ZACK EFRAIMSSON Anna · GOLDBERG
52rank
+42.9Butler · 112 bds
+0.38per board
±4.1swing
-0.13vs par /bd · #117/210
+0.60adjusted /bd
by round
vs par split: bidding -0.33 · play +0.20
Strength of schedule: opponents averaged +0.21/bd (a tough draw) → opponent-adjusted +0.60/bd
Card play — on target: opening leads 76.9% #148 of 210 · declarer play 70.0% #148 of 210 · defence 83.1% #110 of 210
Bidding activity — not a pass: 41.2% #137 of 210 (121/294)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 78.6% (14) | 75.0% (12) |
| Declarer play | 66.7% (9) | 71.4% (21) |
| Defence | 76.2% (21) | 86.8% (38) |
Opening leads by suit led: ♠ 75.0% (12) · ♥ 100.0% (7) · ♦ 75.0% (4) · ♣ 33.3% (3)
vs par by strain: NT +0.09 (35) · a suit -0.23 (77)
vs par by level: part-score -0.11 (47) · game +0.16 (62) · slam -6.67 (3)
By role: declaring -0.11/bd (-3.00 vs par · 53) · defending +0.82/bd (+2.44 vs par · 59)
By vulnerability: vulnerable -0.19/bd (-0.86 vs par · 56) · not vulnerable +0.95/bd (+0.59 vs par · 56)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | B.Efraimsson | M.Michielsen – C.Lorenzini | Open | 14 | +13.0 | +0.93 | +2.00 |
| Round 2 | B.Efraimsson | P.Marcinowski – J.Zmuda | Open | 14 | -8.0 | -0.57 | -0.14 |
| Round 3 | B.Efraimsson | P.Bahnik – E.Bahnikova | Open | 14 | +10.1 | +0.72 | +0.43 |
| Round 4 | B.Efraimsson | O.Herbst – A.Asulin | Open | 14 | -4.1 | -0.29 | -1.93 |
| Round 5 | B.Efraimsson | K.Marinovski – M.Pilipovic | Open | 14 | +30.0 | +2.14 | -0.21 |
| Round 6 | B.Efraimsson | A.Versace – C.Alpert | Open | 14 | +3.1 | +0.22 | -0.36 |
| Round 7 | B.Efraimsson | G.Hampson – W.Wang | Open | 14 | -4.2 | -0.30 | +0.86 |
| Round 8 | B.Efraimsson | J.Maricic – S.Ashe | Open | 14 | +3.0 | +0.21 | -1.71 |
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 |
|---|---|---|---|---|---|---|---|
| +11.9 | Round 8 | ASHE | 24 | 2♦x | ♠9 | -5 | +12 |
| +9.7 | Round 3 | BAHNICI | 8 | 5♠ | ♦6 | +2 | +14 |
| +9.2 | Round 6 | BERNAL | 20 | 3NT | ♠5 | -1 | +12 |
| +9.0 | Round 1 | DAISY CHAIN | 14 | 5♣ | ♦2 | -1 | +11 |
| +8.7 | Round 1 | DAISY CHAIN | 11 | 5♦x | ♣Q | = | +13 |
| +8.2 | Round 4 | LAKO | 22 | 6♠ | ♥7 | +1 | -13 |
| +7.9 | Round 5 | CROATIA | 4 | 4♠x | ♥A | -2 | -12 |
| +7.7 | Round 7 | ZHANG | 9 | 4♥ | ♠9 | -2 | +13 |
| +7.5 | Round 3 | BAHNICI | 14 | 3NT | ♠6 | -2 | +14 |
| +5.4 | Round 5 | CROATIA | 7 | 4♥ | ♠J | = | -13 |
| +5.0 | Round 2 | EMI | 19 | 2♠ | ♦A | +2 | +6 |
| +5.0 | Round 4 | LAKO | 21 | 2♠ | ♥9 | = | +12 |
| +4.9 | Round 3 | BAHNICI | 4 | 3NT | ♠4 | -1 | +12 |
| +4.7 | Round 5 | CROATIA | 13 | 3♦ | ♠A | +2 | +11 |
