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4 pieces in a row: clearance for discovery
Compiled by notyetagm
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_THREE_ pieces in a row make a discovery chain.

So if there are _FOUR_ pieces in a row, we need to move one of our pieces out of the way with a <GAIN OF TIME (CLEARANCE)> so that we will have the requisite _THREE_ pieces in a row for the <DISCOVERED ATTACK>.

23 Be3xc5! vacates the e-file for discovered check 24 Ne5xg6+
F Vallejo Pons vs Aronian, 2010 
(C67) Ruy Lopez, 41 moves, 1/2-1/2

45 ... Qc7-c3+! vacates the 7th rank to make discovery chain
Jakovenko vs Shirov, 2007 
(B33) Sicilian, 53 moves, 0-1

19 Ne4-d6!! vacates the e-file for 20 Ne5-c6+, 21 Qe3xQe6
Short vs Timman, 2008 
(C67) Ruy Lopez, 40 moves, 0-1

3 games

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