Simulation 8Z21 Main

# Stayman or Not IV

by Richard Pavlicek

[First read Stayman or Not? and Parts II and III]

What about an almost flat hand (4-4-3-2) when the doubleton consists of two honors? Suppose:

 West North1 NT EastPass South? J 7 4 3 K 5 4 Q J A 9 7 2

Should you use Stayman? Or bid 3 NT directly?

For a simulation I created 10,000 random deals with the South hand fixed. North: 15-17 HCP; balanced; 4-5 spades (if 5 spades, doubleton must be J-x or better). Further, East was constrained not to have any appropriate action (bid or double) over 1 NT; and West not to have extreme shape (freakness 6+) with 7+ playing tricks.

Results are shown below. Trick Average shows the average number of tricks won by declarer. Make Percent shows how often the contract is made (including with overtrick) and Overtrick Percent how often an overtrick is made. The second table compares the bids directly, with the better choice leftmost. Net W-L (matchpoints or board-a-match verdict) counts +1 for a win and -1 for a loss. Net Score and Net IMPs are calculated twice, first with declarer nonvul (green) then with declarer vul (red). Plus values show the net gain over 10,000 deals.

I thought this would be close, but results clearly favor the spade fit, and the edge is certainly great enough to overcome any loss from revealing information to the defenders. While one example hand is hardly proof, it appears that 4-3-3-3 shape is the only justification to eschew Stayman.

Results for 10,000 Deals
ContractTrick AverageMake PercentOvertrick Percent
3 NT9.002368.3334.30
4 9.987372.3027.82

ComparisonNet W-LNet ScoreNet IMPsNet ScoreNet IMPs
4 vs. 3 NT+3050+322,640+9809+461,390+11,175

### Actual Deals

Below are 100 of the 10,000 deals, including the first 20, last 20, and 60 in-between with the greatest IMP gains (30 for each option). Numbers after each contract show the tricks won by declarer with double-dummy play all-around.

