1N! 2C!
2D! BAL, w/o 5M6m
2M 5M (2N/3M=inv, 3m=S/O)
2N! other cases (3m=S/O)
3m 6m
1N! 2C!
2D! ps weak D
2H 4-5H or 44M, inv
2S 4-5S, inv
2N inv
3C weak C
3D! 5S + 4H, inv
3H! 5S + 5H, inv
1N! 2C! 1N! 2C!
2D! 2H 2D! 2S
ps 3H, min ps 3S, min
2S 4S, w/o 4H 3C! 4H, w/o 4S, not min
2N/3m/3M inv 3D/3M inv
2N w/o 3H, min 2N w/o 3S, min
3C! 受邀, w/o 4S3H 3D! 受邀, w/o 4H3S
3D! 受邀, 3H 3H! 受邀, 3S
3H 受邀, 4+H 3S 受邀, 4+S
3S+ 4+H fit, control 4C+ 4+S fit, control
3N S/O 3N S/O