Calculation Errors: The Ghost Piece

Calculation Errors: The Ghost Piece

blohmoremoney
blohmoremoney
Aug 14, 2015, 7:41 PM |
0

In my daily tactical training I made a calculation mistake which is very instructional (and embarassing).

 

Blokh Combinational Motives: Diagram 717 Difficulty 5, White to move.

 








 

Here I spotted a thematic sacrifice on f7 and a way to win two pawns.

 

I calculated 1. Bxf7+ Kxf7 2. Nxe5+ Qxe5 3. Bxe5 Bxe2 4. Bxe2

 

There was only one problem with this ... I no longer have a bishop on c4 to play Bxe2.


I call this a "Ghost Piece" ... where you lose track of the pieces on the board when calculating variations. Be on the guard against this

 

Can you solve?

 

 
Why does this work?
 
* f7 is only guarded by the Black King ... alarm bells should go off regarding potential sacrifiaces
* Weakness at e5: attacked twice by White and defended once
* White's control of the a2-g8 diagonal
* The potential of White's dark squared Bishop to come alive should the a1-h8 diagonal become open
 
Lesson Learnt
 
Be aware of ghost pieces that are no longer on the board. Be your own Ghostbuster!