This opening shows a weak hand with diamond length. The requirements vary with position and vulnerability, from "wild and woolly" to "classical". Not vulnerable, five-card suits are frequent and side four-card majors are permitted. Vulnerable, six-card suits are expected and side four-card majors are forbidden.
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2H/2S |
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Constructive, but NF, showing 13-18 points. Opener passes with tolerance, and otherwise bids naturally with 2NT showing a maximum with doubleton support. |
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2NT |
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Relay, 19+points or 17+ with 6+C |
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3C |
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Any minimum, or maximum with 0-1C |
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3D |
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Maximum, no four-card major, no singleton or void |
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3H |
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Maximum, 0-2H 2+S 2+C (now 3S checks for a 4-4 spade fit) |
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3S |
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Maximum, 4-5H 0-2S 2+C |
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3NT |
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Maximum, 0-1H 2-3S 2+C |
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This doesn't work. There is no bid for 4261, 2461, 3361, and duplication auctions for 2164, 3163. |
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3C |
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INV raise, 3+D (like a strong notrump) |
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3D |
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Not INV, 3+D |
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3H/3S |
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? |
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4D |
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Not INV, 4+D |
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NaN |
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To play |
This opening shows a weak hand with spade length. The requirements vary with position and vulnerability, from "wild and woolly" to "classical". Not vulnerable, five-card suits are frequent. Vulnerable, six-card suits are expected.