🇹🇼 CHEN Tzu An · CHINESE TAIPEI
85rank
-32.7Butler · 104 bds
-0.31per board
±4.2swing
-0.29vs par /bd · #75/105
-0.49adjusted /bd
by round
vs par split: bidding -0.33 · play +0.04
Strength of schedule: opponents averaged -0.18/bd (an easy draw) → opponent-adjusted -0.49/bd
Card play — on target: opening leads 96.2% #2 of 105 · declarer play 68.2% #76 of 105 · defence 75.0% #95 of 105
Bidding activity — not a pass: 44.6% #42 of 105 (125/280)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 100.0% (6) | 95.0% (20) |
| Declarer play | 60.0% (5) | 70.6% (17) |
| Defence | 69.2% (13) | 76.9% (39) |
Opening leads by suit led: ♠ 100.0% (9) · ♥ 83.3% (6) · ♦ 100.0% (7) · ♣ 100.0% (4)
vs par by strain: NT +0.04 (28) · a suit -0.41 (76)
vs par by level: part-score -0.04 (46) · game -0.66 (53) · slam +1.40 (5)
By role: declaring -0.65/bd (-2.10 vs par · 52) · defending +0.03/bd (+1.52 vs par · 52)
By vulnerability: vulnerable -0.51/bd (-0.90 vs par · 52) · not vulnerable -0.12/bd (+0.33 vs par · 52)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | X.Lin | M.Larsen – P.Hammelev | Closed | 8 | -25.0 | -3.12 | -1.38 |
| Round 2 | X.Lin | T.Chowdhury – M.Prakash | Open | 8 | +27.5 | +3.44 | +4.38 |
| Round 3 | X.Lin | P.Ter Maat – L.Hakvoort | Closed | 8 | -8.9 | -1.11 | -1.38 |
| Round 5 | X.Lin | T.Gold – T.Langdon Macmillan | Open | 8 | -10.2 | -1.27 | -0.62 |
| Round 6 | X.Lin | A.Gong – B.Ge | Open | 8 | -8.2 | -1.02 | -1.00 |
| Round 9 | X.Lin | D.Balof – A.Silverstein | Closed | 8 | +18.7 | +2.34 | +1.50 |
| Round 10 | X.Lin | L.Petelko – K.Retter | Closed | 8 | +15.0 | +1.88 | +1.00 |
| Round 11 | X.Lin | W.Okrzesik – K.Kuflowski | Open | 8 | -20.3 | -2.54 | -2.62 |
| Round 12 | X.Lin | J.Nordby – J.Bjoerkan | Closed | 8 | -13.9 | -1.74 | +0.12 |
| Round 14 | X.Lin | S.Chan – C.Hui | Closed | 8 | -5.9 | -0.74 | +0.88 |
| Round 15 | X.Lin | D.Biborka – M.Juhasz-Molnar | Closed | 8 | +3.7 | +0.46 | -1.75 |
| Round 17 | X.Lin | K.Allas – J.Gusson | Closed | 8 | -0.5 | -0.06 | -0.88 |
| Round 19 | X.Lin | A.Nilsson – M.Bjoerk Heed | Open | 8 | -4.7 | -0.59 | -2.00 |
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.
