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nineman.cpp
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nineman.cpp
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#include "nineman.h"
#include <iostream>
using namespace std;
NineManMorris::NineManMorris() :phase(1), numOfTokensInHandP1(9), numOfTokensInHandP2(9) {
}
void NineManMorris::display() {
gameboard.displayBoard();
}
bool NineManMorris::isGameOver() {
bool flag = false; //check if player is trapped
int currentplayer = 1;
int opposingplayer = 2;
//check if game is over by seeing if theres less than 3 pieces on the board
//it also has to be in phase 3, or else this will read as game over in phase 1
if (getTokensPlaced(1) < 3 && phase == 3) {
return true;
}
else if (getTokensPlaced(2) < 3 && phase == 3) {
return true;
}
//if a player gets trapped in phase 2 where a player slides pieces around
if (phase == 2) {
for (int j = 0; j < 2; j++) { //we have to loop twice in order to check player 1 the 2
for (int i = 0; i < 24; i++) {
if (gameboard.getBoard(i) == currentplayer) { //pulls in all of player 1's tokens
if (i == 0) {
if (gameboard.getBoard(1) == opposingplayer && gameboard.getBoard(9) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 1) {
if (gameboard.getBoard(0) == opposingplayer && gameboard.getBoard(4) == opposingplayer && gameboard.getBoard(2) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 2) {
if (gameboard.getBoard(1) == opposingplayer && gameboard.getBoard(4) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 3) {
if (gameboard.getBoard(4) == opposingplayer && gameboard.getBoard(10) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 4) {
if (gameboard.getBoard(1) == opposingplayer && gameboard.getBoard(3) == opposingplayer && gameboard.getBoard(5) == opposingplayer && gameboard.getBoard(7) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 5) {
if (gameboard.getBoard(4) == opposingplayer && gameboard.getBoard(13) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 6) {
if (gameboard.getBoard(7) == opposingplayer && gameboard.getBoard(11) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 7) {
if (gameboard.getBoard(6) == opposingplayer && gameboard.getBoard(4) == opposingplayer && gameboard.getBoard(8) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 8) {
if (gameboard.getBoard(7) == opposingplayer && gameboard.getBoard(12) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 9) {
if (gameboard.getBoard(0) == opposingplayer && gameboard.getBoard(10) == opposingplayer && gameboard.getBoard(21) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 10) {
if (gameboard.getBoard(3) == opposingplayer && gameboard.getBoard(9) == opposingplayer && gameboard.getBoard(11) == opposingplayer && gameboard.getBoard(18) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 11) {
if (gameboard.getBoard(6) == opposingplayer && gameboard.getBoard(10) == opposingplayer && gameboard.getBoard(15) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 12) {
if (gameboard.getBoard(8) == opposingplayer && gameboard.getBoard(13) == opposingplayer && gameboard.getBoard(17) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 13) {
if (gameboard.getBoard(12) == opposingplayer && gameboard.getBoard(5) == opposingplayer && gameboard.getBoard(14) == opposingplayer && gameboard.getBoard(20) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 14) {
if (gameboard.getBoard(2) == opposingplayer && gameboard.getBoard(13) == opposingplayer && gameboard.getBoard(23) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 15) {
if (gameboard.getBoard(11) == opposingplayer && gameboard.getBoard(16) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 16) {
if (gameboard.getBoard(15) == opposingplayer && gameboard.getBoard(17) == opposingplayer && gameboard.getBoard(19) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 17) {
if (gameboard.getBoard(16) == opposingplayer && gameboard.getBoard(12) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 18) {
if (gameboard.getBoard(10) == opposingplayer && gameboard.getBoard(19) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 19) {
if (gameboard.getBoard(16) == opposingplayer && gameboard.getBoard(18) == opposingplayer && gameboard.getBoard(20) == opposingplayer && gameboard.getBoard(22) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 20) {
if (gameboard.getBoard(19) == opposingplayer && gameboard.getBoard(13) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 21) {
if (gameboard.getBoard(9) == opposingplayer && gameboard.getBoard(22) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 22) {
if (gameboard.getBoard(19) == opposingplayer && gameboard.getBoard(21) == opposingplayer && gameboard.getBoard(23) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
else if (i == 23) {
if (gameboard.getBoard(22) == opposingplayer && gameboard.getBoard(14) == opposingplayer) {
flag = true;
}
else {
flag = false;
break;
}
}
}
}
if (flag == true) { //if we discover one player is already stuck we already know game is over
return true;
}
else {
currentplayer = 2;
opposingplayer = 1;
}
}
}
return false;
}
//first checks if it is time to change phases
