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:
Four Knights – US$ 10 (instead of US$ 20)
Ruy Lopez – US$ 20 (instead of US$ 30)
Pirc + Modern – US$ 20 (instead of US$ 30)
10 examples on “Inactive” Rook – US$ 2
10 examples on Rook sacrifice Rxg2 – US$ 2
10 examples on Zugzwang – US$ 2
10 examples on Rook versus pawns – US$ 2
If you have any questions about the material, send an e-mail to firstname.lastname@example.org.