1M CS Openings

8-11 in Mode 0. 4+M unbal or 5+M. May have a longer Minor

With equal length in majors, open the better major.

1♥ Cornerstone

• 1♠
  F1. No slam

  • 1N
    5=♥. no 3+♠ or 5+m. Natural Continuation
  • 2m
    5+m (2♣ can be =1444)
  • 2♥
    6+♥ or good 5=♥
  • 2♠
    3+♠

    • 2N
      4=♠ Inv
    • 3m/♥
      5+♠ Help suit inv
    • 3♠
      Blocking
  • 2N
    6+♥ 3=♠ Max
  • 3X
    Nat Max
• 1N
  NF. Can hide 4=♠ if bal

  • P
    To play. 4441, 5332, 5M4xx
  • 2m
    5+m

    • 2oM
      Fit m, fragment raise in oM
    • 2M
      Fit m, fragment raise in om
    • om
      Nat Inv
    • 2N
      Nat Inv
    • 3m
      Courtesy raise
  • 2♥
    6+♥ or good 5=♥
  • 2♠
    5+♥ 5+♠ Max
  • 2N
    6+♥ 5=m. Then minors are P/C
  • 3m
    5+♥ 6+X
  • 3♥
    6+♥ Max
• 2♣
  Art. GF. Relay
• 2♦
  Art. 3+♥ Inv to game value. Spiral raise
• 2♥
  Wide range raise. Spiral raise
• 2♠/3m
  6+ suit. inv
• 2N
  Nat misfit inv. Continuation
• 3♥
  Preempt. (4)5+♥
• 3♠/4m
  Fragment raise
• 3N
  3=M COG
• 4M
  To play

1♠ Cornerstone

• 1N
  NF.
• 2♣
  Art. GF. Relay
• 2♦
  Art. 5+♥ F1. Either 6+♥ constructive (no 3=♠) or 5=♥ inv+. No slam

  • 2♥
    2-♥ Catch all.

    • P
      6+♥. To play
    • 2♠/N/3X
      Nat inv
  • 2♠/2N/3N
    6+♠ 1-♥/2=♥/3=♥. Max
  • 3m
    4=♠ 2=♥ 5+m Max
  • 3♥
    ♥ fit. Min
  • 3♠
    Good 6+♠ Max
  • 4m
    Fit ♥ Splinter
  • 4♥
    To play
• 2♥
  Art. 3+♠ Inv to game value. Spiral raise
• 2♠
  Wide range raise. Spiral raise
• 2N
  Nat misfit inv. Continuation
• 3m
  6+ suit. inv
• 3♥/4m
  Fragment raise
• 3♠
  Preempt. (4)5+♠
• 3N
  3=♠ COG
• 4M
  To play

1M - 2N

• 3♣
  Either 5+♣ GF, or 6+M GF

  • 3♦
    Ask

    • 3♥
      6+M GF. May have 4oM. 3♠ shows 4oM
    • 3♠/N
      5+♣ GF. Hi / lo short
• 3♦
  5+♦ GF. 3♥ ask short (hi / lo)
• 3M
  6+M NF
• 3oM
  5=M 4+oM. After 1♠, 3♠ shows 3=♥ (Find 5-3 ♥ fit)
• 3N
  To play
• 4m
  5M 6+m
• 4M
  To play

1M Contested Auction

1M (Dbl)

• P
  Non descriptive. Later Dbl is competitive
• Rdbl
  Our board. Interested in penalizing opponents. Forcing to 2M
• 1N
  Art. 3=M support. =Inv

  • P
    To play
  • 2 any
    NF
  • 3 any
    GF
• 2M
  3+M support. Wide range. Less than invite. Spiral Raise
• Suit
  Expected to be competitive, but can be weaker. NF
• 2N
  4+M. Limit raise+. Only 3M is NF
• JS
  Preemptive

1M (Suit bid)

• Dbl
  (up to 3♦) Negative. Asks partner for unbid 4-card major or the longest suit

  • 2N
    5+5+ in M and lowest unbid suit. Non-min
  • Cue
    5+5+ in M and highest unbid suit. Non-min
  • JS
    usually 6+. Non-min
• Dbl
  (from 3♥) Optional
• NS
  NF
• JS
  GF
• Raise
  Wide range
• 3M
  Pre
• 4M
  To play. Either way
• Cue
  Inv+ 4+ support
• 2N
  Bal inv

1M (1N)

• P
  Non-descriptive
• Dbl
  Optional. Correctable on offensive hands
• 2m
  Competitive. NF
• 2M
  Wide range. Spiral raise
• 2N
  4+ support. Only 3M is NF
• 3X
  Preemptive

1M (Michale / U2NT)

• Dbl
  Optional
• Cue low
  GF 5+ in 4th suit
• Cue high
  Fit M. Inv+
• 3M
  Competitive
• 4th suit
  Constructive NF

Modified Drury

Used in Mode 3

P - 1M

• 2♣
  8-10 Bal 2=M

  • P/2m/2M
    To play
  • 2oM/2N
    Nat inv
  • 3m
    Canape. GF
  • 3oM
    Nat GF
  • 3M
    6+M Inv
  • 3N/4M
    To play
• 2♦
  8-10 Bal 3-4M

  • 2M
    To play
  • 2oM/2N
    Inv
  • 3m
    Canape GF
  • 3M
    Art. Choice of 3N / 4M
  • 3N/4M
    To play. Not correctable