New Minor Forcing (one way NMF) occurs in sequence: 1X–1M-1NT–? and guarantees 11+ HCP.

1♣–1M–1NT–? 

• 2♣ - retrive, 4+♣, 6-10 HCP;

• 2♦ - artificial, 11+ HCP, forcing;

• 2M - 6+M, 6-11 HCP;

• 2N - 4=M, 11-13 HCP;

• 3♦ - 4=M and 6+♦, 6-10 HCP,

1♦–1M–1NT–?

• 2♣ - artificial, 11+ HCP, forcing;

• 2♦ - retrive, 2+♦, 6-10 HCP;

• 2M - 6+M, 6-11 HCP;

• 2N - 4=M, 11-13 HCP;

• 3♣ - 4=M and 6+♣, 6-10 HCP,

1♥–1♠–1NT–?

• • • 2♣ - artificial, 11+ HCP, better minor, forcing;

    • 2♦ - artificial, 11+ HCP, better minor, forcing;

    • 2♠ - 6+♠, 6-11 HCP;

    • 2N - 4=M, 11-13 HCP;

    • 3m - 4=M and 6+m, 6-10 HCP,

Opener’s priority list after 1m–1♥/1♠–1NT-2♦-?:

• show 4-cards in the other major;

• show 3-card support for responder’s suit;

• show 5-cards in a minor;

• notrump shows nothing else to say.

New Minor Forcing can also be used when opener rebids 2NT:

1♣–1M–2NT–?

1♥–1♠–2NT–?

Now Responder needs only 8 plus HCP.

New Minor Forcing is OFF if the opponents overcalled and the option "NMF by passed hand" is off, but on if they only doubled on the 1st round. 

Compare to similar conventions.