🇳🇱 BOONSTRA Aafko · NETHERLANDS
21rank
+43.2Butler · 96 bds
+0.45per board
±4.2swing
-0.16vs par /bd · #52/111
+0.30adjusted /bd
by round
vs par split: bidding -0.03 · play -0.24
Strength of schedule: opponents averaged -0.15/bd (an easy draw) → opponent-adjusted +0.30/bd
Card play — on target: opening leads 75.9% #88 of 111 · declarer play 68.2% #81 of 111 · defence 80.9% #84 of 111
Bidding activity — not a pass: 42.9% #57 of 111 (115/268)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 50.0% (4) | 80.0% (25) |
| Declarer play | 0.0% (1) | 71.4% (21) |
| Defence | 62.5% (8) | 84.6% (39) |
Opening leads by suit led: ♠ 42.9% (7) · ♥ 75.0% (4) · ♦ 88.9% (9) · ♣ 88.9% (9)
vs par by strain: NT -1.00 (18) · a suit +0.04 (78)
vs par by level: part-score -0.17 (36) · game -0.16 (56) · slam +0.00 (4)
By role: declaring +0.42/bd (-1.96 vs par · 49) · defending +0.48/bd (+1.72 vs par · 47)
By vulnerability: vulnerable +0.99/bd (+0.02 vs par · 48) · not vulnerable -0.09/bd (-0.33 vs par · 48)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 2 | B.Van Noort | R.Zvorovski – R.Toom | Closed | 8 | +7.6 | +0.95 | -0.25 |
| Round 4 | B.Van Noort | R.Bloch – E.Vallet | Closed | 8 | +3.0 | +0.38 | -0.75 |
| Round 5 | B.Van Noort | R.Nunez – C.Nunez | Closed | 8 | +4.9 | +0.61 | -0.62 |
| Round 6 | B.Van Noort | C.Chiang – Y.Cheng | Closed | 8 | -5.5 | -0.69 | -1.12 |
| Round 7 | B.Van Noort | A.Manganella – S.Scata | Closed | 8 | -8.0 | -1.00 | +0.00 |
| Round 9 | B.Van Noort | Z.Ferov – D.Lazarov | Closed | 8 | -4.6 | -0.57 | -2.88 |
| Round 10 | B.Van Noort | J.Lieberman – C.Welland | Closed | 8 | +3.8 | +0.47 | -0.12 |
| Round 12 | B.Van Noort | P.Beer – H.Xing | Open | 8 | +11.1 | +1.39 | -0.50 |
| Round 14 | B.Van Noort | D.Nobira – D.Rahayu | Closed | 8 | +2.0 | +0.25 | +1.25 |
| Round 15 | B.Van Noort | Y.Li – Q.Tan | Closed | 8 | -0.4 | -0.05 | -3.00 |
