CHEN Dawei · YEH BROS
223rank
-5.2Butler · 130 bds
-0.04per board
±4.2swing
+0.30vs par /bd · #104/384
+0.07adjusted /bd
by round
vs par split: bidding +0.79 · play -0.47
Strength of schedule: opponents averaged +0.11/bd (a tough draw) → opponent-adjusted +0.07/bd
Card play — on target: opening leads 89.2% #26 of 384 · declarer play 76.9% #117 of 384 · defence 82.6% #204 of 384
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 85.7% (14) | 91.3% (23) |
| Declarer play | 84.2% (19) | 70.0% (20) |
| Defence | 76.9% (26) | 86.0% (43) |
Opening leads by suit led: ♠ 92.3% (13) · ♥ 76.9% (13) · ♦ 100.0% (6) · ♣ 100.0% (5)
vs par by strain: NT -0.54 (50) · a suit +0.87 (79)
vs par by level: part-score -1.06 (49) · game +0.87 (75) · slam +5.80 (5)
By role: declaring -0.48/bd (-2.44 vs par · 61) · defending +0.35/bd (+2.73 vs par · 69)
By vulnerability: vulnerable +0.13/bd (+0.86 vs par · 65) · not vulnerable -0.21/bd (-0.26 vs par · 65)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 2 | K.Shimamura | T.Nunn – M.Bourke | Open | 10 | +8.0 | +0.80 | +2.30 |
| Round 3 | K.Shimamura | S.Allen – J.Thompson | Closed | 10 | -3.3 | -0.33 | -0.90 |
| Round 4 | K.Shimamura | J.Slemr – P.Hoderova | Open | 10 | +4.5 | +0.45 | +1.50 |
| Round 5 | K.Shimamura | J.Voldoire – D.Avon | Open | 10 | -6.0 | -0.60 | -1.10 |
| Round 6 | K.Shimamura | M.Wilkinson – C.Ginsberg | Closed | 10 | +4.7 | +0.47 | +2.70 |
| Round 7 | K.Shimamura | N.Lhuissier – S.Rolland | Closed | 10 | -13.5 | -1.35 | -0.50 |
| Round 8 | K.Shimamura | J.Xerri – B.Xerri | Closed | 10 | +4.7 | +0.47 | -0.20 |
| Round 9 | K.Shimamura | P.Saporta – R.Saporta-Tworzydlo | Open | 10 | -3.3 | -0.33 | +0.00 |
| Round 10 | K.Shimamura | J.Romanowski – M.Rossard | Closed | 10 | -8.2 | -0.82 | -1.60 |
| Round 12 | K.Shimamura | G.Barrett – K.Barrett | Open | 10 | -2.3 | -0.23 | -1.30 |
| Round 13 | K.Shimamura | Z.Zahariev – N.Sayer | Open | 10 | +23.6 | +2.36 | +2.20 |
| Round 14 | K.Shimamura | J.Pszczola – M.Wortel | Closed | 10 | -2.0 | -0.20 | +1.20 |
| Round 15 | K.Shimamura | K.Rubins – M.Romanovska | Open | 10 | -12.1 | -1.21 | -0.40 |
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 |
|---|---|---|---|---|---|---|---|
| +11.6 | Round 4 | CZECHOSLOVAKIA | 2 | 6♥ | ♣3 | -1 | +17 |
| +9.9 | Round 3 | TICOS Y TRINI | 21 | 5♥x | ♠3 | = | +11 |
| +9.4 | Round 4 | CZECHOSLOVAKIA | 5 | 4♠x | ♥Q | -2 | +12 |
