Removing the defender in xiangqi means capturing, deflecting or blocking the piece that guards your target. Two engine-checked examples show how.
Removing the defender in xiangqi means dealing with the piece that guards your real target before you go after the target itself. You capture the guard, drag it away with a check, or cut the line it defends along. Once it is gone, the piece or the mate it was protecting is yours.
You will see the same tactic under other names, such as elimination of defence, deflection or undermining. The label matters less than the habit behind it. Whenever an attack almost works, stop and ask which single enemy piece is spoiling it. That piece is your new target.
Directions below are from Red's side of the board, with left and right as Red sees them, and both examples were checked move by move with our rules engine.
Who does the guarding
In xiangqi the guards are usually the palace defenders. The two Advisors cover the palace centre and its four corners. The two Elephants watch the points around the palace and often stand in the way of Cannon lines. A full set of four is solid, but each of those pieces tends to have more than one job, and that is where the trouble starts.
Chinese players have a name for the bluntest version: 砍士 (kǎn shì), chopping an Advisor. A Chariot or Horse takes an Advisor, sometimes as a sacrifice, because the mate behind it is worth far more than the piece. Two quieter versions are pure xiangqi. You can stuff an Elephant's eye (塞象眼) by putting a piece on the point the Elephant must pass over, and you can hobble a Horse's leg (蹩马腿) the same way. Neither captures anything, yet both switch a defender off.
Four ways to get rid of a guard
Capture it. This is the simplest way, and the most common when the guard is an Advisor standing next to its General. If the capture comes with check, the defender gets no time to fill the hole.
Deflect it. Give a check or make a threat that only the guard can answer. When it moves to deal with that, it leaves its post behind. Chinese players call this 引离 (yǐn lí), luring away.
Block it. Put a piece between the guard and the thing it protects, whether on a Chariot's line, an Elephant's eye or a Horse's leg. The guard stays on the board but no longer guards anything.
Overload it. If one piece is guarding two things, attack both. It can only look after one of them.
Worked example: the last Advisor
Black's General is on its home point with a single Advisor beside it, on the back-left corner of the palace. Red has a Horse on the central file at the front edge of Black's palace, and a Red Soldier stands right next to it on its right. Red's Chariot is on the file just left of centre, on Red's bank of the river, and Red's Cannon is on the same bank at the right edge. Black is ahead on material, with a Chariot and a Horse loose in Red's half, but every Black move in what follows is forced, so they never get a turn.
The pattern Red is aiming for is the Cannon behind the Horse: put the Cannon on the central file so it fires over the Horse at the General. Take the Advisor off the board and that move is mate at once. The engine confirms it.
With the Advisor still there, though, the Cannon check has exactly one answer. The Advisor steps into the palace centre, the Cannon now has two pieces to jump and the check is blocked. That Advisor is the only guard, so it is the piece to remove.
Red's Chariot runs up its file and takes the Advisor, giving check along the back rank. The General cannot take the Chariot back, because the Horse guards that corner, and its only legal move is to step up into the palace centre.
Now the Cannon slides along Red's river bank to the central file and fires over the Horse at the General. The Chariot on the back rank covers the point behind the General and the point to its left, while the Soldier covers the point to its right and guards the Horse. Checkmate.
Red won no material on the way, and that was never the point. Taking the Advisor removed the one piece that could answer the real threat.
Worked example: a check that drags the guard away
The second position is about winning material. Black's General is at home with one Advisor on the back-left corner of the palace and the other in the centre. Black's Horse stands on the front-left corner of the palace, and the only piece guarding it is that centre Advisor. Red's Chariot is at the right end of the same rank, attacking the Horse along the front of the palace. Red's second Chariot waits on Red's river bank, on the second file from the right. Black also has an Elephant at home on the left and a Chariot over on Red's side of the river, while Red's General sits on the back-right corner of its palace with an Advisor in the centre.
Taking the Horse straight away is a poor trade. The centre Advisor recaptures and Red has swapped a Chariot for a Horse.
Instead, Red first sends the second Chariot up its file to Black's back rank, checking the General along the rank. The General has no safe step, and the engine finds exactly one legal reply: the centre Advisor drops back to the empty right-hand corner to block the check.
That block is the whole point. The Advisor has left the centre, nothing guards the Horse any more, and the first Chariot takes it for free. No Black piece can recapture.
This is deflection in its plainest form. Red never attacked the Horse a second time. It gave the Horse's only guard a more urgent job.
Finding the guard in your own games
The method is the same every time. Name the target, whether it is a loose piece or a mating square. Then ask what stops you taking it right now. Usually the answer is one piece: an Advisor covering a corner, an Elephant blocking a Cannon line, a Horse guarding a Chariot.
Once you have named the guard, try the four options in order of force. Can you capture it with check? Can you give a check that only the guard can answer? Can you block its line, its eye or its leg? Is it already guarding something else that you can hit? Forcing options come first, because they leave the defender no time to bring in a second guard.
Remember that a General can be a guard as well. A General looking down an open file protects any of your pieces on that file that the enemy General might want to capture, because taking them would leave the two Generals facing each other. Moving a piece onto that file, or off it, can switch that protection on or off.
On defence, turn the question around. Look at your Advisors and Elephants and ask what each one is holding together. If one piece is doing two jobs, fix that before your opponent notices it.
Train the habit
Plenty of mating puzzles are removing-the-defender puzzles in disguise: the first move takes or deflects a guard and the mate follows. You will find many of them among XiangqiPlay's 5,000 engine-proven mate puzzles at /puzzles. To use the idea in real games, sign up for a free account and play the computer at any of its eight levels, Easy to God.
XiangqiPlay Team
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