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

E01 An open eye
Side to move: r
Pieces: e0 rG, e2 rE, f9 bG
Proposals: e2-g4
Answer: e2–g4 is allowed.
Explanation: The displacement is +2 files,+2 ranks; midpoint f3 is empty;g4 stays on Red rank4;both generals remain safe.
FEN: 5k3/9/9/9/9/9/9/4B4/9/4K4 w - - 0 1

E02 A friendly eye blocker
Side to move: r
Pieces: e0 rG, e2 rE, f3 rH, f9 bG
Proposals: e2-g4
Answer: The horse on f3 blocks the eye.
Explanation: f3 is the midpoint;the friendly horse is not a landing piece and cannot be jumped.
FEN: 5k3/9/9/9/9/9/5N3/4B4/9/4K4 w - - 0 1

E03 An enemy eye blocker
Side to move: r
Pieces: e0 rG, e2 rE, f3 bH, f9 bG
Proposals: e2-g4
Answer: The black horse on f3 also blocks the eye.
Explanation: A capture would occur at g4,not at f3;an enemy midpoint cannot be captured along the route.
FEN: 5k3/9/9/9/9/9/5n3/4B4/9/4K4 w - - 0 1

E04 Capture at the destination
Side to move: r
Pieces: e0 rG, e2 rE, f9 bG, g4 bR
Proposals: e2-g4
Answer: Red captures the chariot at g4.
Explanation: f3 is empty;the enemy stands at the landing point;only g4 bR is removed;generals remain safe.
FEN: 5k3/9/9/9/9/6r2/9/4B4/9/4K4 w - - 0 1

E05 Empty eye across the river
Side to move: r
Pieces: c4 rE, e0 rG, f9 bG
Proposals: c4-e6
Answer: The move is rejected for crossing the river.
Explanation: The midpoint d5 is empty,but the Red elephant would land on rank6 outside its own half.
FEN: 5k3/9/9/9/9/2B6/9/9/9/4K4 w - - 0 1

E06 Friendly destination
Side to move: r
Pieces: e0 rG, e2 rE, f9 bG, g4 rH
Proposals: e2-g4
Answer: Red cannot land on its own horse.
Explanation: The empty eye does not override friendly destination occupancy.
FEN: 5k3/9/9/9/9/6N2/9/4B4/9/4K4 w - - 0 1

E07 Eye passes but the general is exposed
Side to move: r
Pieces: e0 rG, e2 rE, e9 bG
Proposals: e2-g4
Answer: The move would expose facing generals.
Explanation: e2 is the only e-file blocker;after moving to g4 there would be no occupied point between e0 and e9.
FEN: 4k4/9/9/9/9/9/9/4B4/9/4K4 w - - 0 1