class << self
def default_factory
- return swiss_pairing
+ return least_diff_pairing
end
def sort_by_rate_with_randomness
StartGameWithoutHumans.new]
end
+ def least_diff_pairing
+ return [LogPlayers.new,
+ ExcludeSacrificeGps500.new,
+ MakeEven.new,
+ LeastDiff.new,
+ StartGameWithoutHumans.new]
+ end
+
def match(players)
logics = default_factory
logics.inject(players) do |result, item|
end # class << self
+ # Make matches among players.
+ # @param players an array of players, which should be updated destructively
+ # to pass the new list to subsequent logics.
+ #
def match(players)
# to be implemented
log_message("Floodgate: %s" % [self.class.to_s])
end
class SortByRateWithRandomness < Pairing
- def initialize(rand1, rand2)
+ def initialize(rand1, rand2, desc=false)
super()
@rand1, @rand2 = rand1, rand2
+ @desc = desc
end
- def match(players, desc=false)
+ def match(players)
super(players)
cur_rate = Hash.new
players.each{|a| cur_rate[a] = a.rate ? a.rate + rand(@rand1) : rand(@rand2)}
players.sort!{|a,b| cur_rate[a] <=> cur_rate[b]}
- players.reverse! if desc
+ players.reverse! if @desc
log_players(players) do |one|
"%s %d (+ randomness %d)" % [one.name, one.rate, cur_rate[one] - one.rate]
end
rest = players - winners
log_message("Floodgate: Ordering %d winners..." % [winners.size])
- sbrwr_winners = SortByRateWithRandomness.new(800, 2500)
- sbrwr_winners.match(winners, true)
+ sbrwr_winners = SortByRateWithRandomness.new(800, 2500, true)
+ sbrwr_winners.match(winners)
log_message("Floodgate: Ordering the rest (%d)..." % [rest.size])
- sbrwr_losers = SortByRateWithRandomness.new(200, 400)
- sbrwr_losers.match(rest, true)
+ sbrwr_losers = SortByRateWithRandomness.new(200, 400, true)
+ sbrwr_losers.match(rest)
players.clear
[winners, rest].each do |group|
end
end
+ # This pairing algorithm aims to minimize the total differences of
+ # matching players' rates. It also includes penalyties when a match is
+ # same as the previous one or a match is between human players.
+ # It is based on a discussion with Yamashita-san on
+ # http://www.sgtpepper.net/kaneko/diary/20120511.html.
+ #
+ class LeastDiff < Pairing
+ def random_match(players)
+ players.shuffle
+ end
+
+ # Returns a player's rate value.
+ # 1. If it has a valid rate, return the rate.
+ # 2. If it has no valid rate, return average of the following values:
+ # a. For games it won, the opponent's rate + 100
+ # b. For games it lost, the opponent's rate - 100
+ # (if the opponent has no valid rate, count out the game)
+ # (if there are not such games, return 2150 (default value)
+ #
+ def get_player_rate(player, history)
+ return player.rate if player.rate != 0
+ return 2150 unless history
+
+ count = 0
+ sum = 0
+
+ history.win_games(player.player_id).each do |g|
+ next unless g[:loser]
+ name = g[:loser].split("+")[0]
+ p = $league.find(name)
+ if p && p.rate != 0
+ count += 1
+ sum += p.rate + 100
+ end
+ end
+ history.loss_games(player.player_id).each do |g|
+ next unless g[:winner]
+ name = g[:winner].split("+")[0]
+ p = $league.find(name)
+ if p && p.rate != 0
+ count += 1
+ sum += p.rate - 100
+ end
+ end
+
+ estimate = (count == 0 ? 2150 : sum/count)
+ log_message("Floodgate: Estimated rate of %s is %d" % [player.name, estimate])
+ return estimate
+ end
+
+ def calculate_diff_with_penalty(players, history)
+ pairs = []
+ players.each_slice(2) do |pair|
+ if pair.size == 2
+ pairs << pair
+ end
+ end
+
+ ret = 0
+
+ # 1. Diff of players rate
+ pairs.each do |p1,p2|
+ ret += (get_player_rate(p1,history) - get_player_rate(p2,history)).abs
+ end
+
+ # 2. Penalties
+ pairs.each do |p1,p2|
+ # 2.1. same match
+ if (history &&
+ (history.last_opponent(p1.player_id) == p2.player_id ||
+ history.last_opponent(p2.player_id) == p1.player_id))
+ ret += 400
+ end
+
+ # 2.2 Human vs Human
+ if p1.is_human? && p2.is_human?
