| 1. | In understandings regarding negative doubles, the emphasis is on major suit lengths.
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| 2. | CoCa renders all unbalanced hands with a major suit biddable.
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| 3. | The opening bid of one diamond alternatively denies interest in a major suit.
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| 4. | If no major suit exists, the partnership can play in the opener's longest suit.
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| 5. | As a result, the 1NT overcall over a major suit needs to be stronger.
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| 6. | With a tolerance of the major suit, Advancer passes.
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| 7. | It is one of two major suits remaining against the state and the event organizers.
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| 8. | With a tolerance of the major suit, Partner passes.
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| 9. | This has the advantage that the 4 becomes available to ask for the major suit.
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| 10. | Doubler's partner may also bid 2 to ask the doubler to bid his major suit.
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