If it helps (and this is a blog about mishaps after all), at the table I reasoned that I had reasonable defense against 5H (if partner has 4 spades and 6 points) passed. The full hand was:
5H was lay-down although a couple of declarers managed to go down by tackling clubs before pulling trumps.
Score for reasonable actions:
- Pass and 5H makes = lose 5 imps
- Double and 5H makes = lose 8 imps
- Bid 5S and make it = gain 10 imps
- Bid 5S and get diamonds wrong = gain 3 imps
It is still a bidder's game.