🇹🇼 YEH Chen · CHINESE TAIPEI
110rank
-45.9Butler · 140 bds
-0.33per board
±4.5swing
+0.15vs par /bd
-0.18adjusted /bd
by round
vs par split: bidding -0.09 · play +0.02
Strength of schedule: opponents averaged +0.15/bd (a tough draw) → opponent-adjusted -0.18/bd
Card play — on target: opening leads 88.9% · declarer play 53.1% · defence 90.7%
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | · | 88.9% (9) |
| Declarer play | · | 53.1% (32) |
| Defence | · | 90.7% (43) |
Opening leads by suit led: ♠ 50.0% (2) · ♥ 100.0% (2) · ♦ 100.0% (2) · ♣ 100.0% (3)
vs par by strain: a suit -0.07 (96)
vs par by level: part-score -0.14 (44) · game -0.07 (44) · slam +0.25 (8)
By role: declaring -0.33/bd (-1.66 vs par · 71) · defending -0.33/bd (+2.01 vs par · 69)
By vulnerability: vulnerable -0.69/bd (-0.30 vs par · 70) · not vulnerable +0.03/bd (+0.60 vs par · 70)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | C.Shen | J.Verhees – J.Jansma | Closed | 20 | +12.5 | +0.62 | +1.35 |
| Round 5 | C.Shen | L.Palazzo – W.Fornasari | Closed | 20 | -9.0 | -0.45 | -0.25 |
| Round 7 | C.Shen | A.Gromov – A.Dubinin | Closed | 20 | +6.8 | +0.34 | +1.50 |
| Round 10 | C.Shen | F.Nystrom – P.Bertheau | Closed | 20 | -32.0 | -1.60 | -1.05 |
| Round 13 | C.Shen | T.Cope – G.Holman | Closed | 20 | -47.6 | -2.38 | -2.65 |
| Round 17 | C.Shen | R.Ekeblad – R.Rubin | Closed | 20 | +11.1 | +0.55 | +0.10 |
| Round 20 | C.Shen | R.Freeman – N.Nickell | Closed | 20 | +12.3 | +0.61 | +2.05 |
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 | Round 20 | 🇺🇸 USA 1 | 6 | 7♣ | ♠A | -2 | +14 |
| +10.2 | Round 1 | 🇳🇱 NETHERLANDS | 6 | 3N | ♦Q | = | +12 |
| +8.5 | Round 17 | 🇺🇸 USA 2 | 7 | 4♠ | ♦J | -1 | +7 |
| +8.3 | Round 17 | 🇺🇸 USA 2 | 20 | 3♣ | ♥A | = | +6 |
| +8.1 | Round 5 | 🇦🇷 ARGENTINA | 20 | 4♥ | ♠A | -1 | +12 |
| +8.0 | Round 17 | 🇺🇸 USA 2 | 12 | 4♥ | ♠10 | = | +11 |
| +7.4 | Round 7 | 🇷🇺 RUSSIA | 1 | 7♥ | ♥4 | = | +0 |
