Burnham Bridge Club
Competitive Bidding at Pairs
13
Example 2:  The Actual Traveller
42
0
1
-140
40
2
1
-110
37
5
2
-100
32
10
3
+50
27
15
2
+100
22
20
3
+110
12
30
7
+140
2
40
3
+300
EW MP
NS MP
Frequency
NS Score
10 tricks make in spades because East had ♠A.

Bidding 4♠ would have improved the score of 33/42 to 40/42 if there are 10 tricks available, but turns 33/42 to around 4/42 when there are only 9 tricks.