🇹🇼 CHENG Yung-Yun · CHINESE TAIPEI
109rank
-78.3Butler · 88 bds
-0.89per board
±5.0swing
-0.16vs par /bd · #54/111
-0.85adjusted /bd
by round
vs par split: bidding +0.00 · play -0.16
Strength of schedule: opponents averaged +0.04/bd (an average draw) → opponent-adjusted -0.85/bd
Card play — on target: opening leads 78.3% #68 of 111 · declarer play 57.1% #109 of 111 · defence 88.2% #30 of 111
Bidding activity — not a pass: 45.9% #33 of 111 (112/244)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 75.0% (8) | 80.0% (15) |
| Declarer play | 100.0% (2) | 50.0% (12) |
| Defence | 73.3% (15) | 94.4% (36) |
Opening leads by suit led: ♠ 75.0% (8) · ♥ 71.4% (7) · ♦ 80.0% (5) · ♣ 100.0% (3)
vs par by strain: NT +1.52 (25) · a suit -0.82 (63)
vs par by level: part-score +0.72 (25) · game +0.09 (56) · slam -5.29 (7)
By role: declaring -2.00/bd (-3.51 vs par · 37) · defending -0.08/bd (+2.27 vs par · 51)
By vulnerability: vulnerable -2.06/bd (-1.59 vs par · 44) · not vulnerable +0.28/bd (+1.27 vs par · 44)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 2 | C.Chiang | H.Koh – J.Ong | Open | 8 | -4.6 | -0.57 | -1.75 |
| Round 3 | C.Chiang | Z.Zhu – Y.Zuo | Open | 8 | -2.6 | -0.33 | +0.62 |
| Round 5 | C.Chiang | M.Iher – S.Laan | Open | 8 | -20.5 | -2.56 | -2.75 |
| Round 6 | C.Chiang | B.Van Noort – A.Boonstra | Closed | 8 | +5.5 | +0.69 | +1.12 |
| Round 8 | C.Chiang | C.Li – X.Liu | Closed | 8 | -19.8 | -2.48 | -4.75 |
| Round 9 | C.Chiang | S.Kar – S.Bar | Closed | 8 | +0.4 | +0.05 | +2.50 |
| Round 11 | C.Chiang | M.Satriawan – S.Wijayanto | Open | 8 | -0.1 | -0.01 | +1.12 |
| Round 12 | C.Chiang | S.Scata – A.Manganella | Open | 8 | -12.3 | -1.54 | -0.75 |
| Round 13 | C.Chiang | J.Lieberman – C.Welland | Closed | 8 | +1.2 | +0.15 | +2.50 |
| Round 15 | C.Chiang | S.Pepic – M.Simic | Closed | 8 | -0.6 | -0.07 | +3.12 |
| Round 16 | C.Chiang | R.Kreitals – D.Jansons | Open | 8 | -24.9 | -3.11 | -2.75 |
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 |
|---|---|---|---|---|---|---|---|
| +10.2 | Round 12 | 🇮🇹 ITALY | 31 | 6♠ | ♦3 | = | +0 |
| +9.3 | Round 11 | 🇮🇩 INDONESIA | 24 | 4♥ | ♠K | +1 | +1 |
| +8.6 | Round 6 | 🇳🇱 NETHERLANDS | 9 | 5♦x | ♠A | -2 | +5 |
| +8.6 | Round 15 | 🇷🇸 SERBIA | 24 | 4♥ | ♣K | -1 | +10 |
| +8.2 | Round 11 | 🇮🇩 INDONESIA | 21 | 3NT | ♠Q | = | +7 |
| +7.8 | Round 13 | 🇺🇸 USA2 | 7 | 4NT | ♣7 | +2 | +13 |
