Bridge

1♠

bid
1♠
1♠
promises
  • 13+ HCP
  • 5+ spades
  • spades ≥ hearts (open 1♠ with 5-5 majors)
conditions
13+ HCP, S:5+, S≥H
why

With 5-5 in the majors, always open 1♠ first — you can rebid hearts cheaply at the 2-level but not spades, so show the more expensive suit first.

what happens next

Partner raises with 3+ spades, bids 1NT without a fit, or makes a 2-level new-suit response with 10+.