feat: draw board

board.go

@@ -1,17 +1,30 @@
 package main
 
-import "fmt"
-
 type Board struct {
 	Players []Player
+	Grid    [8][8]string
 }
 
-func (b Board) String() string {
-	var s string
+func (b *Board) Draw() {
 	for _, player := range b.Players {
 		for _, piece := range player.Pieces {
-			s += fmt.Sprint(piece)
+			b.Grid[piece.Position[0]-1][piece.Position[1]-1] = piece.String()
 		}
 	}
+}
+
+func (b *Board) String() string {
+	var s string
+	for row := 0; row < 8; row++ {
+		for col := 0; col < 8; col++ {
+			s += " "
+			if b.Grid[row][col] == "" {
+				s += " "
+			} else {
+				s += b.Grid[row][col]
+			}
+		}
+		s += "\n"
+	}
 	return s
 }

main.go

@@ -25,6 +25,8 @@ type model struct {
 func (m model) Init() tea.Cmd { return nil }
 
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
+	m.Board.Draw()
+
 	switch msg := msg.(type) {
 	case tea.KeyMsg:
 		switch msg.String() {

piece.go

@@ -92,7 +92,7 @@ func InitialPieces(color color) []Piece {
 	}
 
 	for i, p := range []piece{Rook, Knight, Bishop, Queen, King, Knight, Bishop, Rook} {
-		pieces = append(pieces, NewPiece(p, position{backRank, i}, color))
+		pieces = append(pieces, NewPiece(p, position{backRank, i + 1}, color))
 	}
 
 	return pieces