Thank you for all the replies, including off-topics :) aguahombre, so far teaching that student not to open NT even with 5-card Major. I think it's better for players without experience, isn't it? mycroft, sorry I am new to this forum, would like to know what is "MI"? Actually, player calling director was a certified ACBL director (that is a different topic probably) HighLow21, and noone canceled Beginner's Luck, right? Hope, there are more things happening at the bridge table which increase your life expectancy :) olegru, my students mix up Hearts and Diamonds all the time. Now I'll be prepared to situations like yours ))