10. Nm6xl8+ .. any .. Ri7xm7+ .. Kxm7
11. Nl8(any)+ .. any .. Qxm7# (It doesn't matter whether blue plays Nd8/c9e10 and Ne10xf12+ as Yellow can capture the Green king before Blue mates.)
OR
10. .. .. .. Kn8
11. Nxm10+
with a powerful attack and prospects of eventual mate.
Nxl8 Ne10 Rxm7 Kn8 (since otherwise king capture on m7) Nxm10+ NxNf12 (since otherwise yellow can push either j12 or j11 leading to another king capture on n9 after red moves the knight) exNf12 Kn9 Nl8+ Nxd11 (or any other move) Rn7#
green prolly should have gone Qj7 on the last move instead hoping for some counterplay with Nxi14 or something
Red to move
PGN4
1. h2-h3 .. b7-c7 .. g13-g12 .. m8-l8
2. Ne1-f3 .. Qa8-d5 .. k13-k11 .. Qn7-j11
3. Qg1-i3 .. Na10-c9 .. Qh14-g13 .. Bn9-m8
4. Qi3-i7 .. b4-d4 .. Rk14-k12 .. Nn10-l11
5. Nj1-i3 .. Na5-c6 .. d13-d11 .. m4-k4
6. Nf3-h4 .. b10-d10 .. Ne14-f12 .. Nn5-l6
7. Nh4-i6 .. Qd5-i5 .. Rk12-i12 .. Nl11-k13
8. Ni6-k5 .. Qi5xQi7 .. Ri12xQi7 .. Kn8-n7
9. Nk5xm6 .. Nc6-d8 .. i13-i12 .. Qj11-j6