The negative double.. Is it natural bid or part of conventions ?? Playing a hand against a pair with yellow stars (on first table) , I experienced the following: My partner oppened 1H, my right opp bade 2d.. I held 5 diamonds with kj and 10 points. I doubled and all pass. hand was very bad (500-800 cannot remember) for opponents. opp X called TD ( discussion was screened from my P and me). After a while TD asked me why i did not ALERT my X. I was stunned. My answer is that I never alert perfectly natural bids, moreover nobody asked me what my double means during the bidding. result is not important.. TD adjusted for something and as crown of all i was discarded from TU as criminal. The question is obvious Is the penalty double natural bid or not ?? personaly (after 40 years of bridge playing, including international tournaments), that nonalerted double must be considered penalty (after opps overcall), because if opposite, 2/3 of Bridge History must be erased all rules rewriten. moreover alerting penalty double "striptize" doubler's hand which is illegal info for opps. and so one.. One thing more.. very often.. after second or third round of bidding, one of players asks for first or second bid explanation ... That is impossible in "live " bridge TU's.. and often provokes the whole constructive bidding around the table.. players have invented the row of artificial answers too.. to be legal and give nothing.. My sugestion is ( I am not alone for sure) that asking should be obtained before next bid.. AS WELL.. as UNDO requesting. radmilo savic