 1. A Q 10 8 6 Q 7 A 8 6 K 10 3 K 5 2 A 10 6 3 2 K 10 9 J 6 9 J 9 8 7 5 4 3 2 Q 8 5 4 3 NT → 114 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 2. A Q 9 2 8 2 A K 4 3 K J 10 8 6 5 Q J 10 7 6 10 7 5 8 6 K 10 A 9 3 9 8 6 2 Q 5 4 3 3 NT → 104 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 3. A 8 6 2 A 6 A 10 9 K J 10 5 K 10 Q J 10 9 8 3 5 4 2 Q 3 Q 9 5 7 2 K 8 7 6 3 8 6 4 3 NT → 104 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 4. A Q 6 2 A J 8 6 K 7 3 K 8 8 5 Q 10 9 7 3 9 2 Q 6 4 3 K 10 9 2 A 10 8 6 5 4 J 10 5 3 NT → 104 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 5. A K 8 5 A 10 10 8 4 K J 10 6 — J 9 7 2 K 9 5 3 2 Q 8 5 3 Q 10 9 6 2 Q 8 6 3 A 7 6 4 3 NT → 94 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 6. A K 10 9 A 8 3 10 8 4 K Q 6 Q 8 5 Q 10 9 7 2 K 6 5 5 3 6 2 J 6 A 9 7 3 2 J 10 8 4 3 NT → 104 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 7. K Q 10 2 A 10 7 3 A K J 6 5 A 9 Q J 9 8 6 10 9 7 3 2 10 8 6 5 2 8 6 5 4 K Q 8 4 3 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 8. A Q 10 8 A 8 2 A 9 2 Q 5 3 K 9 5 Q 9 7 6 3 4 K J 8 4 6 2 J 10 K 10 8 7 6 5 3 10 6 3 NT → 104 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9. A K Q 2 Q J 9 10 7 5 Q J 3 10 9 8 A 8 6 2 A 8 K 8 6 5 6 5 10 7 3 K 9 6 4 3 2 10 4 3 NT → 94 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 10. A K 8 2 J 6 3 A 7 6 K 4 3 10 5 A 2 K 5 4 3 2 Q J 6 5 Q 9 6 Q 10 9 8 7 10 9 8 10 8 3 NT → 84 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 11. A Q 9 5 A 9 K 7 4 3 Q 5 3 K 6 Q J 10 8 7 9 6 5 K 6 4 10 8 2 6 3 2 A 10 8 2 J 10 8 3 NT → 104 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 12. A K Q 9 Q 3 9 5 4 K Q 8 5 10 5 J 9 7 2 K 10 8 6 10 4 3 8 6 2 A 10 8 6 A 7 3 2 J 6 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 13. A Q 9 6 2 Q 6 A 4 3 K J 6 10 8 J 9 7 K 7 6 2 8 5 4 3 K 5 A 10 8 3 2 10 9 8 5 Q 10 3 NT → 104 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 14. A K 9 8 6 Q J 6 A 9 3 Q 8 10 2 10 9 8 3 2 10 6 4 K 10 4 Q 5 A 7 K 8 7 5 2 J 6 5 3 3 NT → 104 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 15. Q 10 6 2 A J K 9 6 2 K Q 5 K 5 10 8 7 6 2 10 8 7 4 3 4 A 9 8 Q 9 3 A 5 J 10 8 6 3 3 NT → 94 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 16. A Q 10 8 Q J 2 A 6 Q 10 5 3 9 6 5 10 9 8 3 10 5 4 3 J 6 K 2 A 7 6 K 9 8 7 2 K 8 4 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 17. K 6 5 2 A J A K 8 3 6 5 3 Q 8 Q 9 3 10 9 7 5 2 Q 8 4 A 10 9 10 8 7 6 2 6 4 K J 10 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 18. A K 8 5 J 7 3 K 4 3 K J 10 10 6 Q 10 8 A 9 8 5 2 6 5 4 Q 9 2 A 9 6 2 10 7 6 Q 8 3 3 NT → 94 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 19. K Q 9 5 A Q 8 6 10 4 3 K J 8 2 10 7 3 2 A 8 2 Q 8 4 3 A 10 6 J 9 K 9 7 6 5 10 6 5 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 20. K Q 9 2 Q J 7 A 8 6 4 K 4 6 5 A 9 6 K 5 3 2 J 10 6 3 A 10 8 10 8 3 2 10 9 7 Q 8 5 3 NT → 94 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 137. A K Q 5 Q J 7 4 3 Q J 10 4 9 6 2 7 6 3 A K 10 9 8 5 K 10 8 A 10 9 8 2 6 2 8 6 5 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 170. A K Q 2 Q 8 6 9 3 K Q 6 3 8 5 A 2 K 10 7 6 5 4 J 10 8 10 9 6 J 10 9 7 3 A 8 2 5 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 488. 10 8 6 2 A Q 10 A K 9 Q 8 3 K 8 6 10 6 4 3 2 K J 6 5 4 A Q 9 5 J 9 7 3 2 8 7 5 10 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 564. K Q 8 2 A 7 K 9 8 K Q 10 8 A 9 2 A 10 7 6 4 3 2 6 5 4 10 6 5 Q J 10 9 8 6 3 5 J 3 3 NT → 114 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 588. K Q 10 8 Q 7 K 9 7 4 K Q 10 A A J 9 8 3 2 10 6 5 3 J 8 9 6 5 2 10 6 A 8 2 6 5 4 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 786. K Q 8 2 A Q 8 7 8 6 K J 6 A 10 9 3 A 10 7 5 3 2 Q 5 3 10 9 6 5 J 6 2 K 9 4 10 8 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 805. A Q 6 2 J 8 6 A 7 5 K J 10 K 9 A Q 9 7 3 2 10 8 4 2 8 10 8 5 10 K 9 6 3 Q 6 5 4 3 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 862. A K Q 6 Q 8 7 7 5 K Q J 8 8 5 A J K 10 9 8 4 2 10 5 3 10 9 2 10 9 6 3 2 A 6 3 6 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 994. A Q 9 6 A 8 2 K 10 5 3 Q 3 K 10 8 5 2 Q 9 7 9 K J 10 8 — J 10 6 3 A 8 7 6 4 2 6 5 4 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 1091. A K Q 8 Q 10 8 7 4 2 K Q 10 6 5 A 9 7 6 2 10 8 J 5 4 3 10 9 2 J 3 A K 9 6 5 3 8 6 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 1191. K Q 9 8 A J 10 9 6 4 K Q J A 10 5 2 8 6 3 K 10 7 10 8 4 6 Q 7 2 A 9 8 5 3 2 6 5 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 1223. K Q 10 9 A Q 10 3 10 4 K Q J 8 6 9 7 A 9 7 6 5 2 10 8 3 A 5 2 J 8 6 2 K 8 3 6 5 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 1285. K Q 10 8 A Q J 7 5 4 K J 10 A 9 5 2 9 8 6 2 A K 2 8 6 6 10 3 10 9 8 7 6 3 Q 5 4 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 1293. A K Q 9 Q J 2 K 4 2 6 5 4 10 8 2 A 10 9 8 7 6 A 10 9 7 — 6 5 3 8 6 5 3 K Q J 10 8 3 3 NT → 94 → 6 J 7 4 3 K 5 4 Q J A 9 7 2

