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====Zugzwang in xiangqi endgames==== {| style="margin:0 0 1em 1em; float:right; width:230px; padding:8px; border:1px solid #000;" | {{Xiangqi-position | | | | | | | | | | | | | |gd| |sl| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |gl| | | | | | | | | | | | | | |25}} Red wins with either side to move. |} Inducing [[zugzwang]] is a crucial theme in winning simple endgames, and almost exclusively in simple endgames. In the general + soldier vs general endgame shown on the right, Red's first main goal is to occupy the middle file. Red wins with 1. Gd1, a waiting move, and Black is in zugzwang. Black must proceed with 1. ...Ge8, as 1. ...Ge10 instantly loses after 2. f9#. After 1. ...Ge8 2. f9 Gf8 3. e9 Ge8 4. d9 Gf8 5. Ge1, Red's general successfully occupies the middle file. The game would conclude with 5. ...Gf9 6. e9+, and regardless of Black's reply, 7. Ge2# (stale)mates Black. {{clear}} {| style="margin:0 0 1em 1em; float:right; width:230px; padding:8px; border:1px solid #000;" | {{Xiangqi-position | | | | |gd| | | | | | | |sl| |sl| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |el| | | | | | | |sd| |sd| | | | | | | |gl| | | | |25}} Reciprocal zugzwang: Whoever moves first loses. |} Reciprocal zugzwang is possible, but very rare and usually seen in endgame compositions. In this endgame shown on the right, whoever moves loses, since when either of the two generals moves to an open d- or f- file, it threatens unstoppable mate, while the player to move only helps the enemy general occupy one of the files. For instance, Red can only move their two soldiers if he is to move. Moving the f-(or d-)soldier allows the enemy general to occupy the f-file(d-file). Even if 1. fe9+ Gf10 2. d10, when Red threatens mate in 1, Black still mates immediately with either 2. ...fe2# or 2. ...f1#. {{clear}}
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