+ ret += 800
+ end
+ end
+
+ ret
+ end
+
+ def match(players)
+ super
+ if players.size < 3
+ log_message("Floodgate: players are small enough to skip LeastDiff pairing: %d" % [players.size])
+ return players
+ end
+
+ # 10 trials
+ matches = []
+ scores = []
+ path = ShogiServer::League::Floodgate.history_file_path(players.first.game_name)
+ history = ShogiServer::League::Floodgate::History.factory(path)
+ 10.times do
+ m = random_match(players)
+ matches << m
+ scores << calculate_diff_with_penalty(m, history)
+ end
+
+ # Debug
+ #scores.each_with_index do |s,i|
+ # puts
+ # print s, ": ", matches[i].map{|p| p.name}.join(", "), "\n"
+ #end
+
+ # Select a match of the least score
+ min_index = 0
+ min_score = scores.first
+ scores.each_with_index do |s,i|
+ if s < min_score
+ min_index = i
+ min_score = s
+ end
+ end
+ log_message("Floodgate: the least score %d (%d per player) [%s]" % [min_score, min_score/players.size, scores.join(" ")])
+
+ players.replace(matches[min_index])
+ end
+ end
+
end # ShogiServer
$:.unshift File.join(File.dirname(__FILE__), "..")
require 'test/unit'
require 'shogi_server'
+require 'shogi_server/league.rb'
require 'shogi_server/player'
require 'shogi_server/pairing'
require 'test/mock_log_message'
-
def same_pair?(a, b)
unless a.size == 2 && b.size == 2
return false
end
end
+class TestLeastDiff < Test::Unit::TestCase
+
+ class MockLeague
+ def initialize
+ @players = []
+ end
+
+ def add(player)
+ @players << player
+ end
+
+ def find(name)
+ @players.find do |p|
+ p.name == name
+ end
+ end
+ end
+
+ def setup
+ $league = MockLeague.new
+
+ @pairing= ShogiServer::LeastDiff.new
+ $paired = []
+ $called = 0
+ def @pairing.start_game(p1,p2)
+ $called += 1
+ $paired << [p1,p2]
+ end
+
+ @file = Pathname.new(File.join(File.dirname(__FILE__), "floodgate_history.yaml"))
+ @history = ShogiServer::League::Floodgate::History.new @file
+
+ @a = ShogiServer::BasicPlayer.new
+ @a.player_id = "a"
+ @a.name = "a"
+ @a.win = 1
+ @a.loss = 2
+ @a.rate = 500
+ @b = ShogiServer::BasicPlayer.new
+ @b.player_id = "b"
+ @b.name = "b"
+ @b.win = 10
+ @b.loss = 20
+ @b.rate = 800
+ @c = ShogiServer::BasicPlayer.new
+ @c.player_id = "c"
+ @c.name = "c"
+ @c.win = 100
+ @c.loss = 200
+ @c.rate = 1000
+ @d = ShogiServer::BasicPlayer.new
+ @d.player_id = "d"
+ @d.name = "d"
+ @d.win = 1000
+ @d.loss = 2000
+ @d.rate = 1500
+ @e = ShogiServer::BasicPlayer.new
+ @e.player_id = "e"
+ @e.name = "e"
+ @e.win = 3000
+ @e.loss = 3000
+ @e.rate = 2000
+ @f = ShogiServer::BasicPlayer.new
+ @f.player_id = "f"
+ @f.name = "f"
+ @f.win = 4000
+ @f.loss = 4000
+ @f.rate = 2150
+ @g = ShogiServer::BasicPlayer.new
+ @g.player_id = "g"
+ @g.name = "g"
+ @g.win = 5000
+ @g.loss = 5000
+ @g.rate = 2500
+ @h = ShogiServer::BasicPlayer.new
+ @h.player_id = "h"
+ @h.name = "h"
+ @h.win = 6000
+ @h.loss = 6000
+ @h.rate = 3000
+ @x = ShogiServer::BasicPlayer.new
+ @x.player_id = "x"
+ @x.name = "x"
+
+ $league.add(@a)
+ $league.add(@b)
+ $league.add(@c)
+ $league.add(@d)
+ $league.add(@e)
+ $league.add(@f)
+ $league.add(@g)
+ $league.add(@h)
+ $league.add(@x)
+ end
+
+ def teardown
+ @file.delete if @file.exist?
