Today’s 5-second chess tactics

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Huynh, Arthur
gm Vajda, Levente
Sydney Open, Austrália, just the other day. Position after 18 moves. Black had just played 18…Bd7, connecting his Rooks and almost completing his mobilization. Unfortunately, his sense of danger was not yet connected ….
WHITE TO PLAY AND WIN!
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wgm Hoang, Thi Bao Tram
wgm Sukandar, Irine Kharisma
Asian Continental (w) in the UAE just the other day. Position after Black’s 17th move (16…Qc6) threatening mate in one move. Unfortunately for Black, White has designs of his own.
WHITE TO PLAY AND WIN!
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Sydney Open 2014 2014.4.23 Vajda, Levente–Huynh, Arthur: 19.Nh2 !1-0 Retreating moves are always the hardest to see, for some reason. White’s 19th move escaped Black’s attention . He would now lose the Queen after 19…Qh5 20.Be2; and if instead 19…Qf5 then 20.g4 does the same thing. So resigning is fully understandable…
Asian Continental ,Sharjah UAE, 2014.4.23 Sukandar, Irine Kharisma–Hoang, Thi Bao Tram:17.Nxf6+ Bxf6 18.Be4! The first key to understanding the position. 18… Qc5 19.Bxh7+! The final point. 19… Kxh7?! Better 19…Kh8, but White is still winning after 20.Bxf6 The game concluded with a mating attack: 20.Qh5+ Kg8 21.Rh4 1-0