round 16 | 🇹🇭 THAILAND | 27 | 4♥ | ♠7 | = | +1 |
| -0.7 | Round 18 | 🇫🇷 FRANCE | 9 | 5♥ | ♦T | +1 | -11 |
| -0.9 | Round 11 | 🇵🇱 POLAND | 17 | 2♥ | ♦A | -2 | +1 |
| -1.1 | Round 15 | 🇭🇺 HUNGARY | 19 | 4♠ | ♦A | +1 | +0 |
| -1.2 | Round 5 | 🇦🇺 AUSTRALIA | 6 | 2NT | ♥5 | +1 | -10 |
| -1.3 | Round 15 | 🇭🇺 HUNGARY | 18 | 2♥ | ♣Q | +1 | +0 |
| -1.4 | Round 17 | 🇪🇪 ESTONIA | 8 | 1NT | ♣7 | +1 | +0 |
| -1.5 | Round 11 | 🇵🇱 POLAND | 19 | 3NT | ♣2 | +1 | -1 |
| -1.5 | Round 13 | 🇨🇳 CHINA | 3 | 2♠ | ♥T | = | -5 |
| -1.5 | Round 16 | 🇹🇭 THAILAND | 30 | 4♠ | ♥K | = | +1 |
| -1.5 | Round 18 | 🇫🇷 FRANCE | 11 | 3NT | ♦6 | +1 | -1 |
| -1.6 | Round 13 | 🇨🇳 CHINA | 4 | 1NT | ♦2 | +2 | -1 |
| -1.7 | Round 7 | 🇯🇵 JAPAN | 18 | 3NT | ♠T | -1 | -4 |
| -1.9 | Round 15 | 🇭🇺 HUNGARY | 24 | 3NT | ♠7 | +1 | +0 |
| -2.1 | Round 5 | 🇦🇺 AUSTRALIA | 3 | 4♠ | ♣5 | +1 | -1 |
| -2.2 | Round 13 | 🇨🇳 CHINA | 2 | 3♣ | ♦A | +1 | -1 |
| -2.5 | Round 16 | 🇹🇭 THAILAND | 26 | 2♥ | ♣9 | -1 | -5 |
| -2.8 | Round 16 | 🇹🇭 THAILAND | 29 | 2♠ | ♦K | +2 | -1 |
| -2.9 | Round 4 | 🇺🇾 URUGUAY | 28 | 3NT | ♥3 | +1 | -14 |
| -2.9 | Round 5 | 🇦🇺 AUSTRALIA | 4 | 4♦ | ♣A | = | +0 |
| -2.9 | Round 17 | 🇪🇪 ESTONIA | 6 | 3♥ | ♠K | +1 | -6 |
| -3.2 | Round 7 | 🇯🇵 JAPAN | 19 | 4♥ | ♣J | = | +0 |
| -3.4 | Round 11 | 🇵🇱 POLAND | 23 | 3NT | ♦J | = | +1 |
| -3.9 | Round 11 | 🇵🇱 POLAND | 24 | 5♦ | ♠A | -1 | -10 |
| -3.9 | Round 15 | 🇭🇺 HUNGARY | 17 | 3NT | ♠4 | +1 | -1 |
| -4.4 | Round 7 | 🇯🇵 JAPAN | 23 | 5♣ | ♠2 | -2 | -2 |
| -4.4 | Round 9 | 🇺🇸 USA1 | 3 | 4♠ | ♣3 | -3 | -5 |
| -4.5 | Round 9 | 🇺🇸 USA1 | 2 | 3♥ | ♣K | = | -7 |
| -4.7 | Round 17 | 🇪🇪 ESTONIA | 7 | 3♥ | ♣A | = | -7 |
| -4.8 | Round 16 | 🇹🇭 THAILAND | 32 | 3NT | ♥7 | -2 | -8 |
| -5.2 | Round 9 | 🇺🇸 USA1 | 1 | 3NT | ♣2 | = | +0 |
| -5.6 | Round 18 | 🇫🇷 FRANCE | 10 | 4♠ | ♥8 | +1 | +12 |
| -6.1 | Round 13 | 🇨🇳 CHINA | 6 | 4♥x | ♠A | -1 | -3 |
| -7.1 | Round 2 | 🇮🇳 INDIA | 14 | 4♠ | ♣5 | -1 | -4 |
| -9.3 | Round 16 | 🇹🇭 THAILAND | 25 | 5♦ | ♠J | -2 | -8 |
| -9.7 | Round 15 | 🇭🇺 HUNGARY | 22 | 6NT | ♠T | -1 | -13 |
| -10.9 | Round 15 | 🇭🇺 HUNGARY | 20 | 4♠x | ♦Q | -3 | -5 |