Sunday morning’s 5-second tactics!

“In any moment of decision, the best thing you can do is the right thing. The worst thing you can do is nothing.”
Theodore Roosevelt
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fm Adair,J (2440)

gm Sadler,M
Saturday’s round of the 4NCA (British Team Championship). Position before Black’s 23rd move. As with most isolated-QP positions, the game is tense and both sides have chances, but precision and attention to details is required. Here Black should probably play the probing 23…Bg4!?. It is still anybody’s game…
23…Nf6?!

Solid, but not in the spirit of the position! Besides, it loses!
WHITE TO PLAY AND WIN!
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gm McNab,C
gm Short,N
Also the 4NCL yesterday. Position after 18 moves. Short has a classic attack against the Kingside. But notice the Knight on d5 also: White dominates the board!
WHITE TO PLAY AND CRUSH BLACK!
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4NCL 2014.5.3 Sadler, Matthew D–Adair, James R: 24.Nxg6! hxg6 25.Rxe6!! Black can not capture because after 25…fxe6 26.Qxg6+ Kf8 27.Qxf6+ Kg8 28.Re5 it is going to be mate . In the game continuation Black decided to limit his loss to a pawn (an important pawn!) and Sadler had no great difficulties in bringing home the point: 26.R6e2 Rcd6 27.Bf3 a5 28.Kg2 Kg7 29.Rc2 Qb3 30.Rd2 b5 31.Qd4 b4 32.cxb4 axb4 33.Re3 Qc4 34.axb4 Qxd4 35.Rxd4 Rb8 36.Be2 Rc6 37.Rc3 Rxc3 38.bxc3 Ne4 39.Rd3 Rc8 40.Rxd5 Rxc3 41.Bf3 Nf6 42.Rd4 Ne8 43.b5 Rb3 44.Bc6 1-0
4NCL 2014.5. Short, Nigel D–McNab, Colin A: 19.Nf5!! A strong positional sacrífice that paralyzes Black. 19…gxf5 No choice here. The threat was a Knight check, and if 19…Rf7 then 20.f4! Knight-moves 21.Bc4 etc. 20.gxf5 Qf7 21.Rhg1+ Ng7 22.f4 Kh8 23.fxe5 dxe5 24.Ne3 Bb7 25.Bc4 Qe7 26.Rg4 Ne8 27.Rd7! 1-0