| Round 17 | B.Van Noort | J.Shearer – N.Tennant | Closed | 8 | +9.5 | +1.19 | +2.38 |
| Round 18 | B.Van Noort | S.Kar – S.Bar | Closed | 8 | +19.8 | +2.48 | +3.75 |
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 |
|---|---|---|---|---|---|---|---|
| +13.7 | Round 6 | 🇹🇼 CHINESE TAIPEI | 13 | 6♥ | ♦2 | -2 | +13 |
| +10.8 | Round 12 | 🇺🇸 USA1 | 31 | 4♥ | ♦3 | -2 | +14 |
| +10.0 | Round 15 | 🇨🇳 CHINA | 21 | 3NT | ♦3 | -1 | +10 |
| +9.2 | Round 2 | 🇪🇪 ESTONIA | 15 | 4♠ | ♥7 | = | +0 |
| +8.5 | Round 4 | 🇫🇷 FRANCE | 26 | 3NT | ♠A | +1 | +0 |
| +7.7 | Round 10 | 🇺🇸 USA2 | 10 | 5♠x | ♦K | -1 | +7 |
| +6.8 | Round 15 | 🇨🇳 CHINA | 19 | 4♠x | ♥A | +1 | +6 |
| +6.3 | Round 5 | 🇦🇷 ARGENTINA | 2 | 5♥ | ♠K | -2 | +2 |
| +6.3 | Round 14 | 🇮🇩 INDONESIA | 10 | 5♣ | ♠J | = | +0 |
| +5.9 | Round 18 | 🇮🇳 INDIA | 15 | 4♠ | ♦8 | -1 | +13 |
| +5.8 | Round 18 | 🇮🇳 INDIA | 10 | 4♠ | ♥6 | +1 | -12 |
| +5.2 | Round 18 | 🇮🇳 INDIA | 12 | 2♥ | . | -1 | +11 |
| +4.9 | Round 5 | 🇦🇷 ARGENTINA | 5 | 2♠ | ♦Q | = | +9 |
| +4.8 | Round 2 | 🇪🇪 ESTONIA | 11 | 4♦ | ♠5 | -1 | +10 |
| +4.6 | Round 4 | 🇫🇷 FRANCE | 25 | 4♠ | ♥T | = | +0 |
| +4.6 | Round 12 | 🇺🇸 USA1 | 30 | 3NT | ♦J | +1 | +0 |
| +4.3 | Round 4 | 🇫🇷 FRANCE | 28 | 3♥x | ♠A | -2 | +14 |
| +4.2 | Round 6 | 🇹🇼 CHINESE TAIPEI | 10 | 5♣ | ♥K | = | +0 |
| +4.2 | Round 17 | 🏴 SCOTLAND | 3 | 2♣ | ♦5 | = | -1 |
| +4.1 | Round 2 | 🇪🇪 ESTONIA | 10 | 3♥ | ♣K | -2 | +3 |
| +3.8 | Round 7 | 🇮🇹 ITALY | 18 | 5♦ | ♣8 | -2 | +5 |
| +3.6 | Round 18 | 🇮🇳 INDIA | 13 | 4♥ | ♠3 | +1 | +0 |
| +3.5 | Round 10 | 🇺🇸 USA2 | 12 | 4♠ | ♥A | = | +6 |
| +3.4 | Round 15 | 🇨🇳 CHINA | 20 | 4♠x | ♦Q | -2 | -3 |
| +2.8 | Round 9 | 🇧🇬 BULGARIA | 5 | 3NT | ♦3 | -2 | +6 |
| +2.3 | Round 14 | 🇮🇩 INDONESIA | 16 | 3♠ | ♥Q | +1 | +10 |
| +2.2 | Round 12 | 🇺🇸 USA1 | 29 | 3♦ | ♠9 | -2 | +3 |
| +2.1 | Round 7 | 🇮🇹 ITALY | 19 | 3NT | ♣6 | +1 | +0 |
| +2.1 | Round 7 | 🇮🇹 ITALY | 22 | 3NT | ♦A | +1 | +1 |
