experimentation script

bin/brute_force.rb

@@ -0,0 +1,114 @@
+##
+# Hacked together script of experimentation
+# Left here for posterity
+#
+module Spades
+  def self.winner(trick)
+    trick.sort.last
+  end
+
+  def self.next_play(hand)
+    hand.sort!
+    hand.each do |card|
+      return card if card.value > 0
+    end
+    return hand.first
+  end
+
+  class Card
+    include Comparable
+
+    RANKS = {
+      'j' => 11,
+      'q' => 12,
+      'k' => 13,
+      'a' => 14
+    }
+    SUITS = {
+      'c' => 1,
+      'h' => 0,
+      'd' => 0,
+      's' => 10
+    }
+
+    attr_reader :rank, :suit
+
+    def initialize(card)
+      @rank, @suit = card.downcase.split('')
+    end
+
+    def <=>(other)
+      return value <=> other.value
+    end
+
+    def value
+      numeric_rank * numeric_suit
+    end
+
+    def numeric_rank
+      RANKS[rank] || rank.to_i
+    end
+
+    def numeric_suit
+      SUITS[suit]
+    end
+
+    def to_s
+      "#{@rank}#{@suit}"
+    end
+
+  end
+end
+
+
+if $0 == __FILE__
+  c2 = Spades::Card.new('2c')
+  c3 = Spades::Card.new('3c')
+  played = 0
+  won = 0
+  all_clubs = 0
+  deck = [
+    Spades::Card.new('2c'),
+    Spades::Card.new('3c'),
+    # Spades::Card.new('4c'),
+    Spades::Card.new('2h'),
+    Spades::Card.new('3h'),
+    # Spades::Card.new('4h'),
+    Spades::Card.new('2d'),
+    Spades::Card.new('3d'),
+    # Spades::Card.new('4d'),
+    Spades::Card.new('2s'),
+    Spades::Card.new('3s'),
+    # Spades::Card.new('4s')
+  ]
+  deck.combination(2) do |hand1|
+    (deck - hand1).combination(2) do |hand2|
+      (deck - hand1 - hand2).combination(2) do |hand3|
+        hand4 = deck - hand1 - hand2 - hand3
+        if hand1.sort == [c2, c3] or hand2.sort == [c2, c3] or hand3.sort == [c2, c3] or hand4.sort == [c2, c3]
+          all_clubs += 1
+        end
+        played += 1
+        trick = []
+        trick << Spades.next_play(hand1)
+        trick << Spades.next_play(hand2)
+        trick << Spades.next_play(hand3)
+        trick << Spades.next_play(hand4)
+        if Spades.winner(trick) == c3
+          puts "hand1: #{hand1}"
+          puts "hand2: #{hand2}"
+          puts "hand3: #{hand3}"
+          puts "hand4: #{hand4}"
+          puts "trick: #{trick}"
+          puts
+          won += 1
+        end
+      end
+    end
+  end
+  puts "\n"
+  puts won
+  puts played
+  puts won.to_f / played
+  puts all_clubs
+end