tictactoe/main.cpp

#include <iostream>
#include <stdlib.h>
#include <bits/stdc++.h>
#include <thread>
using namespace std;

class Game {
  unsigned long white = 0, black = 0;

  public:
  void print() {
    for(int i=0; i<4; i++) {
      for(int j=0; j<4; j++) {
        for(int k=0; k<4; k++) {
          bool w = white >> (k + i*4 + j*16) & 1;
          bool b = black >> (k + i*4 + j*16) & 1;
          cout << (b&&w ? 'E' : (w ? 'W' : (b ? 'B' : '.')));

        }
        cout << ' ';
      }
      cout << endl;
    }
    cout << endl;
  }

  int freeLocations() {
    return ((white | black) >> 16*3) ^ 0xFFFF;
  }

  bool place(unsigned long & map) {
    int locations = freeLocations();
    if(locations == 0)
      return false;
    int choice;
    do {
      choice = rand() % 16;
    } while ((locations & (1 << choice)) == 0);

    for(int i=0; i<4; i++) {
      if(((black|white) & 1UL << (i*16 + choice)) == 0) {
          map |= 1UL << (i*16 + choice);
        break;
      }
    }

    return true;
  }
  int check(unsigned long set) {
    for(int i=0; i<4; i++) {
      for(int j=0; j<4; j++) {
        // horizontal x
        if((set >> (i*4 + j*16) & 15) == 15) return 1;
        // vertical y
        if((set >> (i + j*4) & 0x1000100010001UL) == 0x1000100010001UL) return 2;
        // horizontal z
        if((set >> (i + j*16) & 0x1111) == 0x1111) return 3;
      }
      // diagonal xz
      if((set >> i*16 & 0x8421) == 0x8421) return 10;
      if((set >> i*16 & 0x1248) == 0x1248) return 11;
      // diagonal xy
      if((set >> i*4 & 0x8000400020001UL) == 0x8000400020001UL) return 20;
      if((set >> i*4 & 0x1000200040008UL) == 0x1000200040008UL) return 21;
      // diagonal yz
      if((set >> i & 0x1000010000100001UL) == 0x1000010000100001UL) return 30;
      if((set >> i & 0x1001001001000UL) == 0x1001001001000UL) return 31;

    }
    // diagonal xyz
    if((set & 0x8000040000200001UL) == 0x8000040000200001UL) return 40;
    if((set & 0x1000020000400008UL) == 0x1000020000400008UL) return 41;
    if((set & 0x8004002001000UL) == 0x8004002001000UL) return 50;
    if((set & 0x1002004008000UL) == 0x1002004008000UL) return 51;

    return 0;
  }

  int play(int startPosition) {
    white = 1 << startPosition;
    black = 0;
    while(freeLocations()) {
      place(black);
      //print();
      int result = check(black);
      if(result) {
        return -result;
      }
      place(white);
      //print();
      result = check(white);
      if(result) {
        return result;
      }
    }
  }
};


void do_work(int startPosition) {
  int whiteCount=0, blackCount=0, draw=0, x=0, y=0, z=0, xy=0, xz=0, yz=0, xyz=0;
  for(int i=1; i<=1000000; i++) {
    Game game;
    int result = game.play(startPosition);
    if(result > 0)
      whiteCount++;
    if(result < 0)
      blackCount++;
    if(result == 0)
      draw++;
    else if(abs(result) == 1)
      x++;
    else if(abs(result) == 2)
      y++;
    else if(abs(result) == 3)
      z++;
    else if(abs(result) < 20)
      xz++;
    else if(abs(result) < 30)
      xy++;
    else if(abs(result) < 40)
      yz++;
    else
      xyz++;
    
  }
  printf(
    "Start position: %d White: %d Black: %d Draw: %d x: %d y: %d z: %d xz: %d xy: %d yz: %d xyz: %d\n", 
    startPosition, whiteCount, blackCount, draw, x, y, z, xz, xy, yz, xyz);
}

int main() {
  list<thread> threads;
  for(int i=0; i<16; i++) {
    threads.push_front(thread(do_work, i));
  }
  for(auto &t : threads) {
    t.join();
  }
}