| +7.7 | Round 8 | 🇨🇳 CHINA | 26 | 3NT | ♣5 | -3 | +5 |
| +7.7 | Round 15 | 🇷🇸 SERBIA | 17 | 3NT | ♥2 | -2 | +11 |
| +6.6 | Round 9 | 🇮🇳 INDIA | 2 | 3NT | ♠2 | = | +7 |
| +6.3 | Round 3 | 🇩🇪 GERMANY | 17 | 4♥ | ♠K | = | +7 |
| +6.0 | Round 6 | 🇳🇱 NETHERLANDS | 16 | 4♥x | ♠Q | -2 | +5 |
| +5.5 | Round 6 | 🇳🇱 NETHERLANDS | 11 | 1NTx | ♥J | -2 | +5 |
| +4.8 | Round 2 | 🇸🇬 SINGAPORE | 11 | 3♦ | ♣Q | -1 | +10 |
| +3.9 | Round 6 | 🇳🇱 NETHERLANDS | 15 | 4♠ | ♥2 | = | +0 |
| +3.4 | Round 16 | 🇱🇻 LATVIA | 29 | 5♣ | ♦K | -1 | +6 |
| +3.1 | Round 9 | 🇮🇳 INDIA | 8 | 5♠x | ♥K | -1 | +6 |
| +2.7 | Round 9 | 🇮🇳 INDIA | 4 | 4♥ | ♦Q | -2 | +8 |
| +2.5 | Round 2 | 🇸🇬 SINGAPORE | 14 | 5♥x | ♠K | -2 | +5 |
| +2.5 | Round 3 | 🇩🇪 GERMANY | 24 | 4♠ | ♥2 | -2 | +6 |
| +2.5 | Round 12 | 🇮🇹 ITALY | 30 | 3♠ | ♥A | = | +7 |
| +2.4 | Round 11 | 🇮🇩 INDONESIA | 18 | 6♦ | ♥K | -1 | +12 |
| +1.9 | Round 2 | 🇸🇬 SINGAPORE | 16 | 1NT | ♥K | = | -1 |
| +1.7 | Round 13 | 🇺🇸 USA2 | 6 | 5♦x | ♠K | -1 | +5 |
| +1.4 | Round 2 | 🇸🇬 SINGAPORE | 10 | 2♦ | ♣K | -1 | +0 |
| +1.3 | Round 9 | 🇮🇳 INDIA | 1 | 4♠ | ♥4 | -1 | +10 |
| +1.1 | Round 8 | 🇨🇳 CHINA | 29 | 4♠ | ♦3 | = | -1 |
| +0.9 | Round 16 | 🇱🇻 LATVIA | 28 | 4♠ | ♣Q | = | +6 |
| +0.7 | Round 15 | 🇷🇸 SERBIA | 20 | 2NT | ♦Q | -3 | +7 |
| +0.6 | Round 3 | 🇩🇪 GERMANY | 19 | 1NT | ♠J | -2 | +0 |
| +0.6 | Round 15 | 🇷🇸 SERBIA | 21 | 4♥ | ♦3 | = | +0 |
| +0.1 | Round 5 | 🇪🇪 ESTONIA | 3 | 4♠ | ♦3 | = | +0 |
| +0.1 | Round 6 | 🇳🇱 NETHERLANDS | 12 | 1NT | ♥5 | +1 | +5 |
| -0.0 | Round 8 | 🇨🇳 CHINA | 30 | 4♠ | ♣A | +1 | +0 |
| -0.1 | Round 3 | 🇩🇪 GERMANY | 20 | 3NT | ♦5 | +1 | -1 |
| -0.1 | Round 12 | 🇮🇹 ITALY | 32 | 3NT | ♠4 | +2 | +0 |
| -0.3 | Round 9 | 🇮🇳 INDIA | 3 | 3NT | ♦Q | -1 | +5 |
| -0.3 | Round 12 | 🇮🇹 ITALY | 25 | 2♠ | ♥T | +1 | +7 |
| -0.3 | Round 13 | 🇺🇸 USA2 | 8 | 3NT | ♠3 | +1 | -1 |
| -0.5 | Round 3 | 🇩🇪 GERMANY | 22 | 3NT | ♥T | = | +0 |
| -0.5 | Round 13 | 🇺🇸 USA2 | 3 | 1NT | ♠T | +1 | -6 |
| -0.7 | Round 5 | 🇪🇪 ESTONIA | 7 | 4♠ | ♥3 | = | +0 |
| -0.7 | Round 6 | 🇳🇱 NETHERLANDS | 14 | 6♦ | ♠9 | = | +2 |
| -1.1 | Round 11 | 🇮🇩 INDONESIA | 20 | 1NT | ♥6 | = | -1 |
| -1.1 | Round 15 | 🇷🇸 SERBIA | 19 | 4♠ | ♥A | +1 | +0 |
| -1.2 | Round 3 | 🇩🇪 GERMANY | 21 | 1NT | ♦7 | +2 | -1 |
| -1.2 | Round 11 | 🇮🇩 INDONESIA | 19 | 3NT | ♥8 | = | +0 |
| -1.3 | Round 5 | 🇪🇪 ESTONIA | 2 | 5♣x | ♥J | -1 | -6 |