| +4.7 | Round 6 | BERNAL | 18 | 5♥ | ♠T | -1 | +5 |
| +4.1 | Round 4 | LAKO | 26 | 2♦ | ♥K | +1 | +6 |
| +3.7 | Round 1 | DAISY CHAIN | 6 | 3NT | ♥A | -5 | +3 |
| +3.7 | Round 2 | EMI | 27 | 3NT | ♦6 | +2 | +0 |
| +3.7 | Round 5 | CROATIA | 5 | 4♣ | ♥T | -3 | +2 |
| +3.6 | Round 1 | DAISY CHAIN | 12 | 3♥ | ♣Q | = | +0 |
| +3.6 | Round 5 | CROATIA | 8 | 4♥ | ♠3 | +2 | +11 |
| +3.4 | Round 1 | DAISY CHAIN | 2 | 3NT | ♠2 | = | -1 |
| +3.3 | Round 8 | ASHE | 18 | 3NT | ♠6 | -2 | +6 |
| +3.3 | Round 8 | ASHE | 19 | 3♦ | ♠3 | = | +6 |
| +3.2 | Round 5 | CROATIA | 1 | 3♦ | ♥5 | +1 | +0 |
| +3.2 | Round 6 | BERNAL | 16 | 3NT | ♣5 | +2 | +0 |
| +3.0 | Round 7 | ZHANG | 4 | 2♥ | ♦2 | +2 | +10 |
| +2.9 | Round 4 | LAKO | 28 | 3NT | ♥Q | -2 | +8 |
| +2.6 | Round 3 | BAHNICI | 6 | 3NT | ♠5 | +1 | +16 |
| +2.3 | Round 1 | DAISY CHAIN | 9 | 1NT | ♥4 | -3 | +1 |
| +2.3 | Round 6 | BERNAL | 21 | 1NT | ♦5 | +1 | +1 |
| +2.3 | Round 6 | BERNAL | 22 | 4♥ | ♣J | -1 | +5 |
| +2.3 | Round 6 | BERNAL | 28 | 1NT | ♠7 | +1 | +0 |
| +1.9 | Round 3 | BAHNICI | 12 | 3NT | ♦9 | +3 | -12 |
| +1.9 | Round 4 | LAKO | 24 | 3NT | ♠5 | = | -11 |
| +1.9 | Round 6 | BERNAL | 23 | 4♠ | ♣5 | +2 | +1 |
| +1.9 | Round 8 | ASHE | 17 | 5♥x | ♠A | -2 | +0 |
| +1.8 | Round 5 | CROATIA | 3 | 2♠ | ♥6 | = | -1 |
| +1.6 | Round 5 | CROATIA | 2 | 3♠ | ♦J | +1 | +6 |
| +1.6 | Round 6 | BERNAL | 19 | 2♠ | ♣3 | +1 | +1 |
| +1.5 | Round 1 | DAISY CHAIN | 4 | 4♠ | ♦5 | -1 | +6 |
| +1.5 | Round 7 | ZHANG | 1 | 3NT | ♥4 | +2 | +0 |
| +1.4 | Round 2 | EMI | 26 | 2♠ | ♣T | +2 | +10 |
| +1.4 | Round 7 | ZHANG | 8 | 2♦ | ♦2 | -2 | +0 |
| +1.2 | Round 2 | EMI | 20 | 3NT | ♠T | -2 | +2 |
| +1.2 | Round 5 | CROATIA | 14 | 4♥ | ♣T | +2 | +1 |
| +1.1 | Round 5 | CROATIA | 12 | 4♥ | ♠K | +1 | +0 |
| +1.0 | Round 3 | BAHNICI | 5 | 1♥ | ♣A | +2 | +0 |
| +1.0 | Round 8 | ASHE | 26 | 4♥ | ♦5 | = | +0 |
| +0.9 | Round 5 | CROATIA | 11 | 4♠ | ♥Q | = | -1 |
| +0.8 | Round 1 | DAISY CHAIN | 3 | 3♦ | ♣A | = | +7 |
| +0.7 | Round 3 | BAHNICI | 1 | 4♠ | ♣4 | = | +0 |
| +0.7 | Round 3 | BAHNICI | 7 | 2♠ | ♠2 | +1 | +0 |
| +0.6 | Round 4 | LAKO | 27 | 2♠ | ♦7 | +1 | -6 |
| +0.6 | Round 7 | ZHANG | 14 | 3♠ | ♦A | -1 | +4 |
| +0.3 | Round 4 | LAKO | 15 | 4♥ | ♠Q | +1 | +0 |
| +0.2 | Round 2 | EMI | 28 | 3♦ | ♠K | -1 | +10 |
| +0.2 | Round 7 | ZHANG | 3 | 4♠ | ♥Q | +1 | +0 |
| +0.2 | Round 7 | ZHANG | 6 | 1NT | ♥8 | +1 | +0 |
| -0.0 | Round 2 | EMI | 25 | 3NT | ♦2 | +1 | +1 |
| +0.0 | Round 3 | BAHNICI | 9 | 1NT | ♥2 | +2 | -6 |
| -0.1 | Round 4 | LAKO | 17 | 3♠ | ♦7 | = | +0 |
| -0.2 | Round 1 | DAISY CHAIN | 1 | 4♥ | ♠K | = | +0 |
