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theaigames.com -> go (board game) competition -> starter bot in go (golang)
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| /***************************************************************************** | |
| The MIT License (MIT) | |
| Copyright (c) 2017 Adriano Grieb | |
| Permission is hereby granted, free of charge, to any person obtaining a copy | |
| of this software and associated documentation files (the "Software"), to deal | |
| in the Software without restriction, including without limitation the rights | |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| copies of the Software, and to permit persons to whom the Software is | |
| furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in all | |
| copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| SOFTWARE. | |
| *****************************************************************************/ | |
| /* | |
| This bot simple plays valid random moves, and only this! | |
| It may pass at any time, at random... | |
| It may always pass even if there is a valid move, it doesn't recognize it... | |
| It may fail unexpectedly... ;) | |
| */ | |
| package main | |
| import ( | |
| "bufio" | |
| "bytes" | |
| "math/rand" | |
| "os" | |
| "strconv" | |
| "time" | |
| ) | |
| type settings struct { | |
| timebank int | |
| // Maximum time in milliseconds that your bot can have in its time bank | |
| time_per_move int | |
| // Time in milliseconds that is added to your bot's time bank each move | |
| player_names []byte | |
| // A list of all player names in this match, including your bot's name | |
| your_bot []byte | |
| // The name of your bot for this match | |
| your_botid byte | |
| // The number used in a field update as your bot's chips | |
| field_width int | |
| // The width, i.e. amount of columns, of the field | |
| field_height int | |
| // The height, i.e. amount of rows, of the field | |
| max_rounds int | |
| // The maximum number of rounds the game can last | |
| } | |
| type game struct { | |
| field []byte | |
| // The complete playing field in the current game state | |
| round int | |
| // The number of the current round | |
| move int | |
| // The amount of moves done in the game (including the current move) | |
| bot_points int | |
| // The amount of points in the game the given player currently has | |
| opponent_points int | |
| // The amount of points in the game the given player currently has | |
| last_move_x int | |
| last_move_y int | |
| // The last move given player has performed (given player will be opponent) | |
| } | |
| func main() { | |
| var settings settings | |
| var game game | |
| s := rand.NewSource(time.Now().UnixNano()) | |
| r := rand.New(s) | |
| stdin := bufio.NewScanner(os.Stdin) | |
| for stdin.Scan() { | |
| fields := bytes.Fields(stdin.Bytes()) | |
| if len(fields) == 0 { | |
| os.Stderr.WriteString("input error: no data (empty)\n") | |
| continue | |
| } | |
| switch { | |
| case bytes.Equal(fields[0], []byte("settings")): | |
| parseSettings(&settings, &game, fields[1], fields[2]) | |
| case bytes.Equal(fields[0], []byte("update")): | |
| parseUpdate(&settings, &game, fields[1], fields[2], fields[3:]) | |
| case bytes.Equal(fields[0], []byte("action")): | |
| doAction(&settings, &game, r) | |
| default: | |
| os.Stderr.WriteString("input error: unknown command \"") | |
| os.Stderr.Write(fields[0]) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| } | |
| if err := stdin.Err(); err != nil { | |
| os.Stderr.WriteString("input error: ") | |
| os.Stderr.WriteString(err.Error()) | |
| } | |
| } | |
| func parseSettings(settings *settings, game *game, which, value []byte) { | |
| switch { | |
| case bytes.Equal(which, []byte("timebank")): | |
| settings.timebank, _ = strconv.Atoi(string(value)) | |
| case bytes.Equal(which, []byte("time_per_move")): | |
| settings.time_per_move, _ = strconv.Atoi(string(value)) | |
| case bytes.Equal(which, []byte("player_names")): | |
| settings.player_names = make([]byte, len(value)) | |
| copy(settings.player_names, value) | |
| case bytes.Equal(which, []byte("your_bot")): | |
| settings.your_bot = make([]byte, len(value)) | |
| copy(settings.your_bot, value) | |
| case bytes.Equal(which, []byte("your_botid")): | |
| settings.your_botid = value[0] | |
| case bytes.Equal(which, []byte("field_width")): | |
| settings.field_width, _ = strconv.Atoi(string(value)) | |
| if settings.field_height > 0 { | |
| game.field = make([]byte, settings.field_height*settings.field_width) | |
| } | |
| case bytes.Equal(which, []byte("field_height")): | |
| settings.field_height, _ = strconv.Atoi(string(value)) | |
| if settings.field_width > 0 { | |
