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Natural 1♦-1M

The responses 1♦-1♥♠ show 4+ cards just like any 5-card major system. Responder has 6+ points most of the time, but sometimes responder bids with a freaky hand, especially with a long major suit and short diamonds.

1♦-1♥4+♥
1♠11–17, 4+♠, 5+♦
1NTBAL 12–14, 5=♦
2♣11–17, 4+♣, 5+♦
2♦11–17, 6+♦
2♥11–14, 4+♥
2♠!ART REV, 15–17, 6+♦, 3=♥
2NT18–20, 0–2♥
3♣15–17, 5+♣
3♦15–17, 6+♦, 0–2♥
3♥INV, 15–17, 4+♥
3♠!FG, 18–20, 3=♥
3NTSOL 7+♦, partial stops in ♠ and ♣
1♦-1♠4+♠
1NTBAL 12–14, 5=♦
2♣UNBAL 11–17, 3+♣
2♦11–17, 6+♦
2♥!REV, 15–17, 4+♥ or 6+♦ 3=♠
2♠11–14, 4+♠ or 3451
2NT18–20, 0–2♠
3♣15–17, 5+♣
3♦15–17, 6+♦, 0–2♠
3♥!FG, 18–20, 3=♠
3♠INV, 15–17, 4+♠
3NTSOL 7+♦, partial stops in ♥ and ♣

Reverses and Lebensohl

For a precise game try, we sacrifice 2NT as Lebensohl to park minimum hands.

1♦-1♥ 2♠-INV, 3=♥, 6+♦
2NT!LEB, MIN
3♣!“4SFG”, ask for 3=♠ or stopper
3♦FG, 2+♦
3♥FG, 6+♥
3♠FG, 6+♠
1♦-1♠ 2♥-INV, 4+♥ or 3=♠ 6+♦
2♠NF, 5+♠
2NT!LEB, MIN
2NT 3♣!4+♥
2NT 3♦6+♦, 3=♠
3♣!4SFG
3♣ 3♦6+♦, 3=♠
3♣ 3♥4+♥
3♦FG, 3+♦
3♥FG, 4+♥
3♠FG, 6+♠