BERKOWITZ Dana · BERKSMA
vs par split: bidding -1.06 · play +0.82
Strength of schedule: opponents averaged +0.32/bd (a tough draw) → opponent-adjusted +1.01/bd
Card play — on target: opening leads 66.7% #485 of 527 · declarer play 87.5% #54 of 527 · defence 85.2% #275 of 527
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 100.0% (1) | 60.0% (5) |
| Declarer play | 100.0% (4) | 75.0% (4) |
| Defence | 83.3% (6) | 85.7% (21) |
Opening leads by suit led: ♠ 66.7% (3) · ♥ 0.0% (1) · ♦ 100.0% (2)
vs par by strain: NT -1.59 (17) · a suit +0.46 (33)
vs par by level: part-score -0.67 (21) · game -0.04 (24) · slam +0.60 (5)
By role: declaring +0.09/bd (-3.61 vs par · 23) · defending +1.22/bd (+2.63 vs par · 27)
By vulnerability: vulnerable +0.50/bd (-0.40 vs par · 25) · not vulnerable +0.89/bd (-0.08 vs par · 25)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | D.Berkowitz | B.Kutuk – O.Kizilok | Closed | 10 | -7.0 | -0.70 | -0.60 |
| Round 4 | D.Berkowitz | M.Wortel – J.Hop | Open | 10 | +7.5 | +0.75 | -1.50 |
| Round 5 | D.Berkowitz | T.Davis – B.Mcguire | Open | 10 | +24.7 | +2.47 | +3.60 |
| Round 8 | D.Berkowitz | C.Puillet – Q.Robert | Closed | 10 | +12.8 | +1.28 | -1.20 |
| Round 9 | D.Berkowitz | R.Ritmeijer – M.Ticha | Open | 10 | -3.1 | -0.31 | -1.50 |
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 8 | PUILLET | 20 | 4♥ | ♠4 | -2 | +13 |
| +10.8 | Round 4 | FERM | 7 | 6♥ | ♠8 | = | +1 |
| +10.7 | Round 5 | APACHE | 15 | 6♥ | ♣6 | -2 | +13 |
| +10.5 | Round 5 | APACHE | 17 | 2♠x | ♦3 | -4 | +9 |
| +6.1 | Round 8 | PUILLET | 13 | 4♠x | ♣5 | -1 | -7 |
| +5.8 | Round 5 | APACHE | 12 | 3NT | ♣4 | -4 | +11 |
| +3.8 | Round 1 | KIBE | 6 | 3NT | ♠2 | +1 | -12 |
| +3.8 | Round 1 | KIBE | 7 | 4♥ | ♦2 | -1 | +12 |
| +3.2 | Round 8 | PUILLET | 11 | 2♠ | ♦6 | = | +6 |
| +2.9 | Round 4 | FERM | 1 | 6♠ | ♥A | = | +0 |
| +2.6 | Round 5 | APACHE | 14 | 3♦ | ♦8 | +1 | +1 |
| +2.6 | Round 9 | WILSON | 29 | 3♦ | ♠2 | -1 | -1 |
| +2.5 | Round 4 | FERM | 3 | 4♥ | ♣2 | -2 | -9 |
| +2.0 | Round 1 | KIBE | 8 | 3♥ | ♣A | -1 | +3 |
| +1.9 | Round 8 | PUILLET | 15 | 3♣ | ♥2 | -1 | +0 |
| +1.7 | Round 4 | FERM | 2 | 3♥ | ♦A | -1 | +2 |
| +1.6 | Round 9 | WILSON | 24 | 3NT | ♥8 | -1 | +5 |
| +1.3 | Round 9 | WILSON | 25 | 1NT | ♣7 | -1 | -2 |
| +1.3 | Round 9 | WILSON | 28 | 3♥ | ♥3 | = | +0 |
| +1.2 | Round 9 | WILSON | 23 | 3NT | ♣3 | +2 | +0 |
| +1.1 | Round 8 | PUILLET | 12 | 3NT | ♣5 | +2 | +1 |
| +0.8 | Round 9 | WILSON | 26 | 2♦ | ♦8 | +1 | +0 |
| +0.5 | Round 4 | FERM | 5 | 3♥ | ♥3 | +1 | -6 |
| +0.5 | Round 4 | FERM | 6 | 2NT | ♦4 | +1 | +6 |
| +0.5 | Round 5 | APACHE | 13 | 3♥ | ♠2 | -1 | -1 |
| +0.3 | Round 4 | FERM | 4 | 2♠ | ♦Q | -2 | +2 |
| +0.3 | Round 5 | APACHE | 11 | 3NT | ♥4 | +2 | +0 |
| +0.2 | Round 1 | KIBE | 1 | 3NT | ♥9 | +1 | -1 |
| -0.1 | Round 1 | KIBE | 4 | 3♥ | ♣J | = | -11 |
| -0.4 | Round 1 | KIBE | 10 | 4♠ | ♦7 | +2 | +13 |
| -0.6 | Round 5 | APACHE | 19 | 3NT | ♦3 | +2 | +11 |
| -0.8 | Round 5 | APACHE | 16 | 1NT | ♦5 | -2 | -2 |
| -0.8 | Round 8 | PUILLET | 17 | 4♠ | ♥4 | +1 | +0 |
| -0.9 | Round 9 | WILSON | 22 | 4♠ | ♣K | = | +0 |
| -1.0 | Round 5 | APACHE | 20 | 4♠ | ♥A | +1 | -1 |
| -1.1 | Round 4 | FERM | 8 | 4♥ | ♣J | = | +0 |
| -1.1 | Round 8 | PUILLET | 18 | 4♠ | ♠5 | +1 | -11 |
| -1.2 | Round 8 | PUILLET | 14 | 3♥ | ♣5 | -1 | -2 |
| -1.6 | Round 1 | KIBE | 5 | 3♣ | ♦7 | +1 | +0 |
| -1.7 | Round 1 | KIBE | 9 | 3NT | ♠K | = | +1 |
| -2.2 | Round 8 | PUILLET | 16 | 3♣ | ♠A | -1 | -3 |
| -2.5 | Round 9 | WILSON | 30 | 4♥ | ♦A | +1 | +0 |
| -3.3 | Round 5 | APACHE | 18 | 3NT | ♣10 | -1 | -5 |
| -3.9 | Round 1 | KIBE | 2 | 3NT | ♠A | -2 | -11 |
| -4.1 | Round 4 | FERM | 10 | 4♠ | ♥A | = | +1 |
| -4.1 | Round 9 | WILSON | 27 | 6NT | ♥10 | +1 | -11 |
| -4.4 | Round 9 | WILSON | 21 | 2NT | ♣K | -3 | -6 |
| -6.2 | Round 8 | PUILLET | 19 | 4♦ | ♥8 | = | -9 |
| -6.5 | Round 4 | FERM | 9 | 3NT | ♦4 | -1 | -12 |
| -9.1 | Round 1 | KIBE | 3 | 6♥ | ♠5 | = | +0 |