▁which ▁Ale kh ine ▁forms ▁the ▁gun ) ▁R bc 8 ▁ 2 7 . ▁Ba 4 ▁( th re aten ing ▁ 2 8 . b 5 , ▁winning ▁the ▁p inned ▁kn ight ) ▁b 5 ▁ 2 8 . ▁B x b 5 ▁Ke 8 ▁ 2 9 . ▁Ba 4 ▁K d 8 ▁( guard ing ▁c 7 , ▁so ▁that ▁the ▁kn ight ▁can ▁move ▁away ▁on ▁ 3 0 . b 5 ) ▁ 3 0 . ▁h 4 ▁( but ▁now ▁all ▁Black ' s ▁pieces ▁are ▁committed ▁to ▁the ▁defence ▁against ▁the ▁gun , ▁and ▁he ▁is ▁running ▁out ▁of ▁moves ) ▁h 5 ▁ 3 1 . ▁Kh 2 ▁g 6 ▁ 3 2 . ▁g 3 ▁( zug zw ang ) ▁ ▁Other ▁games ▁Six ▁years ▁later , ▁in ▁ 1 9 3 6 , ▁Ale kh ine ▁defeated ▁William ▁Winter ▁using ▁Ale kh ine ' s ▁gun ▁again . ▁ ▁Since ▁then , ▁players ▁have ▁learned ▁much ▁about ▁using ▁and ▁guard ing ▁against ▁this ▁formation ; ▁however , ▁some ▁international ▁games ▁are ▁still ▁lost ▁or ▁won ▁by ▁the ▁force ▁of ▁this ▁t actic . ▁In ▁November ▁ 2 0 1 8 ▁it ▁was ▁successfully ▁used ▁by ▁Ju ▁W en j un ▁against ▁Kat ery na ▁Lag no ▁in ▁game ▁ 4 ▁of ▁the ▁F IDE ▁Women ' s ▁World ▁Championship . ▁The ▁attack ▁could ▁have ▁been ▁ref uted ▁with ▁perfect ▁defense , ▁but ▁Lag no ▁was ▁unable ▁to ▁find ▁it ▁and ▁res