

This week's Canadian Tactic comes from the last round of the 2014 Reykjavik Open. Daniel Kazmaier is White against a Women's GM and has sacrificed a N to expose the Black King. White's immediate threat is Nc5+ winning the Nc6.
What should Black play?
Hint: consider these three moves:
25...Nc4
25...Rfc8
25...Nxd4
Not this one...
Black can concede that she can't save the Nc6 and try to get something for it, but ...Nxd4 doesn't save the game or her King:
25...Nxd4 26.Nc5+ Ke8 27.Rxd4! (27.Qxd6 +-) 27...Qxd4 28.Qc6+ Kf7 29.Qd7+ Kf6 30.Rxe6+ Kf5 31.Rxd6+ Be6 32.Qxe6#.
This one...
25...Nc4 Best, but Black's position is still bad. 26.Nc5+ Kd6 27.Ne4+!
27.Nb7+ Kd7 28.Nc5+ repeats.
27... dxe4 28.Qc5+ Kd7 (or Kc7) 29.Bxe4 +/- White wins one of the the Ns and has three pawns for the piece and a continuing initiative.
The game concluded:
25...Rfc8? 26.Bxd5! +-
If Black takes the B then her King can't use the d-file, and 27.Nc5#.
26.Nc5+ is not as convincing: 26... Ke7 27.Bxd5 Rab8 28.Qa6 Ra8 29.Qd3 Nb4 30.Qb3 with a continuing attack.
26...Qd8 27.Bxc6+ Rxc6 28.Nc5+ (only move) Rxc5 29.Qxd8+!
1-0
After 29.Qxd8+ Rxd8 30.dxc5 White will soon be up an exchange and two pawns.
from the game:
Daniel Kazmaier [CAN] - WGM Jovana Vojinovic [SRB]
Reykjavik Open
2014.03.12
For the full game, and many other Canadian games from Gibraltar and Reykjavik, see the 2014.03 CCN.