BERKOWITZ David · TAYLOR
vs par split: bidding +0.00 · play -0.66
Strength of schedule: opponents averaged -0.08/bd (an easy draw) → opponent-adjusted -0.03/bd
Card play — on target: opening leads 77.8% #81 of 187 · declarer play 86.4% #32 of 187 · defence 90.5% #50 of 187
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 66.7% (3) | 83.3% (6) |
| Declarer play | 100.0% (5) | 82.4% (17) |
| Defence | 87.5% (8) | 92.3% (13) |
Opening leads by suit led: ♠ 100.0% (4) · ♥ 50.0% (2) · ♦ 50.0% (2) · ♣ 100.0% (1)
vs par by strain: NT +2.47 (17) · a suit -2.03 (39)
vs par by level: part-score -2.71 (17) · game +0.68 (38) · slam -17.00 (1)
By role: declaring -0.23/bd (-1.94 vs par · 35) · defending +0.51/bd (+1.48 vs par · 21)
By vulnerability: vulnerable +0.07/bd (-1.07 vs par · 29) · not vulnerable +0.02/bd (-0.22 vs par · 27)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | L.Berkowitz | V.Kovachev – D.Marquardt | Closed | 7 | +1.3 | +0.19 | -1.00 |
| Round 2 | L.Berkowitz | Y.Chen – X.Zhang | Closed | 7 | -0.8 | -0.11 | +1.43 |
| Round 3 | L.Berkowitz | R.Van Prooijen – A.Wilson | Open | 7 | -1.9 | -0.27 | -3.29 |
| Round 4 | L.Berkowitz | J.Li – L.Shen | Closed | 7 | +14.9 | +2.13 | +0.86 |
| Round 5 | L.Berkowitz | J.Wang – J.Liu | Closed | 7 | -5.7 | -0.81 | -3.00 |
| Round 6 | L.Berkowitz | G.Hampson – J.Meyers | Closed | 7 | -5.9 | -0.84 | +1.00 |
| Round 7 | L.Berkowitz | L.Yang – H.Wang | Closed | 7 | -8.9 | -1.27 | -1.29 |
| Round 8 | L.Berkowitz | Q.Cheng – Y.Hou | Closed | 7 | +9.7 | +1.39 | +0.00 |
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 |
|---|---|---|---|---|---|---|---|
| +10.0 | Round 1 | VALIO | 1 | 4♥x | ♦A | -4 | +9 |
| +9.8 | Round 4 | SHENZHEN | 25 | 3NT | ♣7 | = | +10 |
| +6.9 | Round 8 | BARR | 28 | 1NT | ♣6 | -5 | +9 |
| +6.0 | Round 6 | DIAMOND | 8 | 3NT | ♠A | -4 | +8 |
| +5.4 | Round 1 | VALIO | 4 | 1NT | ♥2 | +2 | +7 |
| +4.8 | Round 8 | BARR | 25 | 4♥ | ♠2 | +1 | +0 |
| +4.7 | Round 4 | SHENZHEN | 26 | 5♣x | ♥A | = | -2 |
| +4.7 | Round 7 | GEELY AUTOMOBILE | 19 | 4♠ | ♥Q | -1 | +5 |
| +3.6 | Round 3 | WILLENKEN | 21 | 4♠ | ♣8 | -2 | +6 |
| +3.5 | Round 1 | VALIO | 5 | 1NT | ♠3 | -2 | +0 |
| +3.2 | Round 5 | CHIME | 1 | 4♠ | ♣A | = | +0 |
| +3.2 | Round 6 | DIAMOND | 9 | 3NT | ♥5 | = | +14 |
| +3.0 | Round 8 | BARR | 24 | 4♥ | ♠Q | = | +0 |
| +2.7 | Round 2 | LUCKY SEVEN | 8 | 4♠x | ♠A | -2 | +5 |