| +8.9 | Round 6 | SYDNEY | 29 | 4♥ | ♦8 | +1 | +10 |
| +8.4 | Round 12 | BARRETT | 24 | 3NT | ♥6 | = | +6 |
| +8.3 | Round 2 | REYNOLDS | 19 | 5♣ | ♥5 | -1 | +13 |
| +8.3 | Round 6 | SYDNEY | 25 | 7♦x | ♥A | -1 | +12 |
| +7.7 | Round 8 | BERNARD | 12 | 4♠x | ♦K | -3 | -3 |
| +7.1 | Round 2 | REYNOLDS | 12 | 4♥ | ♠J | = | +0 |
| +6.7 | Round 13 | KARSIYAKA | 3 | 3NT | ♥6 | +1 | +0 |
| +6.2 | Round 2 | REYNOLDS | 15 | 4♠ | ♥2 | +3 | +14 |
| +5.5 | Round 2 | REYNOLDS | 14 | 3NT | ♦A | = | +7 |
| +5.5 | Round 9 | BRIDGE MAGIQUE | 28 | 3NT | ♦A | -4 | +3 |
| +5.4 | Round 3 | TICOS Y TRINI | 27 | 5♦x | ♥Q | -3 | +2 |
| +5.0 | Round 13 | KARSIYAKA | 2 | 3NT | ♥5 | +1 | +0 |
| +4.9 | Round 8 | BERNARD | 17 | 5♦ | ♥K | -1 | +8 |
| +4.8 | Round 13 | KARSIYAKA | 4 | 5NT | ♠6 | -2 | +13 |
| +4.7 | Round 7 | GRANDEBARBE | 10 | 4♠ | ♥A | +2 | +13 |
| +4.4 | Round 4 | CZECHOSLOVAKIA | 6 | 2NT | ♠K | -2 | +7 |
| +4.2 | Round 10 | ROSSARD | 8 | 3♦ | ♠5 | -1 | +9 |
| +4.1 | Round 7 | GRANDEBARBE | 4 | 4♥x | ♠K | -1 | +2 |
| +3.8 | Round 5 | OURSEL | 19 | 5♣ | ♦K | -1 | +12 |
| +3.5 | Round 15 | LATVIA | 23 | 2♥ | ♥4 | +1 | +0 |
| +3.4 | Round 4 | CZECHOSLOVAKIA | 7 | 4♥ | ♠A | -1 | +6 |
| +3.3 | Round 7 | GRANDEBARBE | 3 | 3♠ | ♣2 | -2 | +2 |
| +3.3 | Round 14 | MILNER | 13 | 2♠ | ♦A | +3 | -2 |
| +3.3 | Round 15 | LATVIA | 29 | 4♥ | ♠7 | -1 | +6 |
| +2.5 | Round 13 | KARSIYAKA | 9 | 3NT | ♠Q | -1 | +6 |
| +2.4 | Round 6 | SYDNEY | 23 | 2♠ | ♦4 | = | +6 |
| +2.3 | Round 8 | BERNARD | 16 | 4♠ | ♦5 | +2 | +1 |
| +2.1 | Round 9 | BRIDGE MAGIQUE | 25 | 3♠ | ♣3 | = | +0 |
| +2.1 | Round 13 | KARSIYAKA | 7 | 3NT | ♠6 | -2 | +7 |
| +2.0 | Round 12 | BARRETT | 25 | 3NT | ♥5 | -2 | +7 |
| +1.8 | Round 6 | SYDNEY | 22 | 4♠x | ♥A | -2 | -7 |
| +1.8 | Round 13 | KARSIYAKA | 10 | 4♥ | ♠K | -1 | -1 |
| +1.6 | Round 8 | BERNARD | 18 | 2♥ | ♠J | -1 | +4 |
| +1.6 | Round 14 | MILNER | 15 | 5♦ | ♣2 | +1 | +11 |
| +1.5 | Round 14 | MILNER | 11 | 3♦ | ♠K | +1 | +0 |
| +1.4 | Round 10 | ROSSARD | 4 | 4♥ | ♣K | -2 | +8 |
| +1.3 | Round 7 | GRANDEBARBE | 1 | 3♥ | ♠K | = | +1 |
| +1.3 | Round 12 | BARRETT | 21 | 3NT | ♠6 | = | +0 |
| +1.3 | Round 13 | KARSIYAKA | 1 | 3♠ | ♣2 | = | +0 |
| +1.2 | Round 2 | REYNOLDS | 18 | 3NT | ♠6 | +3 | +14 |
| +1.2 | Round 5 | OURSEL | 14 | 2♠ | ♣Q | = | +7 |
| +1.0 | Round 5 | OURSEL | 18 | 1♠ | ♥2 | +2 | +0 |