| +2.1 | Round 17 | 🏴 SCOTLAND | 4 | 2♠ | ♦K | = | +0 |
| +1.8 | Round 17 | 🏴 SCOTLAND | 6 | 4♥ | ♦4 | = | +0 |
| +1.8 | Round 17 | 🏴 SCOTLAND | 7 | 4♦ | ♣9 | -4 | +6 |
| +1.7 | Round 9 | 🇧🇬 BULGARIA | 6 | 2♥ | ♣3 | = | +6 |
| +1.5 | Round 18 | 🇮🇳 INDIA | 9 | 4♥ | ♦T | +1 | +11 |
| +1.4 | Round 12 | 🇺🇸 USA1 | 25 | 2♠ | ♥A | +2 | -6 |
| +1.3 | Round 4 | 🇫🇷 FRANCE | 32 | 6NT | ♦3 | = | -11 |
| +1.3 | Round 15 | 🇨🇳 CHINA | 18 | 2♠ | ♥K | = | -1 |
| +0.7 | Round 6 | 🇹🇼 CHINESE TAIPEI | 14 | 6♦ | ♠9 | = | -2 |
| +0.7 | Round 7 | 🇮🇹 ITALY | 21 | 5♣ | ♦8 | +1 | +11 |
| +0.6 | Round 17 | 🏴 SCOTLAND | 1 | 4♠ | ♥Q | +2 | +11 |
| +0.5 | Round 18 | 🇮🇳 INDIA | 11 | 4♠ | ♠A | +1 | +0 |
| +0.4 | Round 18 | 🇮🇳 INDIA | 16 | 3NT | ♥5 | -1 | +5 |
| +0.3 | Round 2 | 🇪🇪 ESTONIA | 13 | 3♥ | ♣A | -1 | -1 |
| +0.2 | Round 14 | 🇮🇩 INDONESIA | 15 | 2♠ | ♥5 | +1 | +0 |
| +0.1 | Round 4 | 🇫🇷 FRANCE | 29 | 5♦ | ♥A | = | -2 |
| +0.1 | Round 5 | 🇦🇷 ARGENTINA | 3 | 4♠ | ♦3 | = | +0 |
| +0.1 | Round 12 | 🇺🇸 USA1 | 32 | 4♥ | ♦9 | +1 | +0 |
| +0.1 | Round 17 | 🏴 SCOTLAND | 8 | 2♥ | ♦3 | -1 | +2 |
| +0.0 | Round 9 | 🇧🇬 BULGARIA | 2 | 3♣ | ♥6 | +1 | +0 |
| -0.1 | Round 5 | 🇦🇷 ARGENTINA | 1 | 4♠ | ♦7 | -1 | -4 |
| -0.1 | Round 6 | 🇹🇼 CHINESE TAIPEI | 12 | 1NT | ♥5 | +1 | -5 |
| -0.4 | Round 17 | 🏴 SCOTLAND | 2 | 3♣ | ♦A | +1 | +0 |
| -0.5 | Round 10 | 🇺🇸 USA2 | 15 | 3♣ | ♣5 | -1 | +2 |
| -0.7 | Round 5 | 🇦🇷 ARGENTINA | 7 | 4♠ | ♥6 | = | +0 |
| -0.7 | Round 14 | 🇮🇩 INDONESIA | 11 | 2♥ | ♠K | +5 | +1 |
| -0.7 | Round 17 | 🏴 SCOTLAND | 5 | 3NT | ♣K | +1 | +1 |
| -0.8 | Round 7 | 🇮🇹 ITALY | 24 | 1NT | ♠3 | +1 | +0 |
| -0.9 | Round 2 | 🇪🇪 ESTONIA | 14 | 5♥ | ♠3 | -3 | +2 |
| -0.9 | Round 10 | 🇺🇸 USA2 | 16 | 5♣ | ♦A | -2 | +5 |
| -1.0 | Round 10 | 🇺🇸 USA2 | 11 | 3NT | ♥8 | +1 | +1 |
| -1.1 | Round 14 | 🇮🇩 INDONESIA | 13 | 4♠ | ♦7 | +1 | +0 |
| -1.2 | Round 9 | 🇧🇬 BULGARIA | 8 | 4♠ | ♥K | -1 | -5 |
| -1.2 | Round 10 | 🇺🇸 USA2 | 9 | 6♠ | ♠T | = | +0 |
