Xiangqi classical openings: Central Cannon vs Screen Horses
Set up the Central Cannon and Screen Horses with consistent coordinates. Compare development, central pressure and the defensive replies before choosing a continuation.
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Development is coordination, not a deadline
There is no opening length or chariot-development deadline that applies to every position. Mobilize chariots, horses and cannons so they cooperate, while keeping the general safe. A proverb about bringing out a chariot is not a rule that determines the result.
Compare what a developing piece gains with what it stops protecting. An opposing threat may require a defensive move first; an exchange may open a useful file. Apply development principles to the actual position rather than forcing a memorized sequence.
The Central Cannon: correct coordinates and actual pressure
This site fixes A–I left to right and 1–10 top to bottom, with Red at the bottom. Red's right cannon begins on H8. Cannon 2 across to 5 is H8–E8, not a move from rank 10. Black's central soldier is on E4; Red's is on E7.
After H8–E8, E7 is the single screen between the cannon and Black's E4 soldier. However, both E7 and E4 lie between the cannon and Black's general on E1. With two screens, this is not check. The opening does not automatically prohibit all lateral general moves. A capture's legality and whether the cannon can subsequently be recaptured must be examined separately.
Try the matching board lesson, then return to your reading.
Open the practice boardBuild Screen Horses in four plies
A reproducible setup is Red H8–E8, Black H1–G3, Red H10–G8, Black B1–C3. Each move follows from the previous position. This is an illustrative order, not a unique opening or a guarantee of best play.
Black's horses on C3 and G3 attack E4 through the leg squares D3 and F3. With these legs clear and the general safe, Black can consider recapturing a red cannon that takes the central soldier. The structure supports the centre but is not an impenetrable fortress. Blocked legs, soldier moves and exchanges can change the relationship.
Compare continuations through the opponent's reply
In this setup, predict Black's recapture before deciding whether taking E4 is worthwhile. Then examine the route opened for Red's I10 chariot when the horse leaves H10. You need not choose a long variation to explain a move's purpose and cost.
Review premature captures without a safe retreat, changes to horse legs and moves that expose the general. Not every soldier advance blocks a horse, and not every cannon raid loses material. Use coordinates and an actual reply to establish the problem rather than relying on a slogan.
Pause and test your reasoning
Does Red's H8–E8 immediately check Black's general, and why?
Reveal the answer and reasoning
No. Red's E7 soldier and Black's E4 soldier both lie between E8 and E1. A cannon needs exactly one screen to capture, not two. E4 is the target beyond one screen.
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