Apa Beda SAYC dengan Standar 2/1?

 

Standard American Yelow Card (SAYC)

1C/D Natural, 6+ HCP bisa 3 kartu, "bid up the line" Strong Jump Shift
1NT = 6-10, 2NT = 13-15, 3NT=16-18

1H/S 1NT = non forcing 2NT = 4-card raise forcing, opener jawab pendek di level 3, 5-card di level 4. 3H/S = Limit Raise 3NT = 15-17 Strong Jump Shift

2C Strong, Artificial 2D = Waiting

 

Two Over One Game Force (2/1)

1C/D Natural, 6+ bisa 3 kartu, bid up the line (bypass D, utamakan major), Inverted Minor Raise. Weak Jump Shift
1NT = 6-9, 2NT = 10-12, 3NT=13-15

1H/S 1NT = Forcing
2NT = 4-card raise forcing
Bergen Raise, Splinter, 3NT= 15-17
Weak Jump Shift, Reverse Drury

2C (Strong, Artificial) 2D = Waiting, 2H = Negative

Pada pembukaan 1C/D yang menonjol adalah yang satu weak jump shift sedangkan yang lain strong jump shift. Kemudian inverted minor raise yang tidak digunakan pada SAYC tapi dipakai pada 2/1.