| +2.6 | Round 3 | WILLENKEN | 15 | 3♠ | ♦Q | = | +0 |
| +2.6 | Round 6 | DIAMOND | 13 | 5♥x | ♠7 | -1 | +0 |
| +2.4 | Round 4 | SHENZHEN | 24 | 1NT | ♣K | +1 | +1 |
| +2.4 | Round 7 | GEELY AUTOMOBILE | 18 | 4♠ | ♣Q | +1 | +0 |
| +2.0 | Round 2 | LUCKY SEVEN | 10 | 4♠ | ♣6 | +1 | +0 |
| +1.7 | Round 2 | LUCKY SEVEN | 13 | 3NT | ♦7 | +4 | +2 |
| +1.6 | Round 3 | WILLENKEN | 20 | 4♠ | ♦Q | +1 | +0 |
| +1.6 | Round 5 | CHIME | 4 | 4♠ | ♦5 | +1 | +0 |
| +1.5 | Round 8 | BARR | 22 | 4♥ | ♠10 | +1 | +0 |
| +1.4 | Round 2 | LUCKY SEVEN | 11 | 5♦x | ♥A | -2 | +4 |
| +1.3 | Round 3 | WILLENKEN | 19 | 3NT | ♣4 | +1 | +1 |
| +1.1 | Round 1 | VALIO | 6 | 4♥ | ♥7 | +1 | +0 |
| +0.7 | Round 4 | SHENZHEN | 28 | 1NT | ♥K | -1 | +1 |
| +0.4 | Round 2 | LUCKY SEVEN | 14 | 4♠ | ♣J | +2 | +14 |
| +0.4 | Round 5 | CHIME | 3 | 2♠ | ♠5 | +1 | +0 |
| +0.4 | Round 6 | DIAMOND | 14 | 4♥ | ♦10 | -1 | +3 |
| +0.1 | Round 5 | CHIME | 6 | 3♥ | ♦Q | +1 | -4 |
| +0.1 | Round 7 | GEELY AUTOMOBILE | 20 | 4♠ | ♦A | = | +1 |
| -0.6 | Round 4 | SHENZHEN | 22 | 4♠ | ♦A | +1 | +0 |
| -0.7 | Round 8 | BARR | 23 | 3NT | ♠10 | +1 | +1 |
| -0.8 | Round 8 | BARR | 27 | 4♠ | ♦7 | = | +0 |
| -0.9 | Round 4 | SHENZHEN | 27 | 3♥ | ♣K | -1 | -4 |
| -1.1 | Round 5 | CHIME | 5 | 1♠ | ♦4 | = | +0 |
| -1.2 | Round 4 | SHENZHEN | 23 | 3NT | ♠6 | = | +0 |
| -1.4 | Round 1 | VALIO | 2 | 3NT | ♠K | +2 | -1 |
| -1.4 | Round 5 | CHIME | 2 | 2NT | ♥2 | = | +0 |
| -1.4 | Round 7 | GEELY AUTOMOBILE | 17 | 4♠ | ♦10 | +1 | +0 |
| -2.8 | Round 7 | GEELY AUTOMOBILE | 21 | 4♠ | ♦2 | -1 | -5 |
| -2.9 | Round 3 | WILLENKEN | 18 | 3NT | ♣5 | -1 | -13 |
| -3.2 | Round 6 | DIAMOND | 11 | 3NT | ♠5 | = | +2 |
| -3.6 | Round 3 | WILLENKEN | 16 | 2♠ | ♦2 | = | -11 |
| -3.7 | Round 2 | LUCKY SEVEN | 12 | 3♥ | ♥6 | +2 | -6 |
| -4.0 | Round 7 | GEELY AUTOMOBILE | 15 | 3NT | ♣Q | = | +0 |
| -4.5 | Round 3 | WILLENKEN | 17 | 4♥ | ♦2 | -2 | -6 |
| -5.0 | Round 8 | BARR | 26 | 3♠ | ♥Q | +1 | -10 |
| -5.3 | Round 2 | LUCKY SEVEN | 9 | 2♥x | ♦7 | -2 | -9 |
| -5.9 | Round 6 | DIAMOND | 12 | 3♥ | ♦A | -1 | -10 |
| -7.9 | Round 7 | GEELY AUTOMOBILE | 16 | 4♠ | ♣8 | -1 | -10 |
| -8.5 | Round 5 | CHIME | 7 | 6♠ | ♣9 | -2 | -17 |
| -8.6 | Round 1 | VALIO | 3 | 5♦x | ♣4 | -3 | -12 |
| -8.7 | Round 1 | VALIO | 7 | 4♠ | ♥J | = | -10 |
| -9.0 | Round 6 | DIAMOND | 10 | 3♠ | ♦5 | +1 | -10 |