The fishing spot: g7 and c7
The fishing horse (钓鱼马, also 高钓马) does not check at all — from g7 it dangles two hooks at once: e8 and f9, the king's every exit on that side. The king sees the bait and cannot bite. The horse has done its silent work here; the chariot must now deliver the actual check, and the old soldier on c9 closes the far door at d9. One slide, and the king finds all three doors locked — reel the line in.