ChineseChess（中文点这里）
Chinese Chess - A Free iOS App（C & Obj-C & Swift）
- 2017.10.11, right start the project.
- 2018.2.24, done with MultiPeer module, begin developing AI.
- support AI vs Human, you can select AI's level.（now AI is developing, using PVS）
- support immediate regret, new game or new settings.
- support reverse the board, opposite the chesses.
- support turn on/off the background music.
- support clear and reset the board.
- support remove/put a chess on a legal grid.
- support load a history.
- support history read, save, delete.
- support select a step and immediatly jump to the specific position.
- support jump to Game Module to play a game.
- support two people's game through the bluetooth or LAN.
- support regret, draw, give up.
- support start a new game.
Overview Of AI（Refer to scholar Morning Yellow's blog）
- Long check or long catch will lead to lose.
- Both of side have no chess can attack will lead to draw.
- 50 rounds of moves have no eat will lead to draw.
- Same position appears many times will lead to draw.
- Board: an array, the length of it is 256.
- Chess: red is from 16 to 31, rank like King, Advisor, Advisor, Bishop, Bishop, Knight, Knight, Rook, Rook, Cannon, Cannon, Pawn, Pawn, Pawn, Pawn, Pawn, black is from 32 to 47, the same as red.
- Short Type: King, Advisor, Bishop, Knight, Pawn, previous generate move array.
- Long Type: Rook, Cannon, bit row bit column.
- Pre Evaluate: Analysis the status of position, judging whether the position is in the middle or the end, the value of different status is different.
- Dynamic Evaluate: Called when search at the leaf node of PVS, include two parts, one is location-chess value, another is dynamic evaluate, it includes the punishment of lack advisor or bishop, the control, hold, protection of knight, the hold, protection, threat, flexibility of rook and cannon, and the hollow cannon to the king (it means there's nothing between cannon and king).
- Hit The Target: Before searching, refer the vault to get the move, if do hit the target, it can return, or AI will begin searching. By the way, it can be not the exact position in the vault, it can be left-right mirrored, red-black mirrored, 4 position will be searching totally.
- Expand The Vault: There are two kinds of record files, whitch depends on whether the each step contains FEN string or not. If that, it can be used to expand the vault. We can input many games to enhance the power of AI. Following the steps, 1. [LunaRecordStack historyFileWithCode:YES]; 2. [LunaRecordVault expandVaultWithDirectory:@"the directory of record files"]; 3. [LunaRecordVault writeToFile:@"the path of saved vault"];