| Butler | Round | Opponents | Bd | Contract | Lead | Res | vs par |
|---|---|---|---|---|---|---|---|
| +12.0 | Round 19 | 🇸🇪 SWEDEN | 23 | 3NT | ♥6 | -2 | +17 |
| +11.8 | Round 9 | 🇺🇸 USA1 | 4 | 3NT | ♠8 | = | +10 |
| +9.7 | Round 15 | 🇭🇺 HUNGARY | 22 | 6NT | ♠T | -1 | +13 |
| +7.5 | Round 10 | 🇮🇱 ISRAEL | 12 | 6♦x | ♣Q | -2 | +7 |
| +7.1 | Round 2 | 🇮🇳 INDIA | 14 | 4♠ | ♠T | -1 | +4 |
| +7.1 | Round 10 | 🇮🇱 ISRAEL | 13 | 6♠ | ♥J | +1 | -13 |
| +6.9 | Round 10 | 🇮🇱 ISRAEL | 9 | 4♠ | ♥T | +2 | +11 |
| +6.1 | Round 2 | 🇮🇳 INDIA | 13 | 3♥ | ♣A | = | +7 |
| +5.8 | Round 14 | 🇭🇰 HONG KONG CHINA | 10 | 5♣ | ♠J | = | +0 |
| +5.7 | Round 2 | 🇮🇳 INDIA | 10 | 2NT | ♥A | -3 | +9 |
| +5.7 | Round 9 | 🇺🇸 USA1 | 1 | 4♠ | ♥4 | = | +1 |
| +4.0 | Round 17 | 🇪🇪 ESTONIA | 5 | 3NT | ♣K | +1 | -1 |
| +3.9 | Round 15 | 🇭🇺 HUNGARY | 17 | 3NT | ♠2 | +1 | +1 |
| +3.8 | Round 9 | 🇺🇸 USA1 | 7 | 3♠ | ♦A | -1 | +0 |
| +3.5 | Round 6 | 🇺🇸 USA2 | 9 | 4♥ | ♦3 | -1 | +5 |
| +3.4 | Round 11 | 🇵🇱 POLAND | 23 | 3NT | ♦J | = | -1 |
| +3.3 | Round 2 | 🇮🇳 INDIA | 16 | 2♠ | ♦T | = | +6 |
| +2.9 | Round 2 | 🇮🇳 INDIA | 12 | 4♥ | ♠A | -1 | +5 |
| +2.8 | Round 3 | 🇳🇱 NETHERLANDS | 17 | 4♥ | ♠K | -1 | +5 |
| +2.6 | Round 2 | 🇮🇳 INDIA | 15 | 4♠ | ♥7 | -1 | +10 |
| +2.5 | Round 9 | 🇺🇸 USA1 | 2 | 3♦ | ♣5 | -1 | +5 |
| +2.3 | Round 3 | 🇳🇱 NETHERLANDS | 18 | 3♥ | ♦4 | +1 | +2 |
| +2.3 | Round 12 | 🇳🇴 NORWAY | 27 | 1NT | ♠6 | +1 | +7 |
| +2.3 | Round 17 | 🇪🇪 ESTONIA | 4 | 2♥ | ♦A | = | +6 |
| +2.1 | Round 19 | 🇸🇪 SWEDEN | 22 | 2♥ | ♣T | = | -1 |
| +2.0 | Round 12 | 🇳🇴 NORWAY | 28 | 4♠ | ♦6 | = | +7 |
| +1.9 | Round 3 | 🇳🇱 NETHERLANDS | 21 | 4♣ | ♠4 | -4 | +2 |
| +1.9 | Round 11 | 🇵🇱 POLAND | 17 | 2♠ | ♠2 | +1 | +0 |
| +1.9 | Round 15 | 🇭🇺 HUNGARY | 24 | 4♥ | ♠8 | = | +0 |
| +1.7 | Round 6 | 🇺🇸 USA2 | 14 | 6♥ | ♣A | = | +0 |
| +1.6 | Round 9 | 🇺🇸 USA1 | 6 | 3♠ | ♣Q | -2 | +8 |
| +1.2 | Round 5 | 🇦🇺 AUSTRALIA | 6 | 2NT | ♣A | +1 | +10 |
| +1.1 | Round 5 | 🇦🇺 AUSTRALIA | 3 | 4♠ | ♦4 | = | +0 |
| +0.8 | Round 17 | 🇪🇪 ESTONIA | 2 | 2♠ | ♣A | -2 | +2 |
