INTRODUCTION	SHAPE	SEQUENCES			Slam	Defence	Miscellaneous
REGRESsion home	Diviation scheme	Basic scheme			End signal	interference	conventioncard	Search
Weak Opening System by Marcel den Broeder	complete schemes:	Openings 1/2nd pos.:			Sl '-S'-Tab	Suggested defence for opponents	Nomenclature	Notation
	Balanced	Pass	1	1	Spiral Sc.		WOS links	playing on line
	Singl./void Delta	1-2	2	2/3	Exclusion	our overcall	literature / ©	downloads
	Singl./void Extreme			tools	others	hum overcall	bid examples	interactive

WOS

Weak Opening System. There are several types, with different meanings for Pass and opening bids. For REGRESsion, the Pass = 13+, and all other openings are weak

OPENING
If this is your first acquaintance with a WOS with a Pass =13+, you can be confused by the word "opening". When you follow next line of thought :
-	do not say Pass = an opening. Pass is simply: 13+ and a "non-descriptive" bid
-	if a bid describes a certain pointrange + shape sort then it is an opening
-	a bid in both seats means the same, because of the symmetry, but, 3rd/4th seat openings are always after a Pass 13+, so there is a difference in pointranges only.
in this way the openings keep their unique meaning and you know immediately that f.e.
-	an 1 opening in 1/2 seat = 0-7 and an 1 opening in 3/4 seat = 0-5 (you also can say : an 1 opening after Pass instead of in 3rd/4th seat) and f.e. in [Pass] - 1 is 1 an 1 opening after Pass = 6-11 short in (shortage openings have the preference in first opening calls)
-	treat the 1 in 3rd/4th seat as a kind of Pass (because of the 12+ variant), so not to be mentioned as opening, lateron you can tell your opening, or you will hear the opening from your partner. f.e. in [Pass] - [1] - 1 is 1 an 1 opening = 13-16 short in
-	treat in the start sequences [1] from the [Pass] hand as a "non-descriptive" bid too f.e. in [Pass] - [1] - [1] -1 is 1 an indirect 1 opening after Pass = 6-11 balanced with whilst an 1 opening in 1st/2nd seat = 8-12 balanced with
I hope it will be clear to you. Above is a rough simplification but all will be fully explained in the basic sequences.

Doubleton versus Singleton
Balanced	at least in each suit a doubleton
Shortness	singleton or void . S-opening opening with s/v
Delta	S-openings with 4441 up to 7300 distribution + you know the s/v suit
Extreme	in fact S-openings, but you do not know exactly the s/v suit(s), known is suit x min. or suit y and then max.
Deltex	additional refinement of Delta and Extreme, that means the 1 suiter 8-12 carders from Extreme shapes inserted in the Delta scheme.

minimum, weak, fine.....
poor	bad suit quality, òr in case of a 4333,4432 the total hand
good	working points in suit (2 of 3 Tophon.òr if you wish 3 of 5), or in case of a 4333,4432 the total hand
closed	= solid, officially AKQJxxx, but AKQxxxx is fine
minimum	points; but f.e. in the 8-12 range a QJxx QJxx KQxx x = a minimum although a maximum in points
maximum	points; same 11 points f.e. QJxx KJxx KJxx x
in case a minimum has a larger pointrange as 2 points: max|min = maximum points for your minimum pointrange

Hand pattern
shape	general so it is Balanced, Delta or Extreme
shape sort	which one of above three,
distribution type	4333/4432, 5332/5422 etc.
distribution	your hand pattern f.e. 5332, 5332, 5332 and finally:
exact distribution	how many cards in each suit, graphically by ‹‹ 3253 ›› (in suit order)
numerical	treat the exact distribution as a number

Relay
As explained in the introduction:
R	Relayer, the hand that is relaying
RR	Responder to Relays, the hand that is responding to relays

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for abbreviations etc.: see notation