| -1.3 | Round 13 | 🇺🇸 USA2 | 1 | 3NT | ♦K | +2 | +11 |
| -1.4 | Round 3 | 🇩🇪 GERMANY | 18 | 5♦ | ♠K | -1 | +2 |
| -1.4 | Round 5 | 🇪🇪 ESTONIA | 4 | 4♦ | ♣A | = | +0 |
| -1.6 | Round 2 | 🇸🇬 SINGAPORE | 15 | 4♠ | ♥7 | -1 | -10 |
| -1.6 | Round 16 | 🇱🇻 LATVIA | 30 | 4♠ | ♥6 | = | +1 |
| -1.7 | Round 13 | 🇺🇸 USA2 | 2 | 2♥ | ♠A | -1 | +2 |
| -1.8 | Round 5 | 🇪🇪 ESTONIA | 5 | 3♥ | ♠7 | +1 | +4 |
| -1.9 | Round 5 | 🇪🇪 ESTONIA | 8 | 2♥ | ♠K | = | +0 |
| -2.1 | Round 11 | 🇮🇩 INDONESIA | 17 | 2♠ | ♣9 | +1 | +0 |
| -2.2 | Round 8 | 🇨🇳 CHINA | 32 | 4♥ | ♠A | +1 | -10 |
| -2.2 | Round 12 | 🇮🇹 ITALY | 29 | 3♦ | ♦J | -2 | -3 |
| -2.2 | Round 13 | 🇺🇸 USA2 | 5 | 4♥ | ♠T | -3 | -2 |
| -2.2 | Round 16 | 🇱🇻 LATVIA | 27 | 4♥ | ♦J | = | +1 |
| -2.3 | Round 13 | 🇺🇸 USA2 | 4 | 1NT | ♥3 | +3 | -2 |
| -2.3 | Round 15 | 🇷🇸 SERBIA | 18 | 2♠ | ♠3 | +1 | +0 |
| -2.7 | Round 15 | 🇷🇸 SERBIA | 23 | 3♦ | ♠A | +2 | +10 |
| -2.7 | Round 16 | 🇱🇻 LATVIA | 32 | 3NT | ♥Q | -1 | -6 |
| -2.8 | Round 9 | 🇮🇳 INDIA | 5 | 3NT | ♦3 | -2 | -6 |
| -3.1 | Round 5 | 🇪🇪 ESTONIA | 1 | 4♠ | ♥2 | -3 | -6 |
| -3.5 | Round 2 | 🇸🇬 SINGAPORE | 12 | 4♥ | ♠K | -2 | -6 |
| -3.8 | Round 9 | 🇮🇳 INDIA | 7 | 3♠ | ♦6 | -1 | +0 |
| -4.2 | Round 6 | 🇳🇱 NETHERLANDS | 10 | 5♣ | ♥K | = | +0 |
| -4.3 | Round 2 | 🇸🇬 SINGAPORE | 9 | 4♠x | ♣5 | = | -5 |
| -5.4 | Round 8 | 🇨🇳 CHINA | 25 | 2♥ | ♠2 | +2 | -8 |
| -5.8 | Round 2 | 🇸🇬 SINGAPORE | 13 | 3♥ | ♣A | = | -7 |
| -6.0 | Round 12 | 🇮🇹 ITALY | 27 | 4♠ | ♠7 | +1 | -1 |
| -6.2 | Round 11 | 🇮🇩 INDONESIA | 23 | 3NT | ♥7 | = | +1 |
| -6.4 | Round 9 | 🇮🇳 INDIA | 6 | 4♠ | ♥T | -3 | -10 |
| -6.7 | Round 8 | 🇨🇳 CHINA | 27 | 4♠ | ♣2 | = | +0 |
| -6.9 | Round 8 | 🇨🇳 CHINA | 31 | 4♠ | ♦6 | -1 | -10 |
| -7.3 | Round 12 | 🇮🇹 ITALY | 28 | 4♠ | ♦6 | -2 | -6 |
| -7.4 | Round 8 | 🇨🇳 CHINA | 28 | 6♠ | ♥5 | -2 | -14 |
| -7.4 | Round 16 | 🇱🇻 LATVIA | 31 | 4♠ | ♦J | = | -13 |
| -7.6 | Round 16 | 🇱🇻 LATVIA | 25 | 5♦ | ♠J | -2 | -8 |
| -7.7 | Round 16 | 🇱🇻 LATVIA | 26 | 4♥ | ♦K | -3 | -9 |
| -8.8 | Round 3 | 🇩🇪 GERMANY | 23 | 4♥x | ♣Q | +1 | -8 |
| -9.1 | Round 12 | 🇮🇹 ITALY | 26 | 3♠ | ♣K | +1 | -10 |
| -9.4 | Round 11 | 🇮🇩 INDONESIA | 22 | 6♠ | ♦2 | = | -11 |
| -10.4 | Round 5 | 🇪🇪 ESTONIA | 6 | 3NT | ♥T | -3 | -14 |
| -12.1 | Round 15 | 🇷🇸 SERBIA | 22 | 6♦ | ♥5 | -1 | -13 |
| -13.7 | Round 6 | 🇳🇱 NETHERLANDS | 13 | 6♥ | ♦2 | -2 | -13 |