Thank you!

Chesstempo would not be possible without the hard work of many people. This includes translators, third party software providers, artwork and sounds that the site relies on.

Translators

Open source software

Chesstempo pages include the work of several open source projects. Please see the list of software and licenses here.

The Week in Chess (TWIC)

Mark Crowther has been working tirelessly for many years on producing his weekly collection of game scores from major tournaments around the world. Without Mark's work - which he distributes on the internet for free - our game database would be significantly smaller.

Mark provides live tournament coverage , chess news, and many other worthwhile services on theweekinchess.com.

Piece images

The Belladonna, Amarena, Padre, Cielo, Ebony and Ivory, Letters, Cardinal, Gioco, Governor, Maestro, and Staunty pieces were all created by Sad Knight. The latter 5 were first available on lichess, and provided by Sad Knight directly to Chesstempo under a different license. Sad Knight also provided the SVG version of Armando H. Marroquín's Condal set and created several new board images, including the Porcelain Green, Glass Orange, Marble Green 2, Marble Red, Mint, Blue Plastic, Wood Pine 2, Wood Cherry Maple and Wood Walnut boards. You can follow Sad Knight on instagram.
The Kosal piece set was created by Philatype, see https://github.com/philatype/kosal/ and Philatype's page at https://www.philatype.com
The Celtic, Eyes, Fantasy, Spatial and Skulls chess pieces were created by Maurizio Monge - see https://github.com/maurimo/chess-art
The Wiki chess set was created by Colin Burnett (Details at Colin's wikipedia page).
Thanks to Eric Bentzen for permission to use the Berlin and Alpha chess pieces, and to Felix Kling for allowing us to use his shaded Merida and Good Companion chess pieces
Another thank you to Gorgonian who supplied SVG versions of several piece sets. You can see more of his work at Gorgonian's chess site
Other chess piece attributions go to Armando H. Marroquín (Condal, Kingdom, Leipzig, Merida), Matthieu Leschemelle (Case) and David L. Brown (Good Companion).

Other images

Blog images

Mistake
Endgame image - Photo by Piotr Makowski on Unsplash
Book image - Icon from Fabián Alexis

Board textures

Most of the textures used to display the board squares are supplied by either Spiral Graphics Inc. or CG Textures.

