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Description:

pythonshogi 1.1.1

Introduction
This is the module for shogi written in Pure Python. It’s based on python-chess commit
This is the scholars mate in python-shogi:
>>> import shogi

>>> board = shogi.Board()

>>> board.push(shogi.Move.from_usi('7g7f'))

>>> board.push_usi('3c3d')
Move.from_usi('3c3d')
>>> board.push_usi('8h2b+')
Move.from_usi('8h2b+')
>>> board.push_usi('4a5b')
Move.from_usi('4a5b')
>>> board.push_usi('B*4b')
Move.from_usi('B*4b')
>>> board.push_usi('5a4a')
Move.from_usi('5a4a')
>>> board.push_usi('2b3a')
Move.from_usi('2b3a')
>>> board.is_checkmate()
True

Features

Supports Python 3.3+.
Supports standard shogi (hon shogi)
Legal move generator and move validation.
>>> shogi.Move.from_usi("5i5a") in board.legal_moves
False

Make and unmake moves.
>>> last_move = board.pop() # Unmake last move
>>> last_move
Move.from_usi('2b3a')

>>> board.push(last_move) # Restore

Show a simple ASCII board.
>>> print(board)
l n s g . k +B n l
. r . . g B . . .
p p p p p p . p p
. . . . . . p . .
. . . . . . . . .
. . P . . . . . .
P P . P P P P P P
. . . . . . . R .
L N S G K G S N L
<BLANKLINE>
S*1

Show a KIF style board.
>>> print(board.kif_str())
後手の持駒：
９８７６５４３２１
+---------------------------+
|v香v桂v銀v金・v玉馬v桂v香|一
| ・v飛・・v金角・・・|二
|v歩v歩v歩v歩v歩v歩・v歩v歩|三
| ・・・・・・v歩・・|四
| ・・・・・・・・・|五
| ・・歩・・・・・・|六
| 歩歩・歩歩歩歩歩歩|七
| ・・・・・・・飛・|八
| 香桂銀金玉金銀桂香|九
+---------------------------+
先手の持駒：　銀

Detects checkmates, stalemates.
>>> board.is_stalemate()
False
>>> board.is_game_over()
True

Detects repetitions. Has a half move clock.
>>> board.is_fourfold_repetition()
False
>>> board.move_number
8

Detects checks and attacks.
>>> board.is_check()
True
>>> board.is_attacked_by(shogi.BLACK, shogi.A4)
True
>>> attackers = board.attackers(shogi.BLACK, shogi.H5)
>>> attackers
SquareSet(0b111000010000000000000000000000000000000000000000000000000000000000000000000000)
>>> shogi.H2 in attackers
True
>>> print(attackers)
. . . . . . . . .
. . . . . . . . .
. . . . . . . . .
. . . . . . . . .
. . . . . . . . .
. . . . . . . . .
. . . . . . . . .
. . . . . . . 1 .
. . . 1 1 1 . . .

Parses and creates USI representation of moves.
>>> board = shogi.Board()
>>> shogi.Move(shogi.E2, shogi.E4).usi()
'2e4e'

Parses and creates SFENs
>>> board.sfen()
'lnsgkgsnl/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/LNSGKGSNL b - 1'
>>> board.piece_at(shogi.I5)
Piece.from_symbol('K')

Read KIFs.
>>> import shogi.KIF

>>> kif = shogi.KIF.Parser.parse_file('data/games/habu-fujii-2006.kif')[0]

>>> kif['names'][shogi.BLACK]
'羽生善治'
>>> kif['names'][shogi.WHITE]
'藤井猛'
>>> kif['moves'] # doctest: +ELLIPSIS, +NORMALIZE_WHITESPACE
['7g7f',
'3c3d',
...,
'9a9b',
'7a7b+']
>>> kif['win']
'b'

Export to KIFs.
>>> import shogi
>>> import shogi.KIF

>>> board = shogi.Board()
>>> shogi.KIF.Exporter.kif_move_from('7g7f', board)
'７六歩(77)'

>>> sfen_summary = {'moves': ['7g7f', '3c3d'], 'sfen': 'lnsgkgsnl/1r5b1/ppppppppp/9/9/9/PPPPPPPPP/1B5R1/LNSGKGSNL b - 1', 'names': ['羽生善治', '藤井猛'], 'win': 'w'}
>>> shogi.KIF.Exporter.kif(sfen_summary)
開始日時： \r
終了日時： \r
手合割：平手\r
先手：羽生善治\r
後手：藤井猛\r
手数----指手---------消費時間-- \r
1 ７六歩(77) \r
2 ３四歩(33) \r
3 投了 \r
まで2手で後手の勝ち\r

Communicate with a CSA protocol.
Please see random_csa_tcp_match.

Parse professional shogi players’ name

>>> import shogi.Person

>>> shogi.Person.Name.is_professional('羽生　善治名人・棋聖・王位・王座')
True

Performance
python-shogi is not intended to be used by serious shogi engines where
performance is critical. The goal is rather to create a simple and relatively
highlevel library.
You can install the gmpy2 or gmpy modules
in order to get a slight performance boost on basic operations like bit scans
and population counts.
python-shogi will only ever import very basic general (non-shogi-related)
operations from native libraries. All logic is pure Python. There will always
be pure Python fallbacks.

Installing

With pip:
pip install python-shogi

How to test
> make test
If you want to print lines from the standard output, execute nosetests like following.
> poetry run nosetests -s

How to release
poetry config repositories.testpypi https://test.pypi.org/legacy/
# poetry config pypi-token.testpypi "Test PyPI API Token"
make test-upload
# poetry config pypi-token.pypi "PyPI API Token"
make upload

ToDo

Support board.generate_attacks() and use it in board.is_attacked_by() and board.attacker_mask().
Remove rotated bitboards and support Shatranj-style direct lookup like recent python-chess.
Support %MATTA etc. in CSA TCP Protocol.
Support board.is_pinned() and board.pin().