47 lines
914 B
Swift
47 lines
914 B
Swift
final class King: Piece {
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typealias Threats = (Piece?, Piece?)
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internal private(set) var threats: Threats = (nil, nil)
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func insertThreat(_ piece: Piece) {
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if threats.0 == nil {
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threats.0 = piece
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return
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}
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if threats.1 == nil {
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threats.1 = piece
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return
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}
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}
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override var unicodeRepresentation: String {
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return color == .Black ? "♚" : "♔"
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}
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override var pseudoLegalPositions: [Square.Position] {
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[
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position + (1, 0),
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position + (1, 1),
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position + (0, 1),
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position + (-1, 1),
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position + (-1, 0),
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position + (-1, -1),
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position + (0, -1),
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position + (1, -1),
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].filter { $0.index != nil }
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}
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override func isLegal(on pos: Square.Position) -> Bool {
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guard super.isLegal(on: pos) else {
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return false
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}
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// Do stuff
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return true
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}
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init(with color: Color, on position: Square.Position) {
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super.init(kind: .King, on: position, with: color)
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}
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}
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