1§-1¨-1©-1ª = forcing not necessarily to game
1§-1¨-1©-2ª = values for 2NT with no ª stopper
Other 4th suit auctions forcing to game
1¨ -1© -1ª -3§ = to play weak 4-6
1§ -1©-1ª -3¨ = to play weak 4-6
2 special 4th suit auctions
1© - 1ª - 2§ - 2¨ = puppet to 2© thus1© - 1ª - 2§ - 2© = 4th suit game forcing
1¨ - 1© - 1ª - 2§ = puppet to 2¨ thus 1¨ - 1© - 1ª - 2¨= 4th suit game forcing
POLOWAN
1§-1¨-1©-1ª =
1§-1¨-1©-2ª =