Hard match with special 4123 after 4 hours today

[Tales Kuo]

When you say, 3n and 2w, or 2dmc(w), What does it mean ?

N-Narrow
exp:
4-2MC-3N(AM)-1

------ST------

AMC-AMC-AMC

---MC--MC---

DL-DC--DC-DR

W-Wide
exp:
4-2MC-3W(AM)-1

------ST------

AML-AMC-AMR

---MC--MC---

DL-DC--DC-DR