Game Icons - game-icons.net

Run Badge

Twitter Icons

Diamond icon by https://twitter.com/ is licensed under CC BY 4.0

Unsplash.com Images

Book shelf books - Photo by Alfons Morales on Unsplash

Noun Project - thenounproject.com

Tick - Check by Lloyd Humphreys from the Noun Project
Streak badge - counting by Magicon from the Noun Project
Streak badge 2 - Fire by Hello Many from the Noun Project
Upset badge - scales by Sergey Demushkin from the Noun Project
All time high badge - champion by Nicolas Vicent from the Noun Project
Total time badge - Total Time by Prasad Ghone from the Noun Project
Calendar total badge - Calendar by Simple Icons from the Noun Project
Comment Like badge - comment by Sergey Demushkin from the Noun Project
Material search badge - Chess by Juan Pablo Bravo from the Noun Project
Endgame symbol - Chess by EliRatus from the Noun Project
Play chess symbol - board game by Piotrek Chuchla from the Noun Project
GTM symbol - Question Mark Pawn by Till Teenck from the Noun Project
Blitz Symbol - Lightning Bolt by Cezary Rudaś from the Noun Project
Bullet Symbol - Bullet by Lucid Formation from the Noun Project
Rapid Symbol - Stopwatch by Ilsur Aptukov from the Noun Project
Long Symbol - Snail by aLf from the Noun Project
Correspondence Symbol - envelope by Arthur Shlain from the Noun Project
Mixed symbol - combine by Stephen Plaster from the Noun Project
Theory symbol - Book by Ryzhkov Anton from the Noun Project
Practice symbol - evacuation by Arthur Shlain from the Noun Project
Hour symbol - timing by Hugo Heneault from the Noun Project
Day symbol - One Day by Muneer A.Safiah from the Noun Project
Week symbol - One Week by Muneer A.Safiah from the Noun Project
Month symbol - One Month by Muneer A.Safiah from the Noun Project
Year symbol - Candle by Pham Thi Dieu Linh from the Noun Project
All Time High Rating - Graph by Simple Icons from the Noun Project
Add favourite - Heart by Oleg Frolov from the Noun Project
Rating Range - range by Arthur Shlain from the Noun Project
Attempt filter - Repeat by Arthur Shlain from the Noun Project
Motif filter - strategy by Garrett Knoll from the Noun Project
Opening filter - Data Filter by Andrew Forrester from the Noun Project
Board Setup - Tactics Based by Till Teenck from the Noun Project
Load Game PGN - Load by Mundo from the Noun Project
Training Target - goal by Dima Lagunov from the Noun Project
Gold Membership - gold by Creative Stall from the Noun Project
Diamond Membership - Diamond by Numero Uno from the Noun Project
CPU Threads - CPU by icon 54 from the Noun Project
Run Badge - Runner by Em L from the Noun Project
Tactical Wizard - Wizard by Wes Breazell from the Noun Project
Einstein - Einstein by Roman Rusinov from the Noun Project
Guru - Guru by Jasmine White from the Noun Project
Prodigy - Brain by Blake Ferguson from the Noun Project
Steamroller - Steamroller by Mike Ashley from the Noun Project
Tactical Monster - Monster by Joel McKinney from the Noun Project
Opening Beast - bigfoot by Mat Rutherford from the Noun Project
Opening Master - Yoga Master by Symbolon from the Noun Project
Opening Symbol - Book by Julia Simplicio from the Noun Project
Opening Star - Star by kareemovic from the Noun Project
Ninja - Ninja by Jonathan Gibson from the Noun Project
Raptor - raptor by Raf Verbraeken from the Noun Project
Underdog - Dog by Isabel Foo from the Noun Project
Time bomb - Time Bomb by Mister Pixel from the Noun Project
Time Flies - Time Flies by Andreas Wikström from the Noun Project
Time Lord - Tardis by Arancha R from the Noun Project
Time Warp - Black Hole by Rohit Arun Rao from the Noun Project
Mountain Climber - Mountain Climber by Juan Pablo Bravo from the Noun Project
Finish Line - finish line by Luis Prado from the Noun Project
Endgame Feature Icon - Chess by Creative Stall from the Noun Project
Tactics Feature Icon - Target by Ricardo Moreira from the Noun Project
Database Feature Icon - database by Rockicon from the Noun Project
Play online Feature Icon - chess move by icon 54 from the Noun Project
GTM Feature Icon - problem by Gregor Črešnar from the Noun Project
Serve Icon - Waiter by Creative Stall from the Noun Project
Resign Icon - Checkmate by Luis Prado from the Noun Project
Add Image - Add photo by Alice Design from the Noun Project
Motifs image - Tactics by Vectors Point, PK from the Noun Project
Chess book with board - strategy by corpus delicti from the Noun Project
Book edit - books cover editing by Maxicons from the Noun Project
Book Brain - knowledge by Eucalyp from the Noun Project
Solution icon - solution by Adrien Coquet from the Noun Project
E-learning icon - e learning by Mello from the Noun Project

Sounds

Wikipedia

The mate names in our list of named checkmates was initially inspired by the list at https://en.wikipedia.org/wiki/Checkmate_pattern. We are proud to see that several of the mate names suggested by our users (in particular interlist), and seen for the first time on Chesstempo have since made their way onto the Wikipedia list of checkmate patterns.

Inspirations

Sometimes we see ideas on other sites that have inspired features on Chesstempo. This section lists some of these.

Chess Tactics Server (aka chess.emrald.net) - Now no longer available, CTS was the first place we know of to implement the idea of rating chess puzzles via a chess rating system by treating solving activity in the same way as matches between players. Work on Chesstempo was already well progressed when we first became aware of CTS (which predated CT by several years), but we hadn't finalised our scoring and difficulty grading system. Upon seeing how elegantly CTS's rating system worked, we borrowed the idea of treating puzzles and human solvers as opponents. Implementing our own version for use on Chesstempo, we supplemented CTS's timed solving with an untimed mode, and thus "blitz" and "standard" modes on Chesstempo were born. CTS was developed by members of the Berlin based SG Hermsdorf chess club (now part of the SK CAÏSSA & Spielgemeinschaft Hermsdorf club).

Premium members

The generosity of premium members has helped fund the development work that has made Chesstempo what it is today. Thank you to all those who have contributed financially, your support is very much appreciated.