Clearance sacrifice
Clearance sacrifice is a tactical motif which involves the vacation of a square on the chessboard to open up lines of attack. The tactic may also result in the substitution of a piece hindering the attack by a piece useful to the attack.
Example of clearance sacrifice
| a | b | c | d | e | f | g | h | ||
| 8 |             | 8 | |||||||
| 7 | 7 | ||||||||
| 6 | 6 | ||||||||
| 5 | 5 | ||||||||
| 4 | 4 | ||||||||
| 3 | 3 | ||||||||
| 2 | 2 | ||||||||
| 1 | 1 | ||||||||
| a | b | c | d | e | f | g | h | ||
1.Rf8+ Rxf8 2.Qg8+ Rxg8 3.Nf7#
Example
In the diagram, the clearance sacrifice 1.Rf8+ vacates the f7 square and, after 1…Rxf8 (better than 1...Bxf8 2.Qg8#), White utilizes the battery on the a2–g8 diagonal. After 2.Qg8+ Rxg8 (only move), White mates with 3.Nf7#, utilizing the f7 square vacated by the clearance sacrifice.[1]
References
- George Huczek (2017). A to Z Chess Tactics. Batsford. pp. 1–349. ISBN 978-1-8499-4446-5.
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