Skip to main content
This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (pypi.python.org).
Help us improve Python packaging - Donate today!

CLI to solve combinatoric chess puzzles.

Project Description

CLI to solve combinatoric chess puzzles.

Stable release:

Development:

Motivation

This project started its life as a coding challenge I was asked to solve while interviewing in 2015 for a software engineering position at Uber.

After the interview proccess ended, I kept toying with the code, as a playground to test some optimization strategies in Python. It is now a boilerplate that I use to:

Examples

Simple 3x3 board with 2 kings and a rook:

$ chessboard solve --length=3 --height=3 --king=2 --rook=1
<SolverContext: length=3, height=3, pieces={'rook': 1, 'king': 2, 'queen': 0, 'bishop': 0, 'knight': 0}>
Searching positions...
┌───┬───┬───┐
│ ♚ │   │   │
├───┼───┼───┤
│   │   │ ♜ │
├───┼───┼───┤
│ ♚ │   │   │
└───┴───┴───┘
┌───┬───┬───┐
│   │   │ ♚ │
├───┼───┼───┤
│ ♜ │   │   │
├───┼───┼───┤
│   │   │ ♚ │
└───┴───┴───┘
┌───┬───┬───┐
│ ♚ │   │ ♚ │
├───┼───┼───┤
│   │   │   │
├───┼───┼───┤
│   │ ♜ │   │
└───┴───┴───┘
┌───┬───┬───┐
│   │ ♜ │   │
├───┼───┼───┤
│   │   │   │
├───┼───┼───┤
│ ♚ │   │ ♚ │
└───┴───┴───┘
4 results found in 0.03 seconds.

Famous eight queens puzzle, without printing the solutions to speed things up:

$ chessboard solve --length=8 --height=8 --queen=8 --silent
<SolverContext: length=8, height=8, pieces={'rook': 0, 'king': 0, 'queen': 8, 'bishop': 0, 'knight': 0}>
Searching positions...
92 results found in 119.87 seconds.

Huge combinatoric problem can take some time to solve:

$ chessboard solve --length=7 --height=7 --king=2 --queen=2 --bishop=2 --knight=1 --silent
<SolverContext: length=7, height=7, pieces={'rook': 0, 'king': 2, 'queen': 2, 'bishop': 2, 'knight': 1}>
Searching positions...
3063828 results found in 9328.33 seconds.

The CLI allow the production of a profiling graph, to identify code hot spots and bottleneck:.

$ chessboard solve --length=6 --height=6 --king=2 --queen=2 --bishop=2 --knight=1 --silent --profile
<SolverContext: length=6, height=6, pieces={'rook': 0, 'king': 2, 'queen': 2, 'bishop': 2, 'knight': 1}>
Searching positions...
23752 results found in 207.25 seconds.
Execution profile saved at /home/kevin/chessboard/solver-profile.png

Third-party

This project package’s boilerplate is sourced from the code I wrote for Scaleway’s postal-address module, which is published under a GPLv2+ License.

The CLI code is based on the one I wrote for the kdenlive-tools module, published under a BSD license.

Changes for v1.5.4 (2017-08-11)

  • Show selected log level in debug mode.
  • Drop support and unittests on Mac OS X 10.9.
  • Add new macOS 10.12 target for Travis CI builds.
  • Bump requirement to readme_renderer >= 16.0.
  • Move installation instructions to documentation.
  • Move performance page to documentation.
  • Move CLI usage to own section in docs.
  • Activate unittests in Python 3.6.
  • Show environment variables in Travis jobs for debugging.
  • Check there is no conflicting dependencies in Travis jobs.
  • Show the graph of package dependencies in documentation.
  • Fix upgrade of setuptools in macOS + Python 3.3 Travis jobs.

Full changelog.

Release History

Release History

This version
History Node

1.5.4

History Node

1.5.3

History Node

1.5.2

History Node

1.5.1

History Node

1.5.0

History Node

1.4.0

History Node

1.3.0

History Node

1.2.0

History Node

1.1.0

History Node

1.0.0

History Node

0.9.1

History Node

0.9.0

History Node

0.8.0

History Node

0.7.0

History Node

0.6.0

History Node

0.5.0

History Node

0.4.0

History Node

0.3.0

History Node

0.2.1

History Node

0.2.0

History Node

0.1.1

History Node

0.1.0.dev0

Download Files

Download Files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
chessboard-1.5.4-py2.7.egg (24.9 kB) Copy SHA256 Checksum SHA256 2.7 Egg Aug 11, 2017
chessboard-1.5.4-py2.py3-none-any.whl (29.0 kB) Copy SHA256 Checksum SHA256 2.7 Wheel Aug 11, 2017
chessboard-1.5.4.tar.gz (226.4 kB) Copy SHA256 Checksum SHA256 Source Aug 11, 2017

Supported By

WebFaction WebFaction Technical Writing Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Rackspace Rackspace Cloud Servers DreamHost DreamHost Log Hosting