| +7.3 | Round 13 | 🇿🇦 SOUTH AFRICA | 20 | 2♠ | ♠3 | = | +12 |
| +6.7 | Round 1 | 🇳🇱 NETHERLANDS | 2 | 3N | ♠3 | -2 | +2 |
| +6.2 | Round 10 | 🇸🇪 SWEDEN | 11 | 4♥ | ♦5 | = | +8 |
| +5.7 | Round 7 | 🇷🇺 RUSSIA | 18 | 3N | ♥6 | -1 | +6 |
| +5.7 | Round 13 | 🇿🇦 SOUTH AFRICA | 1 | 4♠ | ♦10 | -1 | +5 |
| +5.4 | Round 10 | 🇸🇪 SWEDEN | 13 | 1N | ♥2 | = | +0 |
| +5.4 | Round 20 | 🇺🇸 USA 1 | 12 | 3N | ♥10 | = | +0 |
| +4.8 | Round 1 | 🇳🇱 NETHERLANDS | 19 | 3N | ♥10 | -1 | +10 |
| +4.8 | Round 7 | 🇷🇺 RUSSIA | 6 | 4♠ | ♣K | -1 | +10 |
| +4.8 | Round 20 | 🇺🇸 USA 1 | 4 | 3N | ♠7 | +1 | +10 |
| +4.5 | Round 5 | 🇦🇷 ARGENTINA | 19 | 4♠ | ♦4 | +2 | +13 |
| +4.3 | Round 1 | 🇳🇱 NETHERLANDS | 9 | 2♠ | ♥2 | = | +0 |
| +4.2 | Round 17 | 🇺🇸 USA 2 | 15 | 3♠ | ♥K | +2 | +11 |
| +4.0 | Round 17 | 🇺🇸 USA 2 | 16 | 2♠ | ♣K | = | +6 |
| +3.9 | Round 7 | 🇷🇺 RUSSIA | 20 | 3N | ♦9 | -2 | +3 |
| +3.9 | Round 17 | 🇺🇸 USA 2 | 3 | 2N | ♠3 | = | +0 |
| +3.7 | Round 17 | 🇺🇸 USA 2 | 8 | 3N | ♣A | -2 | +5 |
| +3.3 | Round 5 | 🇦🇷 ARGENTINA | 3 | 5♣x | ♦K | = | +4 |
| +3.3 | Round 5 | 🇦🇷 ARGENTINA | 9 | 3N | ♣K | = | +0 |
| +3.3 | Round 7 | 🇷🇺 RUSSIA | 15 | 3♠ | ♠4 | +1 | +10 |
| +3.3 | Round 13 | 🇿🇦 SOUTH AFRICA | 12 | 2N | ♦J | = | +6 |
| +3.2 | Round 20 | 🇺🇸 USA 1 | 3 | 3N | ♦10 | +2 | +1 |
| +3.0 | Round 1 | 🇳🇱 NETHERLANDS | 3 | 2♦x | ♠7 | -1 | +5 |
| +3.0 | Round 7 | 🇷🇺 RUSSIA | 17 | 3♠ | ♣J | +1 | +6 |
| +3.0 | Round 10 | 🇸🇪 SWEDEN | 18 | 4♠ | ♣6 | +2 | +11 |
| +2.8 | Round 1 | 🇳🇱 NETHERLANDS | 5 | 4♥ | ♠6 | -2 | +7 |
| +2.8 | Round 20 | 🇺🇸 USA 1 | 16 | 2♠ | ♦K | +1 | +1 |
| +2.7 | Round 7 | 🇷🇺 RUSSIA | 10 | 3♥ | ♥7 | = | +6 |
| +2.7 | Round 10 | 🇸🇪 SWEDEN | 3 | 6♥ | ♣3 | -1 | +17 |
| +2.6 | Round 13 | 🇿🇦 SOUTH AFRICA | 9 | 3N | ♠3 | +1 | +0 |
| +2.4 | Round 7 | 🇷🇺 RUSSIA | 2 | 2♠ | ♥10 | +3 | +9 |
| +2.2 | Round 20 | 🇺🇸 USA 1 | 15 | 3♠ | ♥A | -1 | +4 |
| +2.0 | Round 5 | 🇦🇷 ARGENTINA | 5 | 3♥ | ♦4 | +1 | +6 |
