yep

Shogi.Domain/Pieces/Piece.cs

@@ -81,5 +81,15 @@ namespace Shogi.Domain.Pieces
 
 			return Array.Empty<Vector2>();
 		}
+
+		/// <summary>
+		/// Get all positions this piece could move to from the currentPosition, respecting the move-set of this piece.
+		/// </summary>
+		/// <param name="currentPosition"></param>
+		/// <returns>A list of positions the piece could move to.</returns>
+		public IEnumerable<Vector2> GetPossiblePositions(Vector2 currentPosition)
+		{
+			throw new NotImplementedException();
+		}
 	}
 }

Shogi.Domain/StandardRules.cs

@@ -1,4 +1,5 @@
-using BoardTile = System.Collections.Generic.KeyValuePair<System.Numerics.Vector2, Shogi.Domain.Pieces.Piece>;
+using Shogi.Domain.Pathing;
+using BoardTile = System.Collections.Generic.KeyValuePair<System.Numerics.Vector2, Shogi.Domain.Pieces.Piece>;
 
 namespace Shogi.Domain
 {
@@ -206,27 +207,34 @@ namespace Shogi.Domain
 						.Where(tile => PieceHasLineOfSight(tile, threatBlockingPosition))
 						.ToList();
 
-					if (tilesThatCouldBlockTheThreat.Any())
+					if (tilesThatDoBlockThreat.Any())
 					{
 						return false; // Cannot be check-mate if a piece can intercept the threat.
 					}
 				}
-				//var line = Vector2.Subtract(kingPosition, threat.Position);
-				//var slope = line.Y / line.X;
-				//foreach (var tile in tilesThatCouldBlockTheThreat)
-				//{
-				//	// y = mx + b; slope intercept
-				//	// b = -mx + y;
-				//	var b = -slope * tile.Position.X + tile.Position.Y;
-				//	//if (tile.Position.Y = slope * tile.Position.X + )
-				//}
+			}
+			else
+			{
+				/*
+				 * If no ability to block the check, maybe the king can evade check by moving.
+				*/
+				
+
+				// TODO: Implement this in the Piece class instead.
+				var possibleSafePositions = new[]
+				{
+						Direction.Up, Direction.Down, Direction.Left, Direction.Right, Direction.UpLeft, Direction.UpRight, Direction.DownLeft, Direction.DownRight
+				}
+				.Select(direction => kingPosition + direction);
+
+				foreach (var maybeSafePosition in possibleSafePositions)
+				{
+
+				}
+
 			}
 
-			/* If no ability to block the check, maybe the king can evade check by moving.
-			 * 
-			 * Foreach position the king can reach
-			 *	Foreach piece owned by "other player", check if piece threatens king position.
-			 */
+
 
 			return false;
 		}