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Point difference IMPs 0 - 10 0 20 - 40 1 50 - 80 2 90 - 120 3 130 - 160 4 170 - 210 5 220 - 260 6 270 - 310 7 320 - 360 8 370 - 420 9 430 - 490 10 500 - 590 11 600 - 740 12 750 - 890 13 900 - 1090 14 1100 - 1290 15 1300 - 1490 16 1500 - 1740 17 1750 - 1990 18 2000 - 2240 19 2250 - 2490 20 2500 - 2990 21 3000 - 3490 22 3500 - 3990 23 4000 or more 24
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imp table
#1
- Csaba the Hutt
-
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Posted 2010-January-19, 20:35
#2
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- Joined: 2009-February-15
Posted 2010-January-20, 05:13
Strongly agree.
and the result can be plotted on a graph.
#3
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Posted 2010-January-20, 17:39
Agree with IMP table. Perhaps this is a reasonable place to put a few general comments about these crazy hands. My observations:
(1) There is sometimes a decision whether to balance after 1♠-P-2♠-P-P. I've assumed that in deference to the vulnerability, we pass it out. This seems most consistent with the initial decision to pass, but obviously is a whole other bidding problem to consider.
(2) There is sometimes a decision for west whether to pass after 1♠-P. I have taken the approach of responding with almost all hands, as I think it is rarely right to pass partner's opening at these colors. This lead to "stealing" some games from N/S for big wins, but also lead to getting too high when opener had extras for moderate undoubled losses sometimes. Whether this tactic is "right" might be an interesting thing to try to figure out, but it's how I usually bid at white/red.
(3) In many cases the auction depends on the E/W methods. I have assumed that they play direct jumps as natural invites, 1♠-P-3♠ as limit raise, 1♠-interference-3♠ as mixed raise, 1NT forcing, but wide-ranging single raises (not "constructive raises"). I have also assumed that they do not play transfers after 1♠-X. I've assumed that 1♠-2♥-3♣ is forcing to game, but that west would still make that call on some 10-counts with seven-card club suits (which I think is clear to do). In any case, if you assume different E/W methods the results will be a bit different.
(4) I found it interesting that several "club invite" hands actually came up for west. There was at least one case where standard american bidding would reach a good game that 2/1 misses in an unobstructed auction, because of the ability to bid 1♠-2♣-2♥-2♠ showing an invite with a spade doubleton honor, whereas the 2/1 auction would be 1♠-3♣ INV and opener would not bid on (and the 6-2 spade fit would be missed).
(1) There is sometimes a decision whether to balance after 1♠-P-2♠-P-P. I've assumed that in deference to the vulnerability, we pass it out. This seems most consistent with the initial decision to pass, but obviously is a whole other bidding problem to consider.
(2) There is sometimes a decision for west whether to pass after 1♠-P. I have taken the approach of responding with almost all hands, as I think it is rarely right to pass partner's opening at these colors. This lead to "stealing" some games from N/S for big wins, but also lead to getting too high when opener had extras for moderate undoubled losses sometimes. Whether this tactic is "right" might be an interesting thing to try to figure out, but it's how I usually bid at white/red.
(3) In many cases the auction depends on the E/W methods. I have assumed that they play direct jumps as natural invites, 1♠-P-3♠ as limit raise, 1♠-interference-3♠ as mixed raise, 1NT forcing, but wide-ranging single raises (not "constructive raises"). I have also assumed that they do not play transfers after 1♠-X. I've assumed that 1♠-2♥-3♣ is forcing to game, but that west would still make that call on some 10-counts with seven-card club suits (which I think is clear to do). In any case, if you assume different E/W methods the results will be a bit different.
(4) I found it interesting that several "club invite" hands actually came up for west. There was at least one case where standard american bidding would reach a good game that 2/1 misses in an unobstructed auction, because of the ability to bid 1♠-2♣-2♥-2♠ showing an invite with a spade doubleton honor, whereas the 2/1 auction would be 1♠-3♣ INV and opener would not bid on (and the 6-2 spade fit would be missed).
Adam W. Meyerson
a.k.a. Appeal Without Merit
a.k.a. Appeal Without Merit
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