 1309. A K Q 9 2 Q J 8 3 2 K J 6 10 6 5 10 9 6 3 2 A K 5 4 3 8 A 8 7 10 9 7 6 5 4 Q 10 8 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 1365. A Q 5 2 A Q 10 9 8 K 10 8 3 K 10 8 6 10 K 5 4 3 Q J 6 5 9 J 9 8 7 6 3 2 A 7 6 2 4 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 1399. A 9 8 6 Q 10 6 K 10 5 K Q J Q 2 A 8 A 7 6 10 8 6 5 4 3 K 10 5 J 9 7 3 2 9 8 4 3 2 — 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 1410. K 10 8 2 Q J 10 A 8 7 3 K Q 5 A 9 7 6 3 10 9 2 J 6 5 4 A Q 9 6 8 2 K 6 5 4 10 8 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 1489. A K 10 9 Q J A 6 3 Q J 10 8 6 A 10 9 8 7 6 7 4 2 K 6 5 Q 8 5 2 3 2 K 10 9 8 5 4 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 1562. A K 10 9 8 A J 7 7 4 3 K 6 Q 8 2 A K 10 9 8 5 2 J 5 4 6 5 2 Q 10 9 6 3 6 Q 10 8 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 1565. K Q 9 5 9 7 A K 10 2 K Q 6 10 6 A Q J 10 6 3 7 4 8 5 3 A 8 2 8 2 9 8 6 5 3 J 10 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 2296. K Q 10 8 J 7 3 A 9 5 K Q 8 A 6 5 9 K 8 3 2 J 10 6 4 3 9 2 A Q 10 8 6 2 10 7 6 4 5 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 2303. K Q 10 9 2 Q 3 2 K 6 4 K Q A A J 10 9 8 7 A 9 5 8 6 5 8 6 5 6 10 8 7 3 2 J 10 4 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 2687. A K Q 9 Q J 9 2 8 7 5 K Q 6 5 A 10 8 K 10 6 4 3 2 J 10 10 8 2 7 6 3 A 9 8 6 5 4 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 2769. K Q 10 5 A Q 8 8 4 K J 6 3 8 6 9 7 A K 10 9 3 2 Q 10 4 A 9 2 J 10 6 3 2 7 6 5 8 5 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 2806. K Q 10 2 Q 8 A 8 6 K Q 8 6 A 9 J K 10 9 7 5 2 J 10 5 4 8 6 5 A 10 9 7 6 3 2 4 3 3 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 3041. A Q 9 2 A 6 K 10 9 3 Q 5 3 K 10 Q 9 8 7 6 K J 10 8 6 4 8 6 5 J 10 3 2 A 8 7 5 4 2 — 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 3103. Q 9 8 5 J 3 A K 5 2 K Q J K A Q 8 7 6 10 3 8 6 5 4 3 A 10 6 2 10 9 2 9 8 7 6 4 10 3 NT → 94 → 7 J 7 4 3 K 5 4 Q J A 9 7 2

