🇨🇦 CHENG Ziyu (Max) · CANADA
74rank
-22.9Butler · 104 bds
-0.22per board
±4.6swing
+0.85vs par /bd · #18/107
-0.30adjusted /bd
by round
vs par split: bidding +0.72 · play +0.12
Strength of schedule: opponents averaged -0.08/bd (an easy draw) → opponent-adjusted -0.30/bd
Card play — on target: opening leads 88.5% #15 of 107 · declarer play 70.0% #80 of 107 · defence 76.4% #94 of 107
Bidding activity — not a pass: 38.2% #90 of 107 (113/296)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 60.0% (5) | 95.2% (21) |
| Declarer play | 60.0% (10) | 75.0% (20) |
| Defence | 78.6% (14) | 75.6% (41) |
Opening leads by suit led: ♠ 100.0% (4) · ♥ 90.9% (11) · ♦ 66.7% (6) · ♣ 100.0% (5)
vs par by strain: NT +0.56 (27) · a suit +0.95 (77)
vs par by level: part-score +0.47 (34) · game +0.94 (65) · slam +2.20 (5)
By role: declaring +0.20/bd (-0.98 vs par · 49) · defending -0.60/bd (+2.47 vs par · 55)
By vulnerability: vulnerable -0.50/bd (+0.65 vs par · 52) · not vulnerable +0.06/bd (+1.04 vs par · 52)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | C.He | K.Macdonald – Z.Ross | Open | 8 | +2.1 | +0.26 | +0.88 |
| Round 2 | C.He | A.Thomas – S.Schuschny | Open | 8 | +1.8 | +0.23 | -0.12 |
| Round 3 | C.He | G.Biondillo Rodrigues – H.Salomao | Closed | 8 | -10.7 | -1.34 | -0.25 |
| Round 5 | C.He | Y.Niu – B.Jiang | Open | 8 | -13.7 | -1.71 | -0.62 |
| Round 7 | C.He | P.Kongngern – P.Phansamdaeng | Closed | 8 | -13.8 | -1.73 | -0.75 |
| Round 9 | C.He | R.Xiao – O.Schireson | Closed | 8 | +5.8 | +0.72 | +2.75 |
| Round 10 | C.He | K.Noguchi – T.Inami | Closed | 8 | +13.9 | +1.74 | +3.38 |
| Round 12 | C.He | M.Fragola – N.Tabata | Open | 8 | -8.3 | -1.04 | +1.00 |
| Round 13 | C.He | L.Draghi – M.Lombardi | Open | 8 | +14.2 | +1.77 | +4.00 |
| Round 15 | C.He | D.Kapiris – P.Skordas | Closed | 8 | +7.8 | +0.97 | +3.00 |
| Round 16 | C.He | D.Tylvad – C.Lahrmann | Closed | 8 | +13.8 | +1.73 | +1.88 |
| Round 18 | C.He | Y.Sliwowicz – O.Sabbah | Open | 8 | -19.8 | -2.48 | -2.88 |
