Implement king alt move on server.

game/src/lib.rs

@@ -637,6 +637,24 @@ impl Game {
                         }
                     }
                 }
+
+                // Hearth
+                3 => {
+                    for target in &self.board.pieces {
+                        if let Some(target) = target {
+                            let tile = self.board.tiles[target.tile as usize];
+                            if !tile.threat[!target.player as usize] && target.blocking == 0 {
+                                plays.push(PlayInfo {
+                                    valid: true,
+                                    threat: false,
+                                    play: Play::from_alt(piece.tile, target.tile),
+                                    check: CheckState::new(),
+                                    blocking: 0,
+                                });
+                            }
+                        }
+                    }
+                }
                 
                 _ => { }
             }

game/src/piece/mod.rs

@@ -125,7 +125,9 @@ pub const PIECES :[PieceClass; PIECES_COUNT] = [
         name: "Heart",
         moves: MoveSet::new()
             .add(bit(0) | bit(1) | bit(2) | bit(3) | bit(4) | bit(5) | bit(7) | bit(10)),
-        pmoves: MoveSet::new(),
+        pmoves: MoveSet::new()
+            .add(bit(0) | bit(1) | bit(2) | bit(3) | bit(4) | bit(5) | bit(7) | bit(10))
+            .add_alt(3),
     },
 ];