 3134. A K Q 2 Q J 2 A 6 2 J 6 5 8 A 10 9 8 3 9 8 5 3 Q 8 4 10 9 6 5 7 6 K 10 7 4 K 10 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 3443. A K 6 5 Q J 10 6 K 8 6 Q 8 9 2 A 10 9 7 5 4 3 K J 5 4 Q 10 8 9 8 7 3 2 A 2 10 6 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 3490. A 8 5 2 Q 9 7 A K 7 6 Q 5 — A 10 2 9 8 5 4 2 K J 8 6 4 K Q 10 9 6 J 8 6 3 10 3 10 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 3699. A K Q 6 5 Q J 9 9 6 3 K 8 9 A 10 8 2 A 4 Q J 6 5 4 3 10 8 2 7 6 3 K 10 8 7 5 2 10 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 4056. K Q 5 2 A J 10 2 6 3 2 K Q 10 9 8 9 8 3 A K J 10 8 5 4 A 6 Q 7 6 10 9 8 7 5 4 6 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 4059. K Q 9 2 A 3 2 K 8 4 K J 8 10 8 Q J 10 9 8 7 A 10 7 6 2 — A 6 5 6 9 5 3 Q 10 6 5 4 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 4110. A Q 9 5 9 7 2 A 8 K Q 10 5 K 2 A Q J 10 5 2 J 8 6 4 3 10 8 6 10 8 6 3 K 9 7 6 4 3 — 3 NT → 94 → 7 J 7 4 3 K 5 4 Q J A 9 7 2

 4487. Q 10 8 5 A J 8 K 8 3 2 K Q A K 9 6 2 9 7 6 2 10 J 10 8 — Q 10 3 A 9 7 6 5 4 6 5 4 3 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 4549. A K 9 5 9 3 K 8 4 3 K Q 3 Q 10 A Q J 10 8 7 7 5 J 6 5 8 6 2 6 2 A 10 9 6 2 10 8 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 4663. A K Q 10 2 Q 6 9 7 3 K Q 5 9 8 9 3 2 A K 10 6 5 2 J 4 6 5 A J 10 8 7 8 4 10 8 6 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 5318. A K Q 2 A 8 7 3 8 5 K J 4 10 8 Q J 10 9 6 2 A 4 Q 10 6 9 6 5 — K 10 9 7 6 3 2 8 5 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 5520. A K 8 2 A J 8 10 9 8 7 Q J 9 Q 10 7 6 3 2 5 4 3 K 10 3 Q 10 6 5 9 A K 6 2 8 6 5 4 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 5734. A K 10 6 2 Q 9 8 K 9 5 K 3 9 5 A J 10 7 3 2 A Q 10 6 5 Q 8 6 10 8 7 6 4 3 2 J 8 4 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 5848. A Q 10 5 Q 6 2 K 10 7 2 K J K 2 8 A 9 8 6 5 4 10 6 4 3 9 8 6 A J 10 9 7 3 3 Q 8 5 3 NT → 114 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 6026. K 9 8 6 A Q 7 K 5 3 K 10 5 A 10 J 10 8 6 3 2 A 8 2 8 6 Q 5 2 9 10 9 7 6 4 Q J 4 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 6058. K Q 8 6 A Q 10 10 8 K J 8 6 A 10 5 2 9 8 7 2 K 9 4 10 4 9 J 6 3 A 7 6 5 3 2 Q 5 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 6463. K Q 6 5 A J 10 7 6 K Q 4 3 10 8 7 6 K 10 8 4 3 2 8 6 5 A 9 2 Q 9 8 3 2 A 9 5 J 10 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 6947. K Q 6 5 Q 10 2 A 10 4 K Q 4 — A 9 7 6 8 7 6 5 J 10 8 5 3 A 10 9 8 2 J 8 3 K 9 3 2 6 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 7147. A K Q 6 8 6 3 A K 10 J 8 6 9 8 A J 8 7 6 K Q 10 5 4 3 10 5 2 Q 10 9 7 2 9 5 4 3 2 — 3 NT → 104 → 7 J 7 4 3 K 5 4 Q J A 9 7 2

