In an individual competition everybody plays the same system all the time (even if you happen to play with your regular partner(s)).Therefore no announcing or alerting is necessary.
Opening 1NT = 12 to 14 points
In response to 1NT
2§response to 1NT is Stayman
2¨/©/ª = weak take out, ordering partner to pass 3©/ª = 5-card suit and points for game
2NT = 11 or 12 HCP, balanced
3§/¨ = strong and unbalanced with long suit.
Defence to 1NT. Natural. Double is for penalties.
If the opposition double our 1NT, 2§ is not Stayman but is natural.
1NT overcall = 16-18 points with stopper(s) in opponent’s suit.
Responses as if partner had opened 1NT with points adjusted
Opening 2 bids.
2§ = strongest bid - game forcing (except 2§ - 2¨ - 2NT). 2¨ response = negative, <8 points.
2¨/©/ª = strong (8 playing tricks), forcing for one round. 2NT response = negative, <8 pts.
2NT = 20-22 HCP, balanced. Responses. 3§ = Stayman. 3¨/©/ª = natural and forcing.
Defenceto pre-empts. Double = take-out.
Doubles of suit bids by the opposition up to 4¨are for take-out except after a penalty double by partner or if we have agreed a suit.
Jump overcalls are intermediate (6+ card suit, about 11 to 15 points)
Blackwood- 4NT asking for aces, then 5NT for kings
Gerber (4§for aces, 5§for kings) only immediately after an opening 1NT or 2NT
Cue bids, showing a control after suit is agreed,are permitted.
4th suit forcing: If we have bid three suits naturally, a bid of the fourth suit is artificial and shows a good hand in the context of the bidding so far and orders partner to bid again. A NT bid then shows stopper(s) in the 4th suit.
NO OTHER CONVENTIONS ARE ALLOWED
Top of honour sequence, 4th highest from long broken suit headed by an honour(s), second highest from a poor suit.
Signals and Discards.
On partner's lead: high to encourage, low to discourage.
When discarding: high to encourage, low to discourage (only 1st discard is significant).
On declarer's lead: low followed by high = odd number of cards in suit, high followed by low = even number of cards in the suit.