+ end
+
+ def assert_pairs(x_array, y_array)
+ if (x_array.size != y_array.size)
+ assert_equal(x_array.size, y_array.size)
+ return
+ end
+ i = 0
+
+ if (x_array.size == 1)
+ assert_equal(x_array[0].name, y_array[0].name)
+ return
+ end
+
+ ret = true
+ while i < x_array.size
+ if i == x_array.size-1
+ assert_equal(x_array[i].name, y_array[i].name)
+ break
+ end
+ px1 = x_array[i]
+ px2 = x_array[i+1]
+ py1 = y_array[i]
+ py2 = y_array[i+1]
+
+ if ! ((px1.name == py1.name && px2.name == py2.name) ||
+ (px1.name == py2.name && px2.name == py1.name))
+ ret = false
+ end
+ i += 2
+ end
+
+ assert(ret)
+ end
+
+ def test_match_one_player
+ players = [@a]
+ assert_equal(0, @pairing.calculate_diff_with_penalty(players,nil))
+ r = @pairing.match(players)
+ assert_pairs([@a], r)
+ end
+
+ def test_match_two_players
+ players = [@a,@b]
+ assert_equal(@b.rate-@a.rate, @pairing.calculate_diff_with_penalty([@a,@b],nil))
+ assert_equal(@b.rate-@a.rate, @pairing.calculate_diff_with_penalty([@b,@a],nil))
+ r = @pairing.match(players)
+ assert_pairs([@a,@b], r)
+ end
+
+ def test_match_three_players
+ players = [@h,@a,@b]
+ assert_equal(300, @pairing.calculate_diff_with_penalty([@a,@b,@h],nil))
+ assert_equal(2200, @pairing.calculate_diff_with_penalty([@b,@h,@a],nil))
+ r = @pairing.match(players)
+ assert_pairs([@a,@b,@h], r)
+ assert_pairs([@a,@b,@h], players)
+ end
+
+ def test_calculate_diff_with_penalty
+ players = [@a,@b]
+ assert_equal(@b.rate-@a.rate, @pairing.calculate_diff_with_penalty(players,nil))
+
+ dummy = nil
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-a-b-1",
+ :black => "b", :white => "a",
+ :winner => "a", :loser => "b"}
+ end
+ @history.update(dummy)
+ assert_equal(@b.rate-@a.rate+400, @pairing.calculate_diff_with_penalty(players, @history))
+ end
+
+ def test_calculate_diff_with_penalty2
+ players = [@a,@b,@g,@h]
+ assert_equal(@b.rate-@a.rate+@h.rate-@g.rate, @pairing.calculate_diff_with_penalty(players,nil))
+ end
+
+ def test_calculate_diff_with_penalty2_1
+ players = [@a,@b,@g,@h]
+ assert_equal(@b.rate-@a.rate+@h.rate-@g.rate, @pairing.calculate_diff_with_penalty(players,nil))
+ dummy = nil
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-a-b-1",
+ :black => "b", :white => "a",
+ :winner => "a", :loser => "b"}
+ end
+ @history.update(dummy)
+ assert_equal(@b.rate-@a.rate+400+@h.rate-@g.rate, @pairing.calculate_diff_with_penalty(players, @history))
+ end
+
+ def test_calculate_diff_with_penalty2_2
+ players = [@a,@b,@g,@h]
+ assert_equal(@b.rate-@a.rate+@h.rate-@g.rate, @pairing.calculate_diff_with_penalty(players,nil))
+ dummy = nil
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-a-b-1",
+ :black => "g", :white => "h",
+ :winner => "h", :loser => "g"}
+ end
+ @history.update(dummy)
+ assert_equal(@b.rate-@a.rate+400+@h.rate-@g.rate, @pairing.calculate_diff_with_penalty(players, @history))
+ #assert_equal(@b.rate-@a.rate+400+@h.rate-@g.rate+400, @pairing.calculate_diff_with_penalty(players, [@b,@a,@h,@g]))
+ end
+
+ def test_calculate_diff_with_penalty2_3
+ players = [@a,@b,@g,@h]
+ assert_equal(@b.rate-@a.rate+@h.rate-@g.rate, @pairing.calculate_diff_with_penalty(players,nil))
+ dummy = nil
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-a-b-1",
+ :black => "g", :white => "h",
+ :winner => "h", :loser => "g"}
+ end
+ @history.update(dummy)
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-a-b-1",
+ :black => "b", :white => "a",
+ :winner => "a", :loser => "b"}
+ end
+ @history.update(dummy)
+ assert_equal(@b.rate-@a.rate+400+@h.rate-@g.rate+400, @pairing.calculate_diff_with_penalty(players, @history))
+ end
+
+ def test_get_player_rate_0
+ assert_equal(2150, @pairing.get_player_rate(@x, @history))
+
+ dummy = nil
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-x-a-1",
+ :black => "x", :white => "a",
+ :winner => "x", :loser => "a"}
+ end
+ @history.update(dummy)
+ assert_equal(@a.rate+100, @pairing.get_player_rate(@x, @history))
+
+ def @history.make_record(game_result)
+ {:game_id => "wdoor+floodgate-900-0-x-b-1",
+ :black => "x", :white => "b",
+ :winner => "b", :loser => "x"}
+ end
+ @history.update(dummy)
+
+ assert_equal((@a.rate+100+@b.rate-100)/2, @pairing.get_player_rate(@x, @history))
+ end
+end
OSDN Git Service
