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David Navara vs Manfred Keller
Passau op 8th (2000), rd 5, Apr-21
Spanish Game: Morphy Defense. Archangelsk Variation (C78)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
Oct-26-07  Whitehat1963: Manfred killer!
Jul-27-15
Premium Chessgames Member
  patzer2: White's 23. Nf6+! and its followup would make for a good puzzle.

The move 23. Nf6+! ignores a Knight fork threat and instead initiates a deeply calculated and decisive attack on the King.

Fritz initially evaluates it as a weak equalizing move, preferring instead the slightly weaker and more difficult 23. Nd6 Nc2 24. Qe5 Nxe1 25. Nxc8 Nxf3 26. Ne7+ Kh8 27. gxf3 Qa3 28. Kg2 (+1.31 @ 27 depth).

It wasn't until the program reached over 21 depth of search that the evaluation showed White winning after 23. Nf6+! with the follow-up 25. Re5! (+2.67 @ 24 depth, Deep Fritz 14).

Jul-27-15
Premium Chessgames Member
  patzer2: If Black replies to 23. Nf6+ with 23... Kh8 White wins after 24. Nxh7! Kxh7 (24... Nc2 25. Qh4 Nxe1 26. Nf6#; 24... Kg8 25. Nxf8 Rxf8 26. Rac1 ) 25. Qh4+ Kg8 26. Ng5 (mate-in-three or less).
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