COMPLETE ORIGINAL XIANGQI PRACTICE POSITIONS
Fixed Red-side files a-i,ranks0-9.All unlisted intersections empty.

F01 Move along or away from the file
Side to move: r
Pieces: e0 rG, e4 rC, e9 bG
Proposals: e4-f4, e4-e5
Answer: Along-file movement preserves the block;sideways movement removes it.
Explanation: The cannon is the sole blocker and has no capture screen toward either general.No screen is needed for the quiet e4–e5 move.
FEN: 4k4/9/9/9/9/4C4/9/9/9/4K4 w - - 0 1

F02 Another blocker survives
Side to move: r
Pieces: e0 rG, e4 rH, e6 bH, e9 bG
Proposals: e4-g5
Answer: The horse may leave because e6 remains occupied.
Explanation: The horse uses empty f4 as its leg;Black horse e6 remains strictly between the generals.No other enemy attack on e0 appears.
FEN: 4k4/9/9/4n4/9/4N4/9/9/9/4K4 w - - 0 1

F03 An outside capture replaces the blocker
Side to move: r
Pieces: b4 rR, e0 rG, e4 bH, e9 bG
Proposals: b4-e4
Answer: The capture preserves a blocker on e4.
Explanation: The chariot captures the horse at e4 and now occupies e4 itself.It gives a chariot check to Black;it does not leave facing generals.
FEN: 4k4/9/9/9/9/1R2n4/9/9/9/4K4 w - - 0 1

F04 A Black blocker has the same duty
Side to move: b
Pieces: e0 rG, e4 bC, e9 bG
Proposals: e4-f4, e4-e5
Answer: The rule also rejects Black moving the final blocker sideways.
Explanation: Colour does not determine whether a point blocks the file.Black may move the cannon along the clear file while keeping both generals separated.
FEN: 4k4/9/9/9/9/4c4/9/9/9/4K4 b - - 0 1

F05 The general steps to another file
Side to move: r
Pieces: e0 rG, e4 rC, e9 bG
Proposals: e0-d0
Answer: The general may legally step to d0.
Explanation: d0 is one orthogonal step within Red palace.The generals then have different files,with no other enemy attack on d0.
FEN: 4k4/9/9/9/9/4C4/9/9/9/4K4 w - - 0 1