CHEN Jun · CHINA OPEN 2
vs par split: bidding +0.14 · play +0.17
Strength of schedule: opponents averaged +0.05/bd (a tough draw) → opponent-adjusted -0.01/bd
Card play — on target: opening leads 94.4% #10 of 675 · declarer play 72.0% #452 of 675 · defence 92.5% #74 of 675
Bidding activity — not a pass: 45.3% #218 of 675 (117/258)
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 83.3% (6) | 100.0% (12) |
| Declarer play | 66.7% (9) | 75.0% (16) |
| Defence | 83.3% (12) | 96.4% (28) |
Opening leads by suit led: ♠ 100.0% (3) · ♥ 100.0% (8) · ♦ 83.3% (6) · ♣ 100.0% (1)
vs par by strain: NT -0.54 (26) · a suit +0.69 (58)
vs par by level: part-score +0.38 (24) · game +0.02 (53) · slam +2.29 (7)
By role: declaring -0.51/bd (-1.91 vs par · 44) · defending +0.42/bd (+2.75 vs par · 40)
By vulnerability: vulnerable -0.09/bd (+0.29 vs par · 42) · not vulnerable -0.04/bd (+0.33 vs par · 42)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Round 1 | J.Zhang | A.Zobu – V.Aronov | Open | 14 | -12.4 | -0.89 | -1.79 |
| Round 2 | J.Zhang | E.Rodwell – D.Simson | Closed | 14 | +4.1 | +0.29 | +2.64 |
| Round 4 | J.Zhang | S.Kushari – K.Bendre | Open | 14 | +20.3 | +1.45 | +2.29 |
| Round 5 | J.Zhang | L.Lantaron – F.Piedra | Closed | 14 | -14.9 | -1.06 | -2.50 |
| Round 7 | J.Zhang | M.Urbanski – P.Chindelewicz | Closed | 14 | +31.7 | +2.26 | +1.93 |
| Round 8 | J.Zhang | V.Demuy – J.Kranyak | Closed | 14 | -34.3 | -2.45 | -0.71 |
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 |
|---|---|---|---|---|---|---|---|
| +13.1 | Round 7 | MAGIC | 7 | 4♥x | ♠J | -2 | +15 |
| +12.9 | Round 4 | FORMIDABLES | 17 | 6♦x | ♠6 | +1 | +12 |
| +12.4 | Round 2 | SIMSON | 19 | 3♦x | ♥K | = | +14 |
| +9.3 | Round 7 | MAGIC | 2 | 6♦ | ♠A | = | +0 |
| +8.1 | Round 8 | SILVER SURFERS | 23 | 4♠x | ♥2 | -1 | +8 |
| +7.5 | Round 7 | MAGIC | 12 | 2NT | ♥2 | = | +11 |
| +6.8 | Round 5 | MSV | 12 | 3NT | ♥2 | +1 | +1 |
| +6.4 | Round 2 | SIMSON | 20 | 6NTx | ♣4 | -1 | +13 |
| +6.2 | Round 1 | KUPCLUB | 9 | 4♥ | ♦3 | = | +3 |
| +6.1 | Round 5 | MSV | 4 | 3NT | ♣2 | = | -1 |
| +5.8 | Round 1 | KUPCLUB | 3 | 4♥ | ♠9 | = | +10 |
| +5.8 | Round 2 | SIMSON | 18 | 2♦ | ♥Q | -2 | +7 |
| +5.2 | Round 8 | SILVER SURFERS | 25 | 1♠x | ♥7 | = | +7 |
| +4.8 | Round 4 | FORMIDABLES | 15 | 3NTx | ♣5 | = | +3 |
| +4.6 | Round 4 | FORMIDABLES | 20 | 3NT | ♣J | -1 | +6 |
| +4.5 | Round 5 | MSV | 8 | 4♥ | ♠Q | -1 | +5 |
| +4.0 | Round 7 | MAGIC | 9 | 1NT | ♠2 | +1 | +0 |
| +4.0 | Round 7 | MAGIC | 14 | 4♠x | ♦5 | -3 | +2 |
| +3.9 | Round 4 | FORMIDABLES | 25 | 4♠ | ♦K | -2 | +6 |
| +3.6 | Round 4 | FORMIDABLES | 23 | 3NT | ♥T | -1 | +12 |
| +3.3 | Round 1 | KUPCLUB | 2 | 3♠ | ♣8 | -1 | +12 |
| +3.3 | Round 2 | SIMSON | 27 | 4♠ | ♥6 | -1 | +5 |
| +3.3 | Round 7 | MAGIC | 10 | 2♠ | ♥Q | -4 | -6 |
| +3.1 | Round 7 | MAGIC | 11 | 5♣ | ♠6 | -1 | +5 |
| +3.0 | Round 8 | SILVER SURFERS | 27 | 5♣ | ♦A | -1 | +8 |
| +2.6 | Round 2 | SIMSON | 22 | 6♣ | ♠2 | +1 | +11 |
| +2.5 | Round 4 | FORMIDABLES | 24 | 4♠ | ♦T | -1 | +10 |
| +2.2 | Round 7 | MAGIC | 8 | 3NT | ♥9 | -1 | +5 |