| game.field = make([]byte, settings.field_height*settings.field_width) | |
| } | |
| case bytes.Equal(which, []byte("max_rounds")): | |
| settings.max_rounds, _ = strconv.Atoi(string(value)) | |
| default: | |
| os.Stderr.WriteString("input error: unknown setting type \"") | |
| os.Stderr.Write(which) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| } | |
| func parseUpdate(settings *settings, game *game, player, which []byte, | |
| value [][]byte) { | |
| switch { | |
| case bytes.Equal(player, []byte("game")): | |
| switch { | |
| case bytes.Equal(which, []byte("round")): | |
| game.round, _ = strconv.Atoi(string(value[0])) | |
| case bytes.Equal(which, []byte("move")): | |
| game.move, _ = strconv.Atoi(string(value[0])) | |
| case bytes.Equal(which, []byte("field")): | |
| for i, val := range bytes.Split(value[0], []byte(",")) { | |
| if bytes.Equal(val, []byte("-1")) { | |
| game.field[i] = '9' | |
| } else { | |
| game.field[i] = val[0] | |
| } | |
| } | |
| default: | |
| os.Stderr.WriteString("input error: unknown update (game) type \"") | |
| os.Stderr.Write(which) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| case bytes.Equal(player, settings.your_bot): | |
| if bytes.Equal(which, []byte("points")) { | |
| game.bot_points, _ = strconv.Atoi(string(value[0])) | |
| } else { | |
| os.Stderr.WriteString("input error: unknown update (your bot) type \"") | |
| os.Stderr.Write(which) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| case bytes.Contains(player, []byte("player")): | |
| switch { | |
| case bytes.Equal(which, []byte("points")): | |
| game.opponent_points, _ = strconv.Atoi(string(value[0])) | |
| case bytes.Equal(which, []byte("last_move")): | |
| if bytes.Equal(value[0], []byte("place_move")) { | |
| game.last_move_x, _ = strconv.Atoi(string(value[1])) | |
| game.last_move_y, _ = strconv.Atoi(string(value[2])) | |
| } else { | |
| os.Stderr.WriteString("input error: last move: \"") | |
| os.Stderr.Write(value[0]) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| default: | |
| os.Stderr.WriteString("input error: unknown update (opponent) type \"") | |
| os.Stderr.Write(which) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| default: | |
| os.Stderr.WriteString("input error: unknown update player \"") | |
| os.Stderr.Write(which) | |
| os.Stderr.WriteString("\"\n") | |
| } | |
| } | |
| func doAction(settings *settings, game *game, r *rand.Rand) { | |
| move := getRandomMove(settings, game, r) | |
| field := make([]byte, len(game.field)) | |
| copy(field, game.field) | |
| for !hasLiberties(settings, field, move) { | |
| move = getRandomMove(settings, game, r) | |
| } | |
| if move == -1 { | |
| os.Stdout.WriteString("pass\n") | |
| } else { | |
| os.Stdout.WriteString("place_move ") | |
| os.Stdout.WriteString(strconv.Itoa(move % settings.field_width)) | |
| os.Stdout.WriteString(" ") | |
| os.Stdout.WriteString(strconv.Itoa(move / settings.field_height)) | |
| os.Stdout.WriteString("\n") | |
| } | |
| } | |
| func getRandomMove(settings *settings, game *game, r *rand.Rand) int { | |
| movesCount := 0 | |
| for _, val := range game.field { | |
| if val == '0' { | |
| movesCount += 1 | |
| } | |
| } | |
| move := r.Intn(movesCount + 1) | |
| if move != movesCount { | |
| for i, val := range game.field { | |
| if val == '0' { | |
| move -= 1 | |
| if move == 0 { | |
| return i | |
| } | |
| } | |
| } | |
| } | |
| return -1 | |
| } | |
| func hasLiberties(settings *settings, field []byte, pos int) bool { | |
| if pos == -1 { | |
| return true | |
| } | |
| field[pos] = 8 | |
| x := pos % settings.field_width | |
| y := pos / settings.field_height | |
| if x > 0 && field[pos-1] == '0' { | |
| return true | |
| } | |
| if x < settings.field_width-1 && field[pos+1] == '0' { | |
| return true | |
| } | |
| if y > 0 && field[pos-settings.field_width] == '0' { | |
| return true | |
| } | |
| if y < settings.field_height-1 && field[pos+settings.field_width] == '0' { | |
| return true | |
| } | |
| if x > 0 && field[pos-1] == settings.your_botid { | |
| if hasLiberties(settings, field, pos-1) { | |
| return true | |
| } | |
| } | |
| if x < settings.field_width-1 && field[pos+1] == settings.your_botid { | |
| if hasLiberties(settings, field, pos+1) { | |
| return true | |
| } | |
| } | |
| if y > 0 && field[pos-settings.field_width] == settings.your_botid { | |
| if hasLiberties(settings, field, pos-settings.field_width) { | |
| return true | |
| } | |
| } | |
| if y < settings.field_height-1 && | |
| field[pos+settings.field_width] == settings.your_botid { | |
| if hasLiberties(settings, field, pos+settings.field_width) { | |
| return true | |
| } | |
| } | |
| return false | |
| } |
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