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So first question is whether to immediately support spades (I assume via a ♦ splinter), or instead to bid the 2♥ I chose. My thought was it's better to show the hearts now - if I splinter the hearts will never come up at all. I figured it's not going to be hard to support spades on my next bid.
As it happened, West intervened, partner supported my hearts, and I couldn't figure a way to find out if we were off two clubs or not, and so I simply chickened out. GIB seemed to think any further spade bid was a cue bid, and so I reckoned we were stuck in hearts rather than spades.
Any thoughts on how to approach hands like these? Both when bidding with GIB and also with a competent (but not expert) partner.