Game-forcing 2♣♦

Unpassed 2/1 is 100% game-forcing. Opener defaults to rebid 2♥. Opener’s reverses promise extra strength.

1♥-2♣-NAT FG
2♦4+♦
2♥MIN
2♠MAX, 4+♠
2NTBAL MAX
3♣MAX, 4+♣
3♦MAX, 5+♦
3♥MAX, 6+♥
3♠!MIN SPL, 0–1♠, 4+♣
3NTMIN, 3532
1♥-2♦-NAT FG
2♥MIN
2♠MAX, 4+♠
2NTBAL MAX
3♣MAX, 4+♣
3♦MAX, 4+♦
3♥MAX, 6+♥
3♠!MIN SPL, 0–1♠, 4+♦
3NTMIN, 3523