| +0.7 | Round 5 | 🇦🇺 AUSTRALIA | 1 | 4♠ | ♥8 | -2 | +5 |
| +0.6 | Round 11 | 🇵🇱 POLAND | 19 | 3NT | ♦4 | = | +0 |
| +0.6 | Round 14 | 🇭🇰 HONG KONG CHINA | 16 | 2♠ | ♥Q | +3 | +9 |
| +0.4 | Round 6 | 🇺🇸 USA2 | 16 | 3♥ | ♠Q | -1 | +2 |
| +0.4 | Round 17 | 🇪🇪 ESTONIA | 3 | 3♣ | ♠K | -1 | +4 |
| +0.3 | Round 2 | 🇮🇳 INDIA | 11 | 3♠ | ♣A | -3 | -6 |
| +0.3 | Round 17 | 🇪🇪 ESTONIA | 1 | 4♠ | ♣J | +2 | -11 |
| +0.2 | Round 3 | 🇳🇱 NETHERLANDS | 20 | 3NT | ♦4 | +1 | +1 |
| +0.2 | Round 19 | 🇸🇪 SWEDEN | 19 | 3NT | ♣2 | -1 | -16 |
| +0.1 | Round 12 | 🇳🇴 NORWAY | 29 | 2♠ | ♣A | = | +0 |
| +0.1 | Round 14 | 🇭🇰 HONG KONG CHINA | 9 | 2♦ | ♦A | -1 | +2 |
| +0.1 | Round 15 | 🇭🇺 HUNGARY | 19 | 4♠ | ♥A | = | -1 |
| -0.1 | Round 5 | 🇦🇺 AUSTRALIA | 7 | 4♠ | ♦7 | = | +0 |
| -0.2 | Round 1 | 🇩🇰 DENMARK | 7 | 4♠ | ♦K | = | +0 |
| -0.3 | Round 6 | 🇺🇸 USA2 | 11 | 2♠ | ♦J | -2 | +0 |
| -0.3 | Round 14 | 🇭🇰 HONG KONG CHINA | 12 | 3NT | ♣5 | +2 | +0 |
| -0.4 | Round 1 | 🇩🇰 DENMARK | 8 | 1NT | ♥5 | -2 | +8 |
| -0.4 | Round 3 | 🇳🇱 NETHERLANDS | 19 | 2♠ | ♦J | = | +0 |
| -0.4 | Round 6 | 🇺🇸 USA2 | 12 | 1NT | ♥6 | +1 | -5 |
| -0.5 | Round 2 | 🇮🇳 INDIA | 9 | 4♠ | ♥2 | = | +0 |
| -0.5 | Round 10 | 🇮🇱 ISRAEL | 11 | 3NT | ♥4 | = | +2 |
| -0.5 | Round 10 | 🇮🇱 ISRAEL | 14 | 3♣ | ♥6 | -1 | -3 |
| -0.6 | Round 9 | 🇺🇸 USA1 | 5 | 1NT | ♦3 | +2 | -1 |
| -0.6 | Round 12 | 🇳🇴 NORWAY | 32 | 4♥ | ♣K | +1 | +0 |
| -0.6 | Round 15 | 🇭🇺 HUNGARY | 20 | 4♠ | ♦Q | -2 | -9 |
| -0.7 | Round 1 | 🇩🇰 DENMARK | 4 | 2♠ | ♣Q | +1 | +0 |
| -0.9 | Round 19 | 🇸🇪 SWEDEN | 17 | 4♠ | ♦Q | +1 | +0 |
| -1.0 | Round 10 | 🇮🇱 ISRAEL | 15 | 1NT | ♠K | +1 | -1 |
| -1.1 | Round 12 | 🇳🇴 NORWAY | 25 | 1♠ | ♥A | +2 | +7 |
| -1.2 | Round 14 | 🇭🇰 HONG KONG CHINA | 15 | 2♠ | ♣4 | +1 | +0 |
| -1.3 | Round 19 | 🇸🇪 SWEDEN | 18 | 4♦ | ♥2 | -1 | +2 |
| -1.4 | Round 14 | 🇭🇰 HONG KONG CHINA | 13 | 4♠ | ♣T | +1 | +0 |
| -1.5 | Round 12 | 🇳🇴 NORWAY | 31 | 4♠ | ♠7 | +2 | -11 |
| -1.6 | Round 9 | 🇺🇸 USA1 | 8 | 4♠ | ♦T | -1 | -5 |
| -1.7 | Round 6 | 🇺🇸 USA2 | 13 | 4♥ | ♦8 | +1 | +0 |