bool NineManMorris::play(int player, int token, int MoveTo, int playType) {
//placing stage
if (phase == 1 && playType == 0) {
gameboard.setBoard(MoveTo, player);
if (player == 1) {
numOfTokensInHandP1--;
}
if (player == 2) {
numOfTokensInHandP2--;
}
gameboard.setPositionLastPlaced(MoveTo, player);
}
//moving phase
else if (phase == 2 && playType == 0) {
//change the spot where the player wants to move to
gameboard.setBoard(MoveTo, player);
//remove the spot where the player's token originally was. This gives the image that the token is moving
gameboard.setBoard(token, 0);
gameboard.setPositionLastPlaced(MoveTo, player);
}
else if (phase == 3 && playType == 0) {
//change the spot where the player wants to move to
gameboard.setBoard(MoveTo, player);
//remove the spot where the player's token originally was. This gives the image that the token is moving
gameboard.setBoard(token, 0);
gameboard.setPositionLastPlaced(MoveTo, player);
}
if (playType) { //means we are removing a piece because a mill was formed
if (gameboard.getBoard(token) == 0 || gameboard.getBoard(token) == player) {
return false;
}
else {
gameboard.tokenRemove = 0; //used for AI to know that it is turn to remove a token or not
gameboard.setBoard(token, 0);
return true;
}
}
return true;
}
//will check if move is valid first. If it is, then the board's function to actually complete the action is called
bool NineManMorris::isValid(int player, int token, int position) {
//regardless of phase, the position that the token wants to go to has to be empty
if (gameboard.getBoard(position) != 0) {
return false;
}
//phase 1 set of rules:
//1. player must still have token
else if (phase == 1) {
//determine which player we are getting info for
if (player == 1) {
if (getNumTokensP1() == 0) {
return false;
}
}
if (player == 2) {
if (getNumTokensP2() == 0) {
return false;
}
}
return true;
}
//phase 2 set of rules:
//1. their desired token to move must have their token
//2. the spot they want to go to must be adjacent
else if (phase == 2) {
if (player == 1) {
if (gameboard.getBoard(token) != 1) {
return false;
}
else {
//returns true or false
return gameboard.adjacentPositions(token, position);
}
}
else { //player 2
if (gameboard.getBoard(token) != 2) {
return false;
}
else {
return gameboard.adjacentPositions(token, position);
}
}
}
//phase 3 set of rules:
//1. the spot they choose to get the token from has to be their token
else if (phase == 3) {
if (player == 1) { //if player 1, we have to check the token they want to move is actually their token
if (gameboard.getBoard(token) == 1) {
return true;
}
}
if (player == 2) { //same as player 1
if (gameboard.getBoard(token) == 2) {
return true;
}
}
}
return false;
}
int NineManMorris::getPhase() {
return phase;
}
void NineManMorris::setPhase(int p) {
phase = p;
}
int NineManMorris::getNumTokensP1() {
return numOfTokensInHandP1;
}
int NineManMorris::getNumTokensP2() {
return numOfTokensInHandP2;
}
bool NineManMorris::checkTriple(int currentplayer, int spot) {
//given a spot, see if the two possible lines (horizontal/vertical) have 3 in a row
if (spot == 0) {
if ((gameboard.getBoard(1) == currentplayer && gameboard.getBoard(2) == currentplayer) || (gameboard.getBoard(9) == currentplayer && gameboard.getBoard(21) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 1) {
if ((gameboard.getBoard(0) == currentplayer && gameboard.getBoard(2) == currentplayer) || (gameboard.getBoard(4) == currentplayer && gameboard.getBoard(7) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 2) {
if ((gameboard.getBoard(0) == currentplayer && gameboard.getBoard(1) == currentplayer) || (gameboard.getBoard(23) == currentplayer && gameboard.getBoard(14) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 3) {
if ((gameboard.getBoard(4) == currentplayer && gameboard.getBoard(5) == currentplayer) || (gameboard.getBoard(10) == currentplayer && gameboard.getBoard(18) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 4) {
if ((gameboard.getBoard(3) == currentplayer && gameboard.getBoard(5) == currentplayer) || (gameboard.getBoard(2) == currentplayer && gameboard.getBoard(7) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 5) {
if ((gameboard.getBoard(3) == currentplayer && gameboard.getBoard(4) == currentplayer) || (gameboard.getBoard(13) == currentplayer && gameboard.getBoard(20) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 6) {
if ((gameboard.getBoard(7) == currentplayer && gameboard.getBoard(8) == currentplayer) || (gameboard.getBoard(11) == currentplayer && gameboard.getBoard(15) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 7) {
if ((gameboard.getBoard(6) == currentplayer && gameboard.getBoard(8) == currentplayer) || (gameboard.getBoard(1) == currentplayer && gameboard.getBoard(4) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 8) {
if ((gameboard.getBoard(6) == currentplayer && gameboard.getBoard(7) == currentplayer) || (gameboard.getBoard(12) == currentplayer && gameboard.getBoard(16) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 9) {
if ((gameboard.getBoard(10) == currentplayer && gameboard.getBoard(11) == currentplayer) || (gameboard.getBoard(0) == currentplayer && gameboard.getBoard(21) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 10) {