| +2.0 | Round 7 | 🇷🇺 RUSSIA | 4 | 3N | ♣4 | +2 | +1 |
| +2.0 | Round 20 | 🇺🇸 USA 1 | 10 | 4♥ | ♠4 | = | +9 |
| +2.0 | Round 20 | 🇺🇸 USA 1 | 14 | 5♥ | ♦J | -1 | +8 |
| +1.9 | Round 20 | 🇺🇸 USA 1 | 1 | 3♣ | ♦4 | -1 | +9 |
| +1.7 | Round 1 | 🇳🇱 NETHERLANDS | 17 | 3♦ | ♣6 | +2 | +6 |
| +1.5 | Round 1 | 🇳🇱 NETHERLANDS | 15 | 1N | ♥J | +1 | +9 |
| +1.2 | Round 1 | 🇳🇱 NETHERLANDS | 12 | 4♠ | ♦K | = | +0 |
| +1.2 | Round 10 | 🇸🇪 SWEDEN | 7 | 2♥ | ♣3 | = | -1 |
| +1.2 | Round 10 | 🇸🇪 SWEDEN | 15 | 1N | ♣10 | = | +7 |
| +0.9 | Round 1 | 🇳🇱 NETHERLANDS | 18 | 3N | ♠9 | +4 | +3 |
| +0.9 | Round 17 | 🇺🇸 USA 2 | 1 | 4♥ | ♦6 | +1 | -11 |
| +0.9 | Round 17 | 🇺🇸 USA 2 | 6 | 2♠ | ♥2 | = | +0 |
| +0.8 | Round 1 | 🇳🇱 NETHERLANDS | 7 | 4♠ | ♥2 | +1 | +0 |
| +0.8 | Round 17 | 🇺🇸 USA 2 | 4 | 3N | ♣J | +1 | +1 |
| +0.8 | Round 20 | 🇺🇸 USA 1 | 11 | 3N | ♥5 | +1 | +1 |
| +0.6 | Round 5 | 🇦🇷 ARGENTINA | 2 | 3N | ♦9 | +1 | +0 |
| +0.6 | Round 5 | 🇦🇷 ARGENTINA | 7 | 4♣ | ♠A | +1 | -1 |
| +0.6 | Round 20 | 🇺🇸 USA 1 | 9 | 2♦ | ♥K | = | -7 |
| +0.5 | Round 5 | 🇦🇷 ARGENTINA | 8 | 2N | ♠A | = | +1 |
| +0.5 | Round 5 | 🇦🇷 ARGENTINA | 16 | 4♥ | ♦4 | -1 | -4 |
| +0.5 | Round 10 | 🇸🇪 SWEDEN | 4 | 5♦ | ♥J | = | +13 |
| +0.4 | Round 1 | 🇳🇱 NETHERLANDS | 8 | 4♠ | ♥7 | = | -1 |
| +0.4 | Round 7 | 🇷🇺 RUSSIA | 9 | 3N | ♥Q | +1 | +0 |
| +0.3 | Round 13 | 🇿🇦 SOUTH AFRICA | 16 | 2N | ♥3 | +1 | +7 |
| +0.1 | Round 1 | 🇳🇱 NETHERLANDS | 14 | 4♥ | ♣K | -1 | +4 |
| +0.1 | Round 5 | 🇦🇷 ARGENTINA | 11 | 2♥ | ♦K | = | +0 |
| +0.0 | Round 5 | 🇦🇷 ARGENTINA | 6 | 4♠ | ♣4 | = | +13 |
| +0.0 | Round 10 | 🇸🇪 SWEDEN | 9 | 2♥ | ♣10 | +1 | -7 |
| +0.0 | Round 13 | 🇿🇦 SOUTH AFRICA | 7 | 4♠ | ♦2 | = | -1 |
| +0.0 | Round 13 | 🇿🇦 SOUTH AFRICA | 8 | 4♠ | ♥4 | = | +0 |
| -0.0 | Round 20 | 🇺🇸 USA 1 | 19 | 3♣ | ♠J | -2 | +11 |
| +0.0 | Round 20 | 🇺🇸 USA 1 | 20 | 4♥ | ♦A | = | +0 |
| -0.1 | Round 5 | 🇦🇷 ARGENTINA | 1 | 2♥ | ♣A | = | +0 |
| -0.1 | Round 7 | 🇷🇺 RUSSIA | 5 | 4N | ♥K | +1 | +0 |