| +1.0 | Round 10 | ROSSARD | 9 | 4♠ | ♥8 | +1 | +12 |
| +1.0 | Round 12 | BARRETT | 27 | 3♠ | ♥J | +2 | -6 |
| +0.9 | Round 14 | MILNER | 12 | 3NT | ♠5 | +3 | +1 |
| +0.9 | Round 14 | MILNER | 18 | 2♥ | ♥9 | -2 | -1 |
| +0.8 | Round 3 | TICOS Y TRINI | 25 | 4♠ | ♣Q | = | +0 |
| +0.8 | Round 8 | BERNARD | 15 | 3NT | ♠6 | +1 | +11 |
| +0.8 | Round 9 | BRIDGE MAGIQUE | 24 | 4♠ | ♣4 | +2 | +1 |
| +0.8 | Round 15 | LATVIA | 30 | 3NT | ♦J | = | -1 |
| +0.7 | Round 8 | BERNARD | 13 | 1NT | ♥K | +1 | +0 |
| +0.7 | Round 14 | MILNER | 19 | 3NT | ♣7 | +2 | +0 |
| +0.7 | Round 15 | LATVIA | 22 | 3♣ | ♠K | +1 | +0 |
| +0.6 | Round 5 | OURSEL | 11 | 2NT | ♥8 | -1 | -2 |
| +0.6 | Round 12 | BARRETT | 30 | 4♠ | ♥10 | +1 | +0 |
| +0.6 | Round 13 | KARSIYAKA | 8 | 3NT | ♦3 | +1 | +0 |
| +0.5 | Round 6 | SYDNEY | 24 | 4♥ | ♠3 | +1 | +0 |
| +0.4 | Round 9 | BRIDGE MAGIQUE | 21 | 4♠ | ♥J | = | -1 |
| +0.2 | Round 3 | TICOS Y TRINI | 24 | 1NT | ♦Q | = | +8 |
| +0.2 | Round 8 | BERNARD | 11 | 4♥ | ♠J | = | -1 |
| +0.1 | Round 5 | OURSEL | 17 | 4♠ | ♦6 | +1 | +0 |
| +0.0 | Round 2 | REYNOLDS | 13 | 2♣ | ♠2 | = | +1 |
| +0.0 | Round 14 | MILNER | 17 | 2♠ | ♥7 | +1 | -1 |
| -0.1 | Round 4 | CZECHOSLOVAKIA | 10 | 3♠ | ♣K | = | +0 |
| -0.1 | Round 9 | BRIDGE MAGIQUE | 23 | 2NT | ♣3 | -1 | +1 |
| -0.2 | Round 3 | TICOS Y TRINI | 23 | 3NT | ♣8 | +1 | +0 |
| -0.3 | Round 3 | TICOS Y TRINI | 30 | 4♠ | ♦10 | = | +3 |
| -0.3 | Round 13 | KARSIYAKA | 6 | Pass | -3 | ||
| -0.3 | Round 14 | MILNER | 16 | 3NT | ♠6 | = | +11 |
| -0.4 | Round 2 | REYNOLDS | 11 | 3♣ | ♠6 | = | +1 |
| -0.4 | Round 10 | ROSSARD | 2 | 3NT | ♠10 | +4 | -17 |
| -0.6 | Round 7 | GRANDEBARBE | 5 | 4♠ | ♣Q | = | +0 |
| -0.8 | Round 15 | LATVIA | 25 | 5♥ | ♠A | -1 | -3 |
| -0.9 | Round 13 | KARSIYAKA | 5 | 3♥ | ♦5 | = | +0 |
| -1.1 | Round 5 | OURSEL | 12 | 2♠ | ♦A | -2 | -1 |
| -1.2 | Round 7 | GRANDEBARBE | 7 | 2♥ | ♦5 | +2 | +10 |
| -1.2 | Round 10 | ROSSARD | 10 | 2♦ | ♣K | +2 | -10 |
| -1.3 | Round 7 | GRANDEBARBE | 6 | 1NT | ♥5 | -2 | -6 |
| -1.3 | Round 10 | ROSSARD | 7 | 3NT | ♣2 | +1 | -1 |
| -1.5 | Round 4 | CZECHOSLOVAKIA | 1 | 2♣ | ♠5 | -5 | +4 |
| -1.5 | Round 4 | CZECHOSLOVAKIA | 9 | 1NT | ♥9 | -1 | -4 |
| -1.6 | Round 3 | TICOS Y TRINI | 22 | 4♥ | ♣5 | -1 | -5 |
| -1.7 | Round 5 | OURSEL | 15 | 2NT | ♥K | = | +0 |
| -1.8 | Round 5 | OURSEL | 13 | 3NT | ♦9 | -1 | -12 |
| -1.8 | Round 6 | SYDNEY | 21 | 3NT | ♥7 | +1 | -1 |
