Interactive Example:
Cramped Position

NO. 120 ... p173, Cramping of the Rook, Janowski v. Lasker, 1924

PGN

[Event "PCC, p173 Diagram NO. 120"]
[Site "?"]
[Date "1924.??.??"]
[Round "?"]
[White "Janowski"]
[Black "Lasker"]
[Result "*"]
[SetUp "1"]
[FEN "2r1k2r/pp1bqppp/1n2p3/3p4/3P1Pn1/P2BPN1P/1PQ1K1P1/R4N1R w k - 0 0"]
[PlyCount "1"]

{PCC, p173 Diagram NO. 120} 1. Qxc8+ *

End.