 7296. A Q 10 2 A J 9 8 2 K J 10 4 K Q 7 2 A 10 7 6 5 4 3 8 6 9 8 6 5 10 8 6 3 K 9 Q 5 3 3 NT → 64 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 7310. A K Q 6 5 Q J 6 6 3 2 K 8 — A 10 9 7 A 10 8 7 5 4 J 6 5 10 9 8 2 8 3 2 K 9 Q 10 4 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 7538. A K 6 2 Q 3 K 8 4 2 K 8 5 — J 10 8 7 6 10 7 6 5 3 10 6 4 Q 10 9 8 5 A 9 2 A 9 Q J 3 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 8180. A K 10 8 2 Q J 3 K 7 5 Q 10 9 5 6 A 10 9 6 4 3 2 K J 5 Q 6 A 10 9 8 7 2 8 8 6 4 3 3 NT → 104 → 6 J 7 4 3 K 5 4 Q J A 9 7 2

 8192. K Q 9 6 2 A Q 9 6 4 3 K J 10 5 10 8 6 A K 10 9 5 2 8 5 A 8 J 7 3 2 8 7 Q 10 6 4 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 8193. A Q 10 8 A 9 7 5 3 K Q J 10 9 2 10 2 A K 10 8 6 4 2 8 4 K 6 5 Q J 8 7 6 3 9 6 5 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 8501. A 9 5 2 A Q 9 8 5 K Q 10 8 K Q 3 2 K 10 9 7 6 4 3 J 6 10 8 6 J 10 8 7 6 A 2 5 4 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 8883. A K Q 9 8 3 6 4 2 K Q J 3 10 10 9 7 A K 9 8 7 5 3 6 5 8 6 5 2 A Q J 6 2 10 10 8 4 3 NT → 54 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 8957. K Q 8 6 Q 10 7 3 K 4 2 K Q A 2 J 9 8 6 2 A 9 5 10 8 6 10 9 5 A 10 8 7 6 3 J 5 4 3 3 NT → 104 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 9324. K Q 9 2 6 2 A K 4 3 K 6 4 8 5 A Q J 10 8 3 10 6 2 8 5 A 10 6 9 7 9 8 7 5 Q J 10 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9344. K Q 10 8 Q 9 8 2 K 10 8 K Q 9 2 A J 10 6 3 A 9 6 J 4 3 A 6 5 7 7 5 4 3 2 10 8 6 5 3 NT → 94 → 8 J 7 4 3 K 5 4 Q J A 9 7 2

