Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Solves puzzle from Prequel Adventure comic (Mar 04, 2014 http://www.prequeladventure.com/2014/03/aggy-extrapolate/ ). Sample output: https://gist.github.com/YellowAfterlife/9369636
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Graphics;
import flash.display.Sprite;
import flash.events.KeyboardEvent;
import flash.events.TimerEvent;
import flash.geom.Rectangle;
import flash.Lib;
import flash.text.TextField;
import flash.utils.Timer;
import openfl.Assets;
//
class Board {
public var pegs:Array<Array<Bool>>;
public var x1:Int = -1;
public var y1:Int = -1;
public var x2:Int = -1;
public var y2:Int = -1;
public function new() {
var o = true, _ = false;
pegs = [
[o],
[o,o],
[o,_,o],
[o,o,o,o],
[o,o,o,o,o]
];
}
public function clone(y1:Int, x1:Int, y2:Int, x2:Int):Board {
var r = new Board();
for (i in 0 ... pegs.length) {
var m = pegs[i], q = r.pegs[i];
for (j in 0 ... m.length) q[j] = m[j];
}
r.x1 = x1; r.y1 = y1;
r.x2 = x2; r.y2 = y2;
return r;
}
public function solve(m:Array<Board>):Bool {
var n:Int = pegs.length, l:Int, r:Board, c:Int = count();
m.push(this);
if (c == 1) return true;
for (i in 0 ... n) {
l = pegs[i].length;
for (j in 0 ... l) if (pegs[i][j]) {
// up-left:
if (i >= 2 && j >= 2 && pegs[i - 1][j - 1] && !pegs[i - 2][j - 2]) {
r = clone(i, j, i - 2, j - 2);
r.pegs[i][j] = false;
r.pegs[i - 1][j - 1] = false;
r.pegs[i - 2][j - 2] = true;
if (r.solve(m)) return true;
}
// up-right:
if (i >= 2 && j < i - 1 && pegs[i - 1][j] && !pegs[i - 2][j]) {
r = clone(i, j, i - 2, j);
r.pegs[i][j] = false;
r.pegs[i - 1][j] = false;
r.pegs[i - 2][j] = true;
if (r.solve(m)) return true;
}
// down-left:
if (i + 2 < n && pegs[i + 1][j] && !pegs[i + 2][j]) {
r = clone(i, j, i + 2, j);
r.pegs[i][j] = false;
r.pegs[i + 1][j] = false;
r.pegs[i + 2][j] = true;
if (r.solve(m)) return true;
}
// down-right:
if (i + 2 < n && pegs[i + 1][j + 1] && !pegs[i + 2][j + 2]) {
r = clone(i, j, i + 2, j + 2);
r.pegs[i][j] = false;
r.pegs[i + 1][j + 1] = false;
r.pegs[i + 2][j + 2] = true;
if (r.solve(m)) return true;
}
// left:
if (j >= 2 && pegs[i][j - 1] && !pegs[i][j - 2]) {
r = clone(i, j, i, j - 2);
r.pegs[i][j] = false;
r.pegs[i][j - 1] = false;
r.pegs[i][j - 2] = true;
if (r.solve(m)) return true;
}
// left:
if (j + 2 < l && pegs[i][j + 1] && !pegs[i][j + 2]) {
r = clone(i, j, i, j + 2);
r.pegs[i][j] = false;
r.pegs[i][j + 1] = false;
r.pegs[i][j + 2] = true;
if (r.solve(m)) return true;
}
}
}
m.pop();
return false;
}
public function toString():String {
var r = "", n:Int = pegs.length, m:Array<Bool>;
for (i in 0 ... n) {
r += StringTools.rpad("\n", " ", n - i);
m = pegs[i];
for (j in 0 ... m.length) r += m[j]
? ((j == x2 && i == y2) ? "x " : "o ")
: ((j == x1 && i == y1) ? "* " : ". ");
}
return r;
}
public function count():Int {
var r:Int = 0;
for (m in pegs) for (v in m) if (v) r++;
return r;
}
}
class Main {
public function new() {
var board = new Board();
var moves:Array<Board> = [];
board.solve(moves);
for (i in 0 ... moves.length) {
Lib.trace("Turn " + (i + 1) + ": " + moves[i]);
}
}
@:keep static function main() new Main();
}
@RPKn

This comment has been minimized.

Copy link

RPKn commented Mar 8, 2014

cripes man, really, really cool, but how come you came up with that in just half an hour... frack I really need to work on my skills! hahaha

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.