| Round 19 | Q.Chen | Y.Poon – Y.Yun | Closed | 8 | -16.0 | -2.00 | -1.25 |
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 |
|---|---|---|---|---|---|---|---|
| +12.4 | Round 15 | 🇬🇷 GREECE | 20 | 5♣x | ♠2 | -2 | +15 |
| +11.6 | Round 1 | 🇦🇺 AUSTRALIA | 5 | 4♠ | ♥T | = | +15 |
| +10.8 | Round 10 | 🇯🇵 JAPAN | 10 | 6♦ | ♣A | = | +13 |
| +8.2 | Round 15 | 🇬🇷 GREECE | 17 | 3NT | ♦4 | -1 | +10 |
| +6.9 | Round 9 | 🇺🇸 USA2 | 3 | 3NT | ♦Q | -5 | +9 |
| +6.8 | Round 13 | 🇮🇹 ITALY | 7 | 4♠ | ♥3 | +2 | +13 |
| +6.8 | Round 16 | 🇩🇰 DENMARK | 31 | 4♠ | ♥K | = | +13 |
| +6.7 | Round 9 | 🇺🇸 USA2 | 5 | 3NT | ♠8 | = | +7 |
| +6.5 | Round 3 | 🇧🇷 BRAZIL | 17 | 4♥ | ♦J | = | +7 |
| +6.4 | Round 16 | 🇩🇰 DENMARK | 26 | 4♥ | ♣2 | -2 | +7 |
| +5.5 | Round 1 | 🇦🇺 AUSTRALIA | 8 | 2♦ | ♥5 | = | +11 |
| +4.9 | Round 2 | 🇦🇷 ARGENTINA | 12 | 3♠ | ♥K | -2 | +2 |
| +4.6 | Round 16 | 🇩🇰 DENMARK | 25 | 3NT | ♣2 | -1 | +6 |
| +4.1 | Round 10 | 🇯🇵 JAPAN | 9 | 6♠ | ♥T | = | +0 |
| +3.8 | Round 7 | 🇹🇭 THAILAND | 18 | 3NT | ♥Q | -2 | +5 |
| +3.6 | Round 2 | 🇦🇷 ARGENTINA | 14 | 4♠ | ♣5 | = | +8 |
| +3.6 | Round 13 | 🇮🇹 ITALY | 2 | 2♦ | ♥K | = | +5 |
| +3.5 | Round 13 | 🇮🇹 ITALY | 5 | 4♠ | ♣T | -1 | +5 |
| +3.2 | Round 16 | 🇩🇰 DENMARK | 32 | 3NT | ♣2 | -1 | +6 |
| +3.1 | Round 10 | 🇯🇵 JAPAN | 16 | 2♣ | ♥T | -1 | -4 |
| +3.1 | Round 12 | 🇫🇷 FRANCE | 28 | 4♠ | ♦6 | = | +7 |
| +2.3 | Round 7 | 🇹🇭 THAILAND | 19 | 4♥ | ♣9 | = | +0 |
| +2.3 | Round 10 | 🇯🇵 JAPAN | 14 | 3♥ | ♦K | -1 | +5 |
| +2.1 | Round 1 | 🇦🇺 AUSTRALIA | 6 | 2♦ | ♦3 | +1 | +1 |
| +2.1 | Round 16 | 🇩🇰 DENMARK | 30 | 3NT | ♥K | +2 | +0 |
| +2.1 | Round 18 | 🇮🇱 ISRAEL | 15 | 3NT | ♦2 | +1 | -1 |
| +2.0 | Round 5 | 🇨🇳 CHINA | 8 | 1NT | ♣2 | -2 | +0 |
| +1.9 | Round 9 | 🇺🇸 USA2 | 8 | 4♠ | ♦7 | -1 | +5 |
| +1.8 | Round 1 | 🇦🇺 AUSTRALIA | 7 | 3NT | ♣6 | +3 | +2 |
| +1.7 | Round 12 | 🇫🇷 FRANCE | 25 | 2♠ | ♥K | = | +7 |
| +1.6 | Round 3 | 🇧🇷 BRAZIL | 24 | 4♠ | ♥4 | -1 | +5 |
| +1.6 | Round 9 | 🇺🇸 USA2 | 4 | 4♥ | ♠8 | -2 | +8 |
| +1.6 | Round 19 | 🇭🇰 HONG KONG CHINA | 23 | 5♦ | ♥A | = | -13 |