 9892. A K Q 9 Q 7 6 3 2 K Q 8 3 8 6 10 2 A 9 8 7 5 4 J 6 5 10 5 2 A J 9 8 6 3 K 10 10 4 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9896. A Q 10 5 9 6 A 8 5 3 K Q 8 8 2 A Q J 10 7 2 K 10 4 6 4 K 9 6 8 3 9 7 6 2 J 10 5 3 3 NT → 64 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 9981. K Q 9 6 5 A 10 K 9 4 K 8 6 A 8 2 Q 8 6 10 8 6 3 Q 10 3 10 J 9 7 3 2 A 7 5 2 J 5 4 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9982. A K 5 2 A 10 K 7 3 2 Q 5 3 Q 9 8 6 Q J 6 3 2 5 J 10 6 10 9 8 7 A 10 9 8 6 4 K 8 4 3 NT → 84 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 9983. K Q 10 5 A 10 K 10 8 Q J 8 3 A 2 Q J 9 7 3 7 3 K 10 5 4 9 8 6 8 6 2 A 9 6 5 4 2 6 3 NT → 84 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 9984. K Q 10 6 A Q 9 3 A 10 3 Q 5 A 5 J 8 7 6 K 8 5 2 K J 8 9 8 2 10 2 9 7 6 4 10 6 4 3 3 NT → 114 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 9985. A Q 8 6 A Q 7 7 6 2 K J 8 K 5 10 9 6 A K 10 8 3 Q 6 3 10 9 2 J 8 3 2 9 5 4 10 5 4 3 NT → 84 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 9986. A K 8 6 5 A J 2 K 2 J 6 5 Q 10 10 8 7 6 9 8 6 5 3 4 3 9 2 Q 9 3 A 10 7 4 K Q 10 8 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9987. K Q 8 5 6 2 A K 7 4 K 6 5 9 6 2 A J 10 9 8 5 2 Q 10 3 A 10 Q 9 8 7 3 10 6 3 J 8 4 3 NT → 74 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9988. A K Q 8 6 J 9 K 5 3 K 6 5 9 2 Q 10 3 9 7 6 4 Q 10 8 4 10 5 A 8 7 6 2 A 10 8 2 J 3 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9989. A Q 8 6 A Q 8 7 6 K 10 8 6 K 9 2 10 9 7 6 9 5 4 3 2 Q 10 5 J 3 2 A K 10 8 J 5 4 3 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9990. A 8 6 5 A Q 10 3 5 4 K Q 3 K 10 9 9 6 K 7 6 3 2 10 8 6 Q 2 J 8 7 2 A 10 9 8 J 5 4 3 NT → 84 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV

 9991. A Q 9 6 A Q 6 3 K 6 Q 10 4 8 5 2 10 10 8 7 4 3 2 K J 8 K 10 J 9 8 7 2 A 9 5 6 5 3 3 NT → 74 → 9 J 7 4 3 K 5 4 Q J A 9 7 2

 9992. A K 9 5 2 A 10 9 10 4 2 K Q Q 8 6 8 7 3 2 A 9 7 5 J 5 10 Q J 6 K 8 6 3 10 8 6 4 3 3 NT → 114 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 9993. A 10 9 6 A 9 7 A K 9 6 J 4 K Q 8 10 2 7 3 2 K 10 8 6 3 5 2 Q J 8 6 3 10 8 5 4 Q 5 3 NT → 104 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 9994. A Q 9 6 A 7 6 3 6 4 3 K Q 5 2 Q 9 A K 10 5 2 8 6 4 3 K 10 8 J 10 8 2 9 8 7 J 10 5 3 NT → 74 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9995. K Q 6 5 A 10 A 10 9 4 Q 4 3 9 8 J 9 6 3 K 3 2 J 10 8 5 A 10 2 Q 8 7 2 8 7 6 5 K 6 3 NT → 104 → 11 J 7 4 3 K 5 4 Q J A 9 7 2

 9996. A K 10 2 J 10 7 6 A 7 4 K 5 Q 9 6 5 A 9 8 2 K 10 8 J 4 8 Q 3 9 6 5 3 2 Q 10 8 6 3 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9997. A K Q 10 A J 9 10 5 K 10 8 5 9 8 Q 10 8 A 9 7 3 Q J 4 3 6 5 2 7 6 3 2 K 8 6 4 2 6 3 NT → 84 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9998. Q 8 5 2 A Q A 10 8 4 Q J 5 A 10 6 J 10 9 8 9 7 6 5 8 3 K 9 7 6 3 2 K 3 2 K 10 6 4 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 9999. A K Q 6 J 8 7 A K 5 4 8 5 9 8 2 A 9 2 10 8 K Q 10 6 3 10 5 Q 10 6 3 9 7 6 3 2 J 4 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 10000. K 10 6 5 A 10 7 6 A 5 3 K J A Q J 9 8 2 K 10 7 6 8 5 4 Q 9 8 2 3 9 8 4 2 Q 10 6 3 3 NT → 94 → 10 J 7 4 3 K 5 4 Q J A 9 7 2

 Simulation 8Z21 Main Top Stayman or Not IV