Rubuta ci gaba don wannan sakin layi - Wani sanannen misali na fashewar e4-e5 wanda ke haifar da harin sarki ya faru a wasan Penrose <unk> Tal daga gasar Olympics ta Leipzig ta 1960
Ka yi haƙuri. Tare da 19.e5! dxe5 20.f5! Bb7 21.Rad1 Ba8 22.Nce4 White ya sanya doki mai ƙarfi a kan e4, yayin da ɓangarorin baƙar fata suka kewaye da pawn a kan e5. Penrose ba da daɗewa ba ya shiga cikin fayil ɗin f-fayil kuma ya sami nasara mai ban mamaki a kan zakaran duniya mai mulki. Sauran misalai na yau da kullum na wannan ci gaba na tsakiya sun hada da Ojanen<unk>Keres, Estonia<unk>Finland wasa, Helsinki 1960