add killBoxMate puzzle theme - closes #16696

modules/coreI18n/src/main/key.scala

@@ -1274,6 +1274,8 @@ object I18nKey:
     val `interferenceDescription`: I18nKey = "puzzleTheme:interferenceDescription"
     val `intermezzo`: I18nKey = "puzzleTheme:intermezzo"
     val `intermezzoDescription`: I18nKey = "puzzleTheme:intermezzoDescription"
+    val `killBoxMate`: I18nKey = "puzzleTheme:killBoxMate"
+    val `killBoxMateDescription`: I18nKey = "puzzleTheme:killBoxMateDescription"
     val `knightEndgame`: I18nKey = "puzzleTheme:knightEndgame"
     val `knightEndgameDescription`: I18nKey = "puzzleTheme:knightEndgameDescription"
     val `long`: I18nKey = "puzzleTheme:long"

modules/puzzle/src/main/PuzzleTheme.scala

@@ -49,6 +49,7 @@ object PuzzleTheme:
   val interference   = PuzzleTheme(i.interference, i.interferenceDescription)
   val intermezzo     = PuzzleTheme(i.intermezzo, i.intermezzoDescription)
   val kingsideAttack = PuzzleTheme(i.kingsideAttack, i.kingsideAttackDescription)
+  val killBoxMate    = PuzzleTheme(i.killBoxMate, i.killBoxMateDescription)
   val knightEndgame  = PuzzleTheme(i.knightEndgame, i.knightEndgameDescription)
   val long           = PuzzleTheme(i.long, i.longDescription)
   val master         = PuzzleTheme(i.master, i.masterDescription)
@@ -139,6 +140,7 @@ object PuzzleTheme:
       doubleBishopMate,
       dovetailMate,
       hookMate,
+      killBoxMate,
       smotheredMate
     ),
     I18nKey.puzzle.specialMoves -> List(

translation/source/puzzleTheme.xml

@@ -57,6 +57,8 @@
   <string name="interferenceDescription">Moving a piece between two opponent pieces to leave one or both opponent pieces undefended, such as a knight on a defended square between two rooks.</string>
   <string name="intermezzo">Intermezzo</string>
   <string name="intermezzoDescription">Instead of playing the expected move, first interpose another move posing an immediate threat that the opponent must answer. Also known as "Zwischenzug" or "In between".</string>
+  <string name="killBoxMate">Kill box mate</string>
+  <string name="killBoxMateDescription">A rook is next to the enemy king and supported by a queen that also blocks the king's escape squares. The rook and the queen catch the enemy king in a 3 by 3 "kill box".</string>
   <string name="knightEndgame">Knight endgame</string>
   <string name="knightEndgameDescription">An endgame with only knights and pawns.</string>
   <string name="long">Long puzzle</string>

ui/@types/lichess/i18n.d.ts

@@ -2471,6 +2471,10 @@ interface I18n {
     intermezzo: string;
     /** Instead of playing the expected move, first interpose another move posing an immediate threat that the opponent must answer. Also known as "Zwischenzug" or "In between". */
     intermezzoDescription: string;
+    /** Kill box mate */
+    killBoxMate: string;
+    /** A rook is next to the enemy king and supported by a queen that also blocks the king's escape squares. The rook and the queen catch the enemy king in a 3 by 3 "kill box". */
+    killBoxMateDescription: string;
     /** Kingside attack */
     kingsideAttack: string;
     /** An attack of the opponent's king, after they castled on the king side. */