| +1.4 | Round 7 | 🇹🇭 THAILAND | 20 | 2♠ | ♦6 | = | +1 |
| +1.3 | Round 10 | 🇯🇵 JAPAN | 15 | 1NT | ♠Q | = | +0 |
| +1.3 | Round 18 | 🇮🇱 ISRAEL | 11 | 4♠ | ♣2 | +1 | +0 |
| +1.2 | Round 9 | 🇺🇸 USA2 | 2 | 2NT | ♥9 | = | +0 |
| +1.2 | Round 10 | 🇯🇵 JAPAN | 11 | 3NT | ♥9 | +2 | +0 |
| +1.2 | Round 13 | 🇮🇹 ITALY | 1 | 3NT | ♦K | +1 | +11 |
| +1.2 | Round 15 | 🇬🇷 GREECE | 21 | 4♥ | ♦2 | +1 | +1 |
| +0.8 | Round 3 | 🇧🇷 BRAZIL | 19 | 2♠ | ♦J | = | +0 |
| +0.7 | Round 2 | 🇦🇷 ARGENTINA | 9 | 4♠ | ♥2 | = | +0 |
| +0.7 | Round 5 | 🇨🇳 CHINA | 4 | 3♦ | ♣A | +1 | +0 |
| +0.6 | Round 2 | 🇦🇷 ARGENTINA | 16 | 1NT | ♥K | = | -1 |
| +0.6 | Round 5 | 🇨🇳 CHINA | 7 | 4♠ | ♦2 | = | +0 |
| +0.6 | Round 9 | 🇺🇸 USA2 | 6 | 3♠ | ♣Q | -1 | -6 |
| +0.5 | Round 2 | 🇦🇷 ARGENTINA | 11 | 2♦ | ♥4 | +1 | +7 |
| +0.5 | Round 13 | 🇮🇹 ITALY | 6 | 5♦ | ♣A | -2 | +5 |
| +0.5 | Round 16 | 🇩🇰 DENMARK | 27 | 4♥ | ♣2 | = | -1 |
| +0.1 | Round 5 | 🇨🇳 CHINA | 1 | 3♠ | ♥2 | -1 | +4 |
| +0.1 | Round 5 | 🇨🇳 CHINA | 3 | 4♠ | ♦3 | = | +0 |
| +0.1 | Round 13 | 🇮🇹 ITALY | 3 | 3♠ | ♥A | = | -6 |
| +0.0 | Round 16 | 🇩🇰 DENMARK | 28 | 4♠ | ♣2 | = | -6 |
| -0.1 | Round 12 | 🇫🇷 FRANCE | 26 | 4♠ | ♣Q | = | +0 |
| -0.2 | Round 7 | 🇹🇭 THAILAND | 22 | 3NT | ♣7 | = | +0 |
| -0.4 | Round 13 | 🇮🇹 ITALY | 4 | 1NT | ♦2 | +1 | +0 |
| -0.4 | Round 15 | 🇬🇷 GREECE | 18 | 2♠ | ♦3 | = | +1 |
| -0.5 | Round 3 | 🇧🇷 BRAZIL | 21 | 1NT | ♦7 | +2 | -1 |
| -0.5 | Round 15 | 🇬🇷 GREECE | 19 | 4♠ | ♦A | +1 | +0 |
| -0.6 | Round 1 | 🇦🇺 AUSTRALIA | 4 | 2♠ | ♣Q | +1 | +0 |
| -0.6 | Round 3 | 🇧🇷 BRAZIL | 20 | 3NT | ♦5 | +1 | -1 |
| -0.6 | Round 19 | 🇭🇰 HONG KONG CHINA | 22 | 2♥ | ♥Q | -3 | +0 |
| -0.7 | Round 12 | 🇫🇷 FRANCE | 30 | 3♠ | ♥K | +2 | +6 |
| -0.7 | Round 12 | 🇫🇷 FRANCE | 32 | 4♥ | ♣K | +1 | +0 |
| -0.8 | Round 15 | 🇬🇷 GREECE | 23 | 2♦ | ♠A | +3 | +10 |
| -0.8 | Round 19 | 🇭🇰 HONG KONG CHINA | 17 | 4♠ | ♠A | = | -1 |
| -0.9 | Round 19 | 🇭🇰 HONG KONG CHINA | 24 | 4♦ | ♥Q | = | +0 |
| -1.1 | Round 13 | 🇮🇹 ITALY | 8 | 3NT | ♥7 | +1 | -1 |
| -1.4 | Round 2 | 🇦🇷 ARGENTINA | 13 | 3♥ | ♣A | -1 | -1 |
