how to beat 4-3n-1-2 ? help please.

[Buster Keaton]

A 4-5-1 V Style formation can take advantage of the flanks of the diamond with an AML and AMR as well as defend against the AMC by using a DMC.

4-5-1 V Style:

———ST——–
AML———AMR
—–MC–MC—
——DMC—–
DL-DC-DC-DR

Another variation on countering the narrow diamond would be by using the 4-3-2-1:

4-3-2-1

———ST——-
AML———AMR
—MC-MC-MC—
–DL-DC-DC-DR–

Although there is no DMC with the 4-3-2-1 it is still a very effective attacking formation to counter the Diamond with, mainly because of the strong middle as well as having attacking flanks.
If during the match you feel the AMC is taking advantage, then a simple (DOWN) arrow would be placed on the middle MC which in turn effectively would be turning this formation into a 4-5-1 V Style.

[Kleosfc]

A 4-5-1 V Style formation can take advantage of the flanks of the diamond with an AML and AMR as well as defend against the AMC by using a DMC.

4-5-1 V Style:

———ST——–
AML———AMR
—–MC–MC—
——DMC—–
DL-DC-DC-DR

Another variation on countering the narrow diamond would be by using the 4-3-2-1:

4-3-2-1

———ST——-
AML———AMR
—MC-MC-MC—
–DL-DC-DC-DR–

Although there is no DMC with the 4-3-2-1 it is still a very effective attacking formation to counter the Diamond with, mainly because of the strong middle as well as having attacking flanks.
If during the match you feel the AMC is taking advantage, then a simple (DOWN) arrow would be placed on the middle MC which in turn effectively would be turning this formation into a 4-5-1 V Style.

But my opponent does not play the diamond