if ((gameboard.getBoard(9) == currentplayer && gameboard.getBoard(11) == currentplayer) || (gameboard.getBoard(3) == currentplayer && gameboard.getBoard(18) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 11) {
if ((gameboard.getBoard(15) == currentplayer && gameboard.getBoard(6) == currentplayer) || (gameboard.getBoard(9) == currentplayer && gameboard.getBoard(10) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 12) {
if ((gameboard.getBoard(13) == currentplayer && gameboard.getBoard(14) == currentplayer) || (gameboard.getBoard(8) == currentplayer && gameboard.getBoard(17) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 13) {
if ((gameboard.getBoard(12) == currentplayer && gameboard.getBoard(14) == currentplayer) || (gameboard.getBoard(20) == currentplayer && gameboard.getBoard(5) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 14) {
if ((gameboard.getBoard(12) == currentplayer && gameboard.getBoard(13) == currentplayer) || (gameboard.getBoard(2) == currentplayer && gameboard.getBoard(23) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 15) {
if ((gameboard.getBoard(6) == currentplayer && gameboard.getBoard(11) == currentplayer) || (gameboard.getBoard(16) == currentplayer && gameboard.getBoard(17) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 16) {
if ((gameboard.getBoard(15) == currentplayer && gameboard.getBoard(17) == currentplayer) || (gameboard.getBoard(19) == currentplayer && gameboard.getBoard(22) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 17) {
if ((gameboard.getBoard(15) == currentplayer && gameboard.getBoard(16) == currentplayer) || (gameboard.getBoard(8) == currentplayer && gameboard.getBoard(12) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 18) {
if ((gameboard.getBoard(3) == currentplayer && gameboard.getBoard(10) == currentplayer) || (gameboard.getBoard(19) == currentplayer && gameboard.getBoard(20) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 19) {
if ((gameboard.getBoard(18) == currentplayer && gameboard.getBoard(20) == currentplayer) || (gameboard.getBoard(22) == currentplayer && gameboard.getBoard(16) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 20) {
if ((gameboard.getBoard(18) == currentplayer && gameboard.getBoard(19) == currentplayer) || (gameboard.getBoard(5) == currentplayer && gameboard.getBoard(13) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 21) {
if ((gameboard.getBoard(0) == currentplayer && gameboard.getBoard(9) == currentplayer) || (gameboard.getBoard(22) == currentplayer && gameboard.getBoard(23) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 22) {
if ((gameboard.getBoard(21) == currentplayer && gameboard.getBoard(23) == currentplayer) || (gameboard.getBoard(16) == currentplayer && gameboard.getBoard(19) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
else if (spot == 23) {
if ((gameboard.getBoard(2) == currentplayer && gameboard.getBoard(14) == currentplayer) || (gameboard.getBoard(22) == currentplayer && gameboard.getBoard(21) == currentplayer)) {
gameboard.tokenRemove = 1;
return true;
}
}
return false;
}
int NineManMorris::getTokensPlaced(int player) {
//counts how many tokens are placed on the board
int counter = 0;
for (int i = 0; i < 24; i++) {
if (gameboard.getBoard(i) == player) {
counter++;
}
}
return counter;
}
int NineManMorris::playAI() {
Board bestBoard;
int position;
alphabeta(gameboard, 6, INT_MIN, INT_MAX, 2, position);
cout << "This position: " << position << endl;
gameboard.setBoard(position, 2);
numOfTokensInHandP2 -= 1; //decrease num of tokens in AI hand (main needs to know this to switch phases)
return position;
}
//maxPlayer = 2 means the AI, maxPlayer = 1 means the human
int NineManMorris::alphabeta(Board TreeNode, int depth, int alpha, int beta, int Player, int& position) {
//v will be the value passed up the tree
int v;
//check if a player won in the given board node
if (isGameOver()) {
return TreeNode.evaluateBoard(Player, phase);
}
//check if last node in branch
if (depth == 0) {
//return the heuristic value of node, this will generate the v value for the bottom node
return TreeNode.evaluateBoard(Player, phase);
}
if (Player == 2) {
v = INT_MIN;
//generate all children
vector<Board> possibleBoards = TreeNode.generateBoard(Player, phase);
for (int i = 0; i < possibleBoards.size(); i++) {
//see which child is the best choice
v = max(v, alphabeta(possibleBoards.at(i), depth - 1, alpha, beta, 1, position));
//alpha = max(alpha, v);
if (alpha < v) {
alpha = v;
position = possibleBoards.at(i).getPosLastPlaced(2);
}
if (beta <= alpha) {
break; //beta cut - off
}
}
return v; //goes back up to parent node
}
else {
v = INT_MAX;
//generate child nodes
vector<Board> possibleBoards = TreeNode.generateBoard(Player, phase);
for (int i = 0; i < possibleBoards.size(); i++) {
v = min(v, alphabeta(possibleBoards.at(i), depth - 1, alpha, beta, 2, position));
beta = min(beta, v);
if (beta <= alpha) {
break; //alpha cut - off
}
}
return v;
}
}
void NineManMorris::playAIRemove() {
for (int i = 0; i < 24; i++) {
if (gameboard.getBoard(i) == 1) {
//test, just remove first opponent token we see
gameboard.setBoard(i, 0);
break;
}
}
}