Mohan

dbl over weak 1NT shows 15+ HCP, penalty oriented, other bids Multi Landy

after (1NT) - dbl -

3rd hand Passes or Redoubles    ➲   

3rd hand bids 2x naturally or  artificially and promises length in the suit bid and could be passed    ➲

3rd hand bids 2x artificially and does not promise length in the suit bid    ➲

Same as above after (1NT) - pass - (pass) - dbl -

after (1NT) - pass - (bid) - dbl -    ➲