| -1.9 | Round 15 | 🇭🇺 HUNGARY | 21 | 4♥ | ♦K | = | +0 |
| -2.2 | Round 1 | 🇩🇰 DENMARK | 5 | 5♠ | ♥T | -1 | +9 |
| -2.2 | Round 10 | 🇮🇱 ISRAEL | 16 | 3♣ | ♥T | -2 | +5 |
| -2.2 | Round 11 | 🇵🇱 POLAND | 20 | 2NT | ♥5 | +1 | -1 |
| -2.2 | Round 17 | 🇪🇪 ESTONIA | 7 | 3♠ | ♦6 | +2 | -2 |
| -2.3 | Round 10 | 🇮🇱 ISRAEL | 10 | 6♠x | ♣K | -2 | +0 |
| -2.3 | Round 11 | 🇵🇱 POLAND | 22 | 4♠ | ♥3 | +2 | +1 |
| -2.4 | Round 5 | 🇦🇺 AUSTRALIA | 2 | 4♥ | ♣A | -1 | +1 |
| -2.5 | Round 1 | 🇩🇰 DENMARK | 6 | 1NT | ♥3 | -1 | -4 |
| -2.7 | Round 17 | 🇪🇪 ESTONIA | 6 | 4♥ | ♦4 | = | +0 |
| -2.8 | Round 3 | 🇳🇱 NETHERLANDS | 24 | 4♠ | ♣4 | -1 | -5 |
| -2.8 | Round 5 | 🇦🇺 AUSTRALIA | 5 | 2♠ | ♥A | = | -9 |
| -3.1 | Round 1 | 🇩🇰 DENMARK | 1 | 4♠x | ♦A | -1 | -8 |
| -3.3 | Round 19 | 🇸🇪 SWEDEN | 24 | 4♠ | ♣2 | -1 | -5 |
| -3.4 | Round 17 | 🇪🇪 ESTONIA | 8 | 3NT | ♥K | -1 | -5 |
| -3.9 | Round 5 | 🇦🇺 AUSTRALIA | 4 | 3♥ | ♠T | = | -7 |
| -3.9 | Round 19 | 🇸🇪 SWEDEN | 21 | 2♠ | ♥5 | = | +0 |
| -4.0 | Round 5 | 🇦🇺 AUSTRALIA | 8 | 2NT | ♠5 | -2 | -5 |
| -4.5 | Round 3 | 🇳🇱 NETHERLANDS | 22 | 2NT | ♠3 | +3 | -5 |
| -4.5 | Round 9 | 🇺🇸 USA1 | 3 | 1NT | ♠J | -2 | -6 |
| -4.6 | Round 14 | 🇭🇰 HONG KONG CHINA | 11 | 4♠ | ♣4 | +1 | -4 |
| -4.6 | Round 15 | 🇭🇺 HUNGARY | 23 | 2♠ | ♦6 | = | -12 |
| -4.8 | Round 15 | 🇭🇺 HUNGARY | 18 | 2♣ | ♦4 | -1 | -6 |
| -4.9 | Round 14 | 🇭🇰 HONG KONG CHINA | 14 | 4♥ | ♦Q | +1 | +0 |
| -5.1 | Round 12 | 🇳🇴 NORWAY | 30 | 3NT | ♦J | = | +1 |
| -5.4 | Round 6 | 🇺🇸 USA2 | 10 | 4♦ | ♥A | +1 | -10 |
| -6.0 | Round 6 | 🇺🇸 USA2 | 15 | 4♠ | ♥3 | = | +0 |
| -6.5 | Round 11 | 🇵🇱 POLAND | 24 | 5♦ | ♠A | = | +1 |
| -6.9 | Round 11 | 🇵🇱 POLAND | 18 | 3NT | ♥K | -3 | -14 |
| -7.2 | Round 1 | 🇩🇰 DENMARK | 3 | 3NT | ♣J | -2 | -6 |
| -8.3 | Round 11 | 🇵🇱 POLAND | 21 | 3NT | ♠K | = | -7 |
| -8.4 | Round 3 | 🇳🇱 NETHERLANDS | 23 | 3♥ | ♣5 | = | -11 |
| -8.7 | Round 1 | 🇩🇰 DENMARK | 2 | 4♠ | ♠6 | -3 | -10 |
| -9.6 | Round 19 | 🇸🇪 SWEDEN | 20 | 5♠ | ♦5 | -1 | -13 |
| -10.0 | Round 12 | 🇳🇴 NORWAY | 26 | 3♠ | ♣K | +1 | -10 |