kfitz

Opening or rebidding in Nt partner will be able to judge the limits of the contract very well as your range is so narrowly defined. that is a huge upside, and I am sceptical that the downside, that small subset of hands where 1nt fails but 2M would squeak home on a 5/3 fit. comes near to compensating, there are other pluses too to opening 1nt with a 5 card major, if the opening leader against nt doesn't have a long major themselves , they are likely to try and hit partners long majorl... which turns out to be yours... having said that, 17 with any 5 card suit is usually too good for a 15=17 nt but quite good enough for a 2nt rebid.. In first and second seat you will likely show a profit by optimistically upgrading close decisions to open 1nt or 2nt.. In 3rd or 4th you shouldnt' be upgrading too generously. Why? pd is limited to 11 points or less, the last thing you want is to provoke an invite to 3nt or 6nt .... that you will decline...

If you won’t reopen in spots like this you force pd to put their vuln neck on the chopping block with all kinds of hands that will prove disastrous when rho proves to have many of the high cards you have here

This seems absolutely clear to me , you are max for your initial pass and there are so many hands pd would have to pass which you must now protect, every hand with only one major and no 6+ suit in fact

yes kfitz , 5.... , 6..... ok