From 9309e6671c090eb18ff3864557e9cbbaac14514c Mon Sep 17 00:00:00 2001
From: Jacob Signorovitch <jsignorovitch@commschool.org>
Date: Thu, 24 Apr 2025 12:15:57 -0400
Subject: [PATCH] Yes.

---
 chess/src/chess/Main.java | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/chess/src/chess/Main.java b/chess/src/chess/Main.java
index 70e6cdb..c69a5d7 100644
--- a/chess/src/chess/Main.java
+++ b/chess/src/chess/Main.java
@@ -19,6 +19,15 @@ class Loc {
         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.
@@ -30,7 +39,29 @@ enum PieceCol {
         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() {}
+}