Yes the fortress is very difficult to achieve. Storm has managed it, and in a game against George Miller I attempted it but failed to see a capture threat, he took my piece leaving me with only 3 spare white pieces :(
(скрий) Ако искате да намерите противник с близки до Вашите умения, отворете страница "Рейтинги" за съответния тип игра и потърсете някой с BKR близко до вашия. (pauloaguia) (покажи всички подсказки)