diff --git a/chess/src/chess/Main.java b/chess/src/chess/Main.java
index c69a5d7..6347780 100644
--- a/chess/src/chess/Main.java
+++ b/chess/src/chess/Main.java
@@ -1,67 +1,3 @@
 package chess;
 
-import java.awt.Color;
-import java.util.List;
-import java.util.Map;
-import javax.swing.Action;
-
-// A chessboard.
-class Board {
-    Map<Loc, Piece> board;
-}
-
-// A location on the board. Measured from top left corner.
-class Loc {
-    int x;
-    int y;
-
-    Loc(int x, int y) {
-        this.x = x;
-        this.y = y;
-    }
-
-    Loc up() { return new Loc(this.x, this.y - 1); }
-    Loc down() { return new Loc(this.x, this.y + 1); }
-    Loc right() { return new Loc(this.x + 1, this.y); }
-    Loc left() { return new Loc(this.x - 1, this.y); }
-    Loc up(PieceCol col) { return new Loc(this.x, this.y - 1 * col.n()); }
-    Loc down(PieceCol col) { return new Loc(this.x, this.y + 1 * col.n()); }
-    Loc right(PieceCol col) { return new Loc(this.x + 1, this.y * col.n()); }
-    Loc left(PieceCol col) { return new Loc(this.x - 1, this.y * col.n()); }
-}
-
-// The color a chess piece may assume.
-enum PieceCol {
-    BLACK,
-    WHITE;
-
-    Color mk() {
-        return this.equals(BLACK) ? new Color(0, 0, 0)
-                                  : new Color(255, 255, 255);
-    }
-
-    int n() { return this.equals(WHITE) ? 1 : -1; }
-}
-
-// The sort of piece.
-enum PieceType { PAWN, ROOK, KNIGHT, BISHOP, QUEEN, KING }
-
-abstract class Piece {
-    Loc loc;
-    PieceType type;
-    PieceCol col;
-
-    Piece(Loc loc, PieceType type, PieceCol col) {
-        this.loc = loc;
-        this.type = type;
-        this.col = col;
-    }
-
-    List<Loc> moves() { return List.of(this.loc.up(this.col)); }
-}
-
-class Pawn extends Piece {
-    Pawn(Loc loc, PieceType type, PieceCol col) { super(loc, type, col); }
-
-    List<Loc> moves() {}
-}
+class Main {}