- lessons by I. Epshteyn
- endgame columns by N. Elkies
- Chess problems by Christoph Bandelow.
- Chess Problem 1
(retrograde) - Chess Problem 2
(mate in 8) - Problem 3
(mate in 6)
- Chess Problem 1
- Chess problems by Karl Fabel .
- Mathematics and chess
- Odd king tours on an even chessboard