| -1.2 | Round 12 | 🇺🇸 USA1 | 26 | 4♠ | ♣K | = | +0 |
| -1.2 | Round 14 | 🇮🇩 INDONESIA | 14 | 4♥ | ♦7 | +1 | +0 |
| -1.3 | Round 5 | 🇦🇷 ARGENTINA | 6 | 2♠ | ♣2 | +1 | -10 |
| -1.3 | Round 9 | 🇧🇬 BULGARIA | 1 | 4♠ | ♥3 | -1 | -10 |
| -1.3 | Round 14 | 🇮🇩 INDONESIA | 12 | 3NT | ♣3 | +3 | -1 |
| -1.4 | Round 5 | 🇦🇷 ARGENTINA | 4 | 4♦ | ♥8 | = | +0 |
| -1.5 | Round 9 | 🇧🇬 BULGARIA | 7 | 2♠ | ♣A | = | -6 |
| -1.7 | Round 2 | 🇪🇪 ESTONIA | 12 | 4♥ | ♠K | -1 | -5 |
| -1.9 | Round 10 | 🇺🇸 USA2 | 13 | 4♠ | ♣4 | +2 | -17 |
| -1.9 | Round 10 | 🇺🇸 USA2 | 14 | 3♥ | ♦K | -1 | -5 |
| -2.4 | Round 9 | 🇧🇬 BULGARIA | 3 | 3♠ | ♣3 | = | -6 |
| -2.5 | Round 14 | 🇮🇩 INDONESIA | 9 | 2♠ | ♦Q | = | +0 |
| -2.7 | Round 9 | 🇧🇬 BULGARIA | 4 | 3NT | ♥3 | -2 | -8 |
| -2.9 | Round 5 | 🇦🇷 ARGENTINA | 8 | 3♦ | ♥J | -3 | -2 |
| -2.9 | Round 12 | 🇺🇸 USA1 | 27 | 3♥ | ♣8 | -2 | -8 |
| -3.0 | Round 15 | 🇨🇳 CHINA | 22 | 3♠x | ♦A | -4 | -4 |
| -3.1 | Round 18 | 🇮🇳 INDIA | 14 | 3NT | ♠6 | -1 | +2 |
| -3.2 | Round 4 | 🇫🇷 FRANCE | 31 | 2♥ | ♦Q | +1 | -1 |
| -3.4 | Round 7 | 🇮🇹 ITALY | 17 | 4♥ | ♠A | -3 | -1 |
| -3.9 | Round 2 | 🇪🇪 ESTONIA | 16 | 2♥ | ♣3 | +1 | -6 |
| -3.9 | Round 6 | 🇹🇼 CHINESE TAIPEI | 15 | 4♠ | ♥2 | = | +0 |
| -3.9 | Round 12 | 🇺🇸 USA1 | 28 | 4♠ | ♦6 | = | -7 |
| -4.0 | Round 15 | 🇨🇳 CHINA | 23 | 2♠ | ♠2 | = | -12 |
| -4.3 | Round 2 | 🇪🇪 ESTONIA | 9 | 4♠x | ♦5 | = | -5 |
| -4.7 | Round 7 | 🇮🇹 ITALY | 20 | 1NT | ♥K | -3 | -4 |
| -5.3 | Round 4 | 🇫🇷 FRANCE | 30 | 4♠ | ♥K | -2 | -5 |
| -5.5 | Round 6 | 🇹🇼 CHINESE TAIPEI | 11 | 1NTx | ♥J | -2 | -5 |
| -6.0 | Round 6 | 🇹🇼 CHINESE TAIPEI | 16 | 4♥x | ♠Q | -2 | -5 |
| -6.3 | Round 15 | 🇨🇳 CHINA | 17 | 3NT | ♣5 | -1 | -10 |
| -7.3 | Round 4 | 🇫🇷 FRANCE | 27 | 4♥ | ♦Q | +1 | -1 |
| -7.8 | Round 7 | 🇮🇹 ITALY | 23 | 4♠x | ♥3 | -2 | -12 |
| -8.6 | Round 6 | 🇹🇼 CHINESE TAIPEI | 9 | 5♦x | ♠A | -2 | -5 |
| -8.6 | Round 15 | 🇨🇳 CHINA | 24 | 4♥ | ♠8 | -1 | -10 |