| -1.4 | Round 3 | 🇧🇷 BRAZIL | 22 | 3NT | ♦6 | = | +0 |
| -1.5 | Round 7 | 🇹🇭 THAILAND | 24 | 4♣ | ♠Q | -3 | -1 |
| -1.6 | Round 18 | 🇮🇱 ISRAEL | 9 | 4♥ | ♠J | +2 | -11 |
| -1.7 | Round 15 | 🇬🇷 GREECE | 24 | 4♥ | ♦6 | = | +0 |
| -1.7 | Round 19 | 🇭🇰 HONG KONG CHINA | 18 | 5♦ | ♠K | -1 | -2 |
| -1.7 | Round 19 | 🇭🇰 HONG KONG CHINA | 20 | 4♠ | ♦5 | = | +1 |
| -2.3 | Round 10 | 🇯🇵 JAPAN | 12 | 5♥x | ♠T | -1 | +0 |
| -2.3 | Round 18 | 🇮🇱 ISRAEL | 14 | 2NT | ♠4 | = | -6 |
| -2.3 | Round 18 | 🇮🇱 ISRAEL | 16 | 3NT | ♠2 | -1 | -5 |
| -2.6 | Round 2 | 🇦🇷 ARGENTINA | 15 | 4♠ | ♥7 | -1 | -10 |
| -2.8 | Round 12 | 🇫🇷 FRANCE | 31 | 4♠ | ♠7 | +2 | -11 |
| -2.9 | Round 18 | 🇮🇱 ISRAEL | 13 | 4♥ | ♠4 | +1 | +0 |
| -3.1 | Round 12 | 🇫🇷 FRANCE | 29 | 2♠ | ♣A | +1 | -1 |
| -3.7 | Round 3 | 🇧🇷 BRAZIL | 23 | 4♥ | ♣Q | +1 | +0 |
| -3.8 | Round 19 | 🇭🇰 HONG KONG CHINA | 21 | 4♠ | ♣3 | -2 | -7 |
| -4.5 | Round 2 | 🇦🇷 ARGENTINA | 10 | 2♥ | ♦Q | +1 | -6 |
| -4.6 | Round 1 | 🇦🇺 AUSTRALIA | 3 | 3♣ | ♦7 | -1 | -1 |
| -4.6 | Round 9 | 🇺🇸 USA2 | 7 | 2♦ | ♣K | +1 | +0 |
| -4.7 | Round 5 | 🇨🇳 CHINA | 2 | 4♥ | ♠K | -1 | +1 |
| -4.7 | Round 7 | 🇹🇭 THAILAND | 17 | 4♥ | ♠A | -3 | -1 |
| -5.2 | Round 5 | 🇨🇳 CHINA | 5 | 2♠ | ♥K | +1 | -10 |
| -5.3 | Round 18 | 🇮🇱 ISRAEL | 10 | 4♠ | ♥6 | = | +13 |
| -5.6 | Round 7 | 🇹🇭 THAILAND | 23 | 4♠ | ♥2 | -2 | -8 |
| -5.7 | Round 12 | 🇫🇷 FRANCE | 27 | 4♠ | ♠5 | = | +0 |
| -6.6 | Round 1 | 🇦🇺 AUSTRALIA | 1 | 5♣ | ♠K | -2 | -11 |
| -6.6 | Round 10 | 🇯🇵 JAPAN | 13 | 6♠ | ♣7 | +1 | +13 |
| -7.1 | Round 1 | 🇦🇺 AUSTRALIA | 2 | 4♠ | ♦Q | -3 | -10 |
| -7.3 | Round 5 | 🇨🇳 CHINA | 6 | 3NT | ♥6 | = | +0 |
| -8.1 | Round 19 | 🇭🇰 HONG KONG CHINA | 19 | 4♥ | ♣K | +1 | +12 |
| -8.5 | Round 9 | 🇺🇸 USA2 | 1 | 4♠ | ♥4 | = | -1 |
| -8.8 | Round 18 | 🇮🇱 ISRAEL | 12 | 4♠ | ♦J | -2 | -13 |
| -9.3 | Round 7 | 🇹🇭 THAILAND | 21 | 6NT | ♥5 | = | -2 |
| -9.8 | Round 16 | 🇩🇰 DENMARK | 29 | 3NT | ♣2 | -3 | -10 |
| -10.6 | Round 15 | 🇬🇷 GREECE | 22 | 6NT | ♣9 | -1 | -13 |
| -13.4 | Round 3 | 🇧🇷 BRAZIL | 18 | 4♥x | ♦K | = | -12 |