| -1.8 | Round 9 | BRIDGE MAGIQUE | 26 | 4♠ | ♦Q | +2 | +13 |
| -1.8 | Round 12 | BARRETT | 26 | 1NT | ♠6 | = | +2 |
| -1.9 | Round 6 | SYDNEY | 27 | 3NT | ♠8 | -1 | -4 |
| -2.0 | Round 6 | SYDNEY | 26 | 6♥ | ♣K | = | +13 |
| -2.0 | Round 9 | BRIDGE MAGIQUE | 30 | 2♥ | ♠6 | +1 | +0 |
| -2.0 | Round 10 | ROSSARD | 6 | 4♠ | ♥9 | -2 | +0 |
| -2.1 | Round 9 | BRIDGE MAGIQUE | 29 | 3NT | ♠K | +2 | +0 |
| -2.3 | Round 5 | OURSEL | 16 | 3♠ | ♦7 | = | -7 |
| -2.5 | Round 10 | ROSSARD | 1 | 1NT | ♦6 | -2 | -5 |
| -2.5 | Round 15 | LATVIA | 27 | 3NT | ♠3 | +3 | +7 |
| -2.6 | Round 9 | BRIDGE MAGIQUE | 27 | 3NT | ♥8 | = | -7 |
| -2.8 | Round 12 | BARRETT | 22 | 3♠ | ♥A | -1 | -3 |
| -3.2 | Round 15 | LATVIA | 24 | 3♠ | ♥9 | = | -1 |
| -3.3 | Round 10 | ROSSARD | 3 | 3♥ | ♠4 | -1 | -5 |
| -3.5 | Round 9 | BRIDGE MAGIQUE | 22 | 3NT | ♥3 | = | -10 |
| -3.5 | Round 12 | BARRETT | 23 | 3♥ | ♣6 | = | +0 |
| -3.7 | Round 12 | BARRETT | 28 | 2♥ | ♦2 | = | -6 |
| -3.7 | Round 14 | MILNER | 14 | 3NT | ♣A | -3 | -2 |
| -3.8 | Round 12 | BARRETT | 29 | 6♠ | ♥6 | +1 | -13 |
| -3.8 | Round 15 | LATVIA | 26 | 3NT | ♦8 | -1 | -6 |
| -3.9 | Round 6 | SYDNEY | 28 | 3♦ | ♠A | -2 | -2 |
| -4.1 | Round 2 | REYNOLDS | 17 | 3NT | ♦3 | -2 | -6 |
| -4.1 | Round 4 | CZECHOSLOVAKIA | 4 | 1NT | ♠5 | = | -5 |
| -4.1 | Round 8 | BERNARD | 14 | 3NT | ♦2 | -1 | -11 |
| -4.1 | Round 8 | BERNARD | 20 | 1NT | ♦2 | -1 | -6 |
| -4.1 | Round 10 | ROSSARD | 5 | 3♠ | ♠6 | -2 | -7 |
| -4.1 | Round 15 | LATVIA | 28 | 3NT | ♠J | = | +0 |
| -5.0 | Round 2 | REYNOLDS | 16 | 4♠ | ♣2 | -1 | -10 |
| -5.3 | Round 3 | TICOS Y TRINI | 26 | 3♥ | ♠2 | +2 | -10 |
| -5.3 | Round 8 | BERNARD | 19 | 4♠ | ♦5 | -1 | -5 |
| -5.8 | Round 5 | OURSEL | 20 | 3NT | ♣6 | -2 | -8 |
| -5.8 | Round 7 | GRANDEBARBE | 2 | 3NT | ♥7 | +1 | +0 |
| -6.0 | Round 15 | LATVIA | 21 | 3NT | ♥3 | = | -6 |
| -6.1 | Round 3 | TICOS Y TRINI | 28 | 4♠ | ♠2 | -1 | -9 |
| -6.1 | Round 3 | TICOS Y TRINI | 29 | 3♠ | ♥2 | -1 | -9 |
| -6.8 | Round 4 | CZECHOSLOVAKIA | 8 | 4♠ | ♥8 | -2 | -11 |
| -6.9 | Round 14 | MILNER | 20 | 2NTx | ♠6 | -3 | -5 |
| -7.6 | Round 6 | SYDNEY | 30 | 7NT | ♠3 | = | +0 |
| -8.1 | Round 7 | GRANDEBARBE | 8 | 4♠ | ♥A | -1 | -14 |
| -9.9 | Round 7 | GRANDEBARBE | 9 | 3NT | ♠K | +1 | -13 |
| -10.3 | Round 4 | CZECHOSLOVAKIA | 3 | 4♥ | ♦K | -1 | -11 |
| -10.8 | Round 2 | REYNOLDS | 20 | 2♣xx | ♥6 | +1 | -11 |