class ConnectNGame::Prudent

The Prudent bot picks the move with the highest score.

Public Class Methods

new(name = "Prudent") click to toggle source

Build the player

Calls superclass method ConnectNGame::Player::new
# File lib/connect_n_game/players/prudent.rb, line 9
def initialize(name = "Prudent")
  super(name, "Minimum tactical analysis with some defense.", :silicon)
end

Public Instance Methods

check_opponent(rack, piece) click to toggle source

Check for the opponent's best moves at this level

# File lib/connect_n_game/players/prudent.rb, line 41
def check_opponent(rack, piece)
  threshold = rack.order - 1
  result = 0

  (1..rack.width).each do |channel|
    score = rack.score_move(channel, piece)
    score *= 2 if score > threshold
    result += score if score >= threshold
  end

  result
end
losers_comments() click to toggle source

The agony of defeat

# File lib/connect_n_game/players/prudent.rb, line 60
def losers_comments
  "#{name} says 'How could I have missed this?'"
end
make_move(game, piece) click to toggle source

Make a move. This bot picks the move with the highest score.
Parameters

  • game - the game being played.

  • piece - the piece to be played, 1 or 2.


Returns

  • A move, 1 .. rack.width

# File lib/connect_n_game/players/prudent.rb, line 19
def make_move(game, piece)
  #Compute the moves of the first ply.
  first_ply = (game.rack.weights.each_with_index.map do |weight, index|
    channel = index + 1
    [weight + game.rack.score_move(channel, piece), channel]
  end).sort.show_weights("Scan 1")

  #If we're done, stop.
  return first_ply.last[1] if first_ply.last[0] >= game.rack.order

  #Factor in the behavior of the opponent.
  (0...(first_ply.length)).each do |index|
    copy = game.rack.clone.deep_clone

    copy.rack[first_ply[index][1]-1] << piece
    first_ply[index][0] -= check_opponent(copy, (piece % 2) + 1)
  end

  first_ply.sort.show_weights("Scan 2").last[1]
end
winners_comments() click to toggle source

The thrill of victory.

# File lib/connect_n_game/players/prudent.rb, line 55
def winners_comments
  "#{name} says 'Good moves must give way to better!'"
end