Preconditions II

 Same position. From blacks point of view.

Black to move

rnb2rk1/1pq1bppp/p2ppn2/8/3NPPP1/2N1B3/PPP1B2P/R2Q1RK1 b - g3 0 10

Which black defenders can intervene with the active lines of attack (LoAs) against the black king?

• Nf6-h7
• Nf6-e8-g7
• Nf6-h5
• Nf6-g4
• Bc8-g4

The following pieces need too much time to have an influence on the LoAs:

• Rf8
• Qc7
• Nc6
• Ra8

The black pawns are blockading the defenders:

• e6
• d6

Although the black pawns are mobile, there is not enough time to set up a defense or a counter attack, because Nf6 is about to be kicked, thus losing another defender with tempo. The black pieces on the queenside are undeveloped, hence unable to participate in a counter attack yet.