| -0.2 | Round 2 | EMI | 15 | 5♦x | ♥6 | -1 | -6 |
| -0.2 | Round 7 | ZHANG | 11 | 2♠ | ♠9 | -1 | -3 |
| -0.3 | Round 3 | BAHNICI | 11 | 4♥ | ♦K | +1 | +0 |
| -0.3 | Round 3 | BAHNICI | 13 | 4♠ | ♥9 | +1 | +0 |
| -0.3 | Round 4 | LAKO | 25 | 3NT | ♠4 | +2 | +0 |
| -0.4 | Round 1 | DAISY CHAIN | 8 | 3NT | ♠5 | = | -1 |
| -0.7 | Round 2 | EMI | 24 | 3NT | ♥4 | +1 | +0 |
| -0.7 | Round 8 | ASHE | 15 | 4♥ | ♥9 | +1 | -1 |
| -0.8 | Round 7 | ZHANG | 7 | 3NT | ♠T | +1 | +0 |
| -0.9 | Round 6 | BERNAL | 27 | 4♦ | ♥8 | +2 | -6 |
| -1.0 | Round 4 | LAKO | 19 | 2♥ | ♠2 | = | +1 |
| -1.1 | Round 5 | CROATIA | 9 | 1NT | ♣3 | -2 | +0 |
| -1.1 | Round 6 | BERNAL | 15 | 4♥ | ♠A | -1 | -4 |
| -1.1 | Round 8 | ASHE | 22 | 3♠ | ♣Q | -2 | -5 |
| -1.3 | Round 7 | ZHANG | 13 | 3♠ | ♣3 | +1 | -1 |
| -1.4 | Round 8 | ASHE | 28 | 1NT | ♣3 | +1 | -1 |
| -1.6 | Round 5 | CROATIA | 6 | 4♥ | ♣5 | +2 | -1 |
| -1.7 | Round 8 | ASHE | 20 | 1♥ | ♠3 | +1 | +0 |
| -1.7 | Round 8 | ASHE | 27 | 2♥ | ♠A | +1 | -7 |
| -1.8 | Round 2 | EMI | 18 | 4♥ | ♣A | +1 | -1 |
| -1.8 | Round 7 | ZHANG | 2 | 3NT | ♥8 | +3 | -1 |
| -1.8 | Round 8 | ASHE | 21 | 3♣ | ♠T | -1 | -5 |
| -2.0 | Round 6 | BERNAL | 24 | 3NT | ♥4 | -2 | -5 |
| -2.2 | Round 8 | ASHE | 23 | 2♠ | ♦T | -1 | -12 |
| -2.3 | Round 1 | DAISY CHAIN | 10 | 1♥ | ♦4 | -1 | -11 |
| -2.3 | Round 2 | EMI | 22 | 2♠ | ♦3 | +1 | -10 |
| -2.4 | Round 4 | LAKO | 16 | 4♥ | ♣4 | -1 | -6 |
| -2.4 | Round 5 | CROATIA | 10 | 2♠ | ♣6 | = | -6 |
| -2.9 | Round 8 | ASHE | 16 | 3NT | ♠9 | -1 | -10 |
| -3.0 | Round 1 | DAISY CHAIN | 13 | 1NT | ♦4 | +2 | +0 |
| -3.0 | Round 2 | EMI | 21 | 4♥ | ♦A | = | +1 |
| -3.0 | Round 3 | BAHNICI | 3 | 4♠ | ♥9 | +1 | -11 |
| -3.4 | Round 2 | EMI | 23 | 4♠ | ♥K | -2 | -7 |
| -3.5 | Round 2 | EMI | 16 | 4♠ | ♥2 | +1 | +0 |
| -4.2 | Round 7 | ZHANG | 10 | 2NT | ♥T | = | +0 |
| -4.6 | Round 2 | EMI | 17 | 3♠ | ♣Q | -1 | -8 |
| -4.7 | Round 7 | ZHANG | 12 | 3NT | ♥Q | = | -7 |
| -4.9 | Round 8 | ASHE | 25 | 6♣ | ♠K | = | -7 |
| -5.0 | Round 1 | DAISY CHAIN | 5 | 3NT | ♠2 | +2 | +0 |
| -5.3 | Round 6 | BERNAL | 26 | 4♥ | ♦Q | = | +1 |
| -5.5 | Round 4 | LAKO | 20 | 4♠ | ♦A | -1 | +1 |
| -5.8 | Round 7 | ZHANG | 5 | 1♥x | ♥5 | -1 | -3 |
| -6.3 | Round 3 | BAHNICI | 2 | 3♣ | ♠J | +1 | -11 |
| -7.1 | Round 6 | BERNAL | 25 | 3NT | ♥5 | -2 | -8 |
| -7.6 | Round 4 | LAKO | 23 | 3♦x | ♥T | -2 | -9 |
| -8.0 | Round 6 | BERNAL | 17 | 4♥ | ♠4 | -1 | -8 |
| -9.0 | Round 3 | BAHNICI | 10 | 3NT | ♠5 | = | -10 |
| -9.1 | Round 1 | DAISY CHAIN | 7 | 6♠ | ♠4 | = | +0 |
| -10.2 | Round 4 | LAKO | 18 | 5♠ | ♦4 | -1 | -10 |