The examples (middlegame, endgame) are usually well analysed and theoretically wise the material is large and frequently updated. If you have any questions while studying the material, let me know and I will help. It is possible to buy it using PayPal and sending payments to email@example.com. Material will be sent in pgn/cbv files directly to your e-mail address.
Today’s offers are:
Ruy Lopez – US$ 20 (instead of US$ 30)
Gruenfeld – US$ 20 (instead of US$ 30)
Catalan – US$ 10 (instead of US$ 25)
10 examples on Piece sacrifice for 2 (3) pawns in the middlegame – US$ 2
10 examples on Q for 3 minor pieces – US$ 2
10 examples on Practical Queen endgames – US$ 2
10 examples on Complicated endgames – US$ 2
If you have any questions about the material, send an e-mail to firstname.lastname@example.org.