| +2.1 | Round 1 | KUPCLUB | 4 | 6♠ | ♦6 | +1 | -13 |
| +2.1 | Round 2 | SIMSON | 24 | 2♦ | ♦6 | +1 | +0 |
| +2.1 | Round 8 | SILVER SURFERS | 22 | 4♠ | ♥7 | = | +0 |
| +1.9 | Round 1 | KUPCLUB | 12 | 4♥ | ♦K | = | +0 |
| +1.0 | Round 1 | KUPCLUB | 10 | 2♥ | ♦J | +1 | +10 |
| +0.8 | Round 4 | FORMIDABLES | 18 | 5♠ | ♥K | +1 | +12 |
| +0.8 | Round 4 | FORMIDABLES | 27 | 3NT | ♠J | = | +0 |
| +0.8 | Round 7 | MAGIC | 6 | 3♦ | ♠J | = | +1 |
| +0.5 | Round 2 | SIMSON | 28 | 3NT | ♥2 | +1 | +0 |
| +0.4 | Round 5 | MSV | 3 | 4♥ | ♣9 | = | +1 |
| +0.0 | Round 8 | SILVER SURFERS | 15 | 2♠ | ♦6 | = | +0 |
| -0.2 | Round 5 | MSV | 14 | 2♦x | ♠K | -2 | +3 |
| -0.2 | Round 7 | MAGIC | 1 | 4♠ | ♥3 | +1 | +0 |
| -0.3 | Round 2 | SIMSON | 16 | 1NT | ♦8 | = | -5 |
| -0.3 | Round 8 | SILVER SURFERS | 21 | 5♥x | ♣7 | -3 | +0 |
| -0.4 | Round 4 | FORMIDABLES | 16 | 3NT | ♥5 | = | +1 |
| -0.7 | Round 7 | MAGIC | 5 | 2♠ | ♦K | = | -1 |
| -1.1 | Round 4 | FORMIDABLES | 19 | 2♥ | ♦7 | -2 | -11 |
| -1.2 | Round 1 | KUPCLUB | 14 | 4♠ | ♣K | -1 | -4 |
| -1.3 | Round 5 | MSV | 6 | 5♦ | ♣K | = | +2 |
| -1.4 | Round 5 | MSV | 1 | 3NT | ♦8 | +1 | +0 |
| -1.5 | Round 5 | MSV | 7 | 3NT | ♠2 | +3 | -13 |
| -1.7 | Round 2 | SIMSON | 15 | 3NT | ♠2 | +2 | -1 |
| -1.7 | Round 2 | SIMSON | 23 | 5♣ | ♥K | +1 | +10 |
| -1.7 | Round 5 | MSV | 10 | 1NT | ♥J | +1 | -6 |
| -1.8 | Round 1 | KUPCLUB | 1 | 3NT | ♠5 | -2 | -5 |
| -1.8 | Round 8 | SILVER SURFERS | 20 | 4♠ | ♦Q | = | +1 |
| -1.9 | Round 8 | SILVER SURFERS | 19 | 3♦ | ♣Q | +1 | +0 |
| -2.1 | Round 1 | KUPCLUB | 8 | 4♠ | ♥5 | -1 | -5 |
| -2.3 | Round 4 | FORMIDABLES | 28 | 4♠ | ♦4 | = | -1 |
| -2.4 | Round 4 | FORMIDABLES | 21 | 3♣ | ♣6 | -2 | -5 |
| -2.6 | Round 5 | MSV | 11 | 3NT | ♥3 | +1 | -1 |
| -2.7 | Round 7 | MAGIC | 13 | 3♥ | ♣A | +1 | +1 |
| -2.8 | Round 2 | SIMSON | 17 | 3NT | ♠8 | = | +1 |
| -3.0 | Round 1 | KUPCLUB | 6 | 4♦ | ♠J | = | +1 |
| -3.0 | Round 8 | SILVER SURFERS | 26 | 4♥ | ♠A | +1 | +0 |
| -3.4 | Round 4 | FORMIDABLES | 22 | 2NT | ♣6 | -2 | -3 |
| -3.5 | Round 7 | MAGIC | 3 | 3♠ | ♦J | = | -6 |
| -3.5 | Round 8 | SILVER SURFERS | 18 | 2NT | ♣7 | -2 | -5 |
| -3.6 | Round 5 | MSV | 5 | 4♥x | ♣7 | -1 | +0 |
| -3.7 | Round 2 | SIMSON | 21 | 4♥ | ♥7 | -1 | -5 |
| -3.9 | Round 1 | KUPCLUB | 5 | 3NT | ♠6 | -1 | -5 |
| -4.0 | Round 4 | FORMIDABLES | 26 | 2♠ | ♣6 | +1 | -10 |
| -4.1 | Round 1 | KUPCLUB | 7 | 4♠ | ♦7 | -1 | -12 |
| -5.5 | Round 5 | MSV | 9 | 4NT | ♠7 | -4 | -6 |
| -5.6 | Round 5 | MSV | 2 | 3NT | ♣Q | -1 | -10 |
| -7.6 | Round 1 | KUPCLUB | 13 | 3NT | ♣6 | -1 | -6 |
| -8.1 | Round 2 | SIMSON | 25 | 5♠x | ♣6 | -3 | -8 |
| -8.4 | Round 8 | SILVER SURFERS | 24 | 5♣x | ♥K | -4 | -8 |
| -8.5 | Round 7 | MAGIC | 4 | 5♥x | ♠7 | -2 | +0 |
| -9.0 | Round 1 | KUPCLUB | 11 | 5♥ | ♣A | -1 | -11 |
| -9.3 | Round 5 | MSV | 13 | 4♠ | ♥2 | = | -10 |
| -10.3 | Round 8 | SILVER SURFERS | 16 | 6♥ | ♣K | = | +0 |
| -10.7 | Round 2 | SIMSON | 26 | 4♥x | ♣2 | = | -5 |
| -11.5 | Round 8 | SILVER SURFERS | 28 | 4♠ | ♥4 | +3 | -14 |
| -12.0 | Round 8 | SILVER SURFERS | 17 | 6♣x | ♥K | = | -7 |