John McKellar is a chess instructor based in California who publishes a
series of problems online, usually every two to three weeks. A valid stu-
dent code is required to register a score. Hyperlinks appearing on this
website may lead to other sites not under control of the author. Ques-
tions or comments regarding this site can be directed to:
jamckellar@icloud.com.

This website uses software under MIT License available to the public
from https://chessboardjs.com, legal terms of which are described as
follows.

Copyright 2019 Chris Oakman

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 AU-
THORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAM-
AGES 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.