| -0.2 | Round 1 | 🇳🇱 NETHERLANDS | 1 | 4♥ | ♣6 | +1 | -11 |
| -0.2 | Round 13 | 🇿🇦 SOUTH AFRICA | 2 | 4♥ | ♣2 | = | -1 |
| -0.2 | Round 20 | 🇺🇸 USA 1 | 8 | 3♦ | ♥3 | -3 | -2 |
| -0.3 | Round 17 | 🇺🇸 USA 2 | 17 | 3N | ♠6 | +3 | -1 |
| -0.4 | Round 17 | 🇺🇸 USA 2 | 11 | 3♦ | ♥4 | -2 | +0 |
| -0.4 | Round 20 | 🇺🇸 USA 1 | 18 | 3♥ | ♦2 | -1 | +0 |
| -0.7 | Round 1 | 🇳🇱 NETHERLANDS | 10 | 3N | ♥Q | +2 | -1 |
| -0.8 | Round 13 | 🇿🇦 SOUTH AFRICA | 3 | 2♣x | ♠J | -3 | -4 |
| -0.9 | Round 5 | 🇦🇷 ARGENTINA | 15 | 2♠ | ♥K | +1 | +0 |
| -1.0 | Round 7 | 🇷🇺 RUSSIA | 7 | 3N | ♣8 | = | +0 |
| -1.0 | Round 10 | 🇸🇪 SWEDEN | 12 | 1N | ♥4 | +1 | +1 |
| -1.1 | Round 7 | 🇷🇺 RUSSIA | 12 | 3N | ♦7 | -1 | -5 |
| -1.3 | Round 10 | 🇸🇪 SWEDEN | 16 | 3N | ♦8 | +1 | -1 |
| -1.4 | Round 7 | 🇷🇺 RUSSIA | 8 | 5♦ | ♠A | +1 | +3 |
| -1.4 | Round 7 | 🇷🇺 RUSSIA | 16 | 4♠ | ♣7 | +1 | -1 |
| -1.6 | Round 7 | 🇷🇺 RUSSIA | 19 | 4♠ | ♥7 | +3 | +10 |
| -1.8 | Round 13 | 🇿🇦 SOUTH AFRICA | 13 | 3N | ♥3 | = | -2 |
| -1.8 | Round 17 | 🇺🇸 USA 2 | 2 | 3N | ♦7 | -1 | -5 |
| -2.0 | Round 10 | 🇸🇪 SWEDEN | 19 | 2♦ | ♥Q | = | -8 |
| -2.0 | Round 20 | 🇺🇸 USA 1 | 2 | 3♦ | ♠8 | -1 | -5 |
| -2.1 | Round 1 | 🇳🇱 NETHERLANDS | 13 | 3♣ | ♣5 | = | +1 |
| -2.3 | Round 13 | 🇿🇦 SOUTH AFRICA | 14 | 3N | ♦Q | = | +1 |
| -2.5 | Round 5 | 🇦🇷 ARGENTINA | 18 | 4♠ | ♦4 | -2 | -8 |
| -2.6 | Round 10 | 🇸🇪 SWEDEN | 17 | 4♠x | ♥3 | -1 | -8 |
| -2.6 | Round 10 | 🇸🇪 SWEDEN | 20 | 2♥ | ♦A | +1 | +0 |
| -2.6 | Round 17 | 🇺🇸 USA 2 | 18 | 4♠ | ♣K | -1 | +2 |
| -2.8 | Round 1 | 🇳🇱 NETHERLANDS | 11 | 7♠ | ♦K | = | +0 |
| -2.8 | Round 10 | 🇸🇪 SWEDEN | 1 | 2♠ | ♣5 | = | -5 |
| -3.0 | Round 17 | 🇺🇸 USA 2 | 9 | 1N | ♠K | +1 | +1 |
| -3.0 | Round 20 | 🇺🇸 USA 1 | 5 | 3N | ♦6 | +3 | -1 |
| -3.1 | Round 17 | 🇺🇸 USA 2 | 5 | 3N | ♠3 | +2 | +0 |
| -3.2 | Round 17 | 🇺🇸 USA 2 | 10 | 4♥ | ♦K | -1 | -12 |
| -3.3 | Round 7 | 🇷🇺 RUSSIA | 11 | 3♣ | ♣7 | -1 | -4 |
| -3.5 | Round 7 | 🇷🇺 RUSSIA | 14 | 2N | ♦9 | -1 | -5 |
| -3.8 | Round 13 | 🇿🇦 SOUTH AFRICA | 18 | 2♥ | ♣J | +2 | -7 |
| -3.9 | Round 5 | 🇦🇷 ARGENTINA | 12 | 7♥x | ♣A | -4 | -16 |
| -4.0 | Round 13 | 🇿🇦 SOUTH AFRICA | 15 | 1N | ♠10 | +1 | -11 |
| -4.0 | Round 13 | 🇿🇦 SOUTH AFRICA | 17 | 2♥ | ♠6 | +1 | -1 |
| -4.0 | Round 17 | 🇺🇸 USA 2 | 13 | 6♥ | ♥9 | = | +0 |
| -4.0 | Round 20 | 🇺🇸 USA 1 | 13 | 3N | ♦4 | = | +1 |
| -4.3 | Round 1 | 🇳🇱 NETHERLANDS | 16 | 2♠ | ♥9 | -1 | -5 |
| -4.3 | Round 17 | 🇺🇸 USA 2 | 19 | 4♥ | ♦9 | -1 | -6 |
| -4.4 | Round 5 | 🇦🇷 ARGENTINA | 10 | 5♣ | ♠10 | -1 | -6 |
| -4.6 | Round 10 | 🇸🇪 SWEDEN | 6 | 5♠x | ♥K | -4 | -7 |
| -4.9 | Round 5 | 🇦🇷 ARGENTINA | 4 | 2♥ | ♠K | -3 | -5 |
| -4.9 | Round 7 | 🇷🇺 RUSSIA | 13 | 2♥x | ♠K | -1 | -7 |
| -5.0 | Round 5 | 🇦🇷 ARGENTINA | 13 | 4♠x | ♥A | = | -5 |
| -5.1 | Round 10 | 🇸🇪 SWEDEN | 14 | 4♥ | ♦10 | = | -3 |
| -5.2 | Round 13 | 🇿🇦 SOUTH AFRICA | 11 | 4♣ | ♦Q | = | -8 |
| -5.4 | Round 5 | 🇦🇷 ARGENTINA | 14 | 3♥ | ♠4 | +1 | -6 |
| -5.4 | Round 5 | 🇦🇷 ARGENTINA | 17 | 4♠ | ♦A | = | -3 |
| -5.8 | Round 1 | 🇳🇱 NETHERLANDS | 20 | 6N | ♦2 | -3 | -14 |
| -6.2 | Round 20 | 🇺🇸 USA 1 | 17 | 6♠ | ♥3 | = | +0 |
| -6.5 | Round 10 | 🇸🇪 SWEDEN | 10 | 4♠ | ♠4 | +2 | -13 |
| -6.5 | Round 13 | 🇿🇦 SOUTH AFRICA | 10 | 3♠ | ♠7 | +3 | -9 |
| -6.7 | Round 13 | 🇿🇦 SOUTH AFRICA | 6 | 5♥ | ♣A | -2 | -7 |
| -6.8 | Round 10 | 🇸🇪 SWEDEN | 8 | 3N | ♥K | = | -7 |
| -7.0 | Round 13 | 🇿🇦 SOUTH AFRICA | 19 | 4♥x | ♠7 | = | -9 |
| -7.8 | Round 10 | 🇸🇪 SWEDEN | 2 | 3♠ | ♦10 | +1 | -10 |
| -9.1 | Round 10 | 🇸🇪 SWEDEN | 5 | 3N | ♠6 | -2 | -8 |
| -9.4 | Round 17 | 🇺🇸 USA 2 | 14 | 3♦ | ♠3 | +3 | -13 |
| -10.0 | Round 1 | 🇳🇱 NETHERLANDS | 4 | 3N | ♠Q | +1 | +0 |
| -10.0 | Round 13 | 🇿🇦 SOUTH AFRICA | 4 | 4♠ | ♦4 | +1 | -11 |
| -10.5 | Round 7 | 🇷🇺 RUSSIA | 3 | 4♠ | ♠3 | -1 | -12 |
| -10.9 | Round 20 | 🇺🇸 USA 1 | 7 | 5♦ | ♥J | -2 | -13 |
| -14.5 | Round 13 | 🇿🇦 SOUTH AFRICA | 5 | 6♣ | ♠7 | = | -13 |