gauer: There might be a bit more to find by digging up some flagged games in gauer's Game Collections & below are some other ideas in unlocking Locked structures:
Morphy, in a blind simul, may have missed the win in Morphy vs S Boden, 1859 1/2.
Invading the Open Diagonals in a Locked position is featured in Englisch vs J Bauer, 1890 1-0.
A novel Pillsbury Attack Plan takes its introductory bow in Pillsbury vs Tarrasch, 1895 1-0, with the practitioner showing off similar ideas in Pillsbury vs E Delmar, 1893 1-0, but also noting less successful tries in Pillsbury vs J C Halpern, 1894 0-1, thereby modernizing the Queens Gambit theory.
A Chigorin Spanish Attack Plan features play to control the few Open Files in N Johansson vs R Rey-Ardid, 1933 1-0, & a result with the Tables Turned is featured in Tarrasch vs Lasker, 1916 0-1.
In addition to Horizontal structures, a French Attack Plan features the Wedge (a Diagonal Pawn formation - see below, Doubled), in Duras vs Spielmann, 1912 1-0, also demonstrating the strength of a Controlled Open line (here, a File again). In other French ideas, the white King might be caught visiting the Centre for too long, being a poor Blockader of an unshackled Chain, as in Maroczy / Rollans vs Korchnoi, 1985 0-1, when the Kingside Attack vs his counter-part might not work out so well.
Common in the Kings Injun Attack Plan is the Diagonal Pawn Chain, as in Belov vs Prohorov, 1991 0-1, here featuring an imbalance of Heavy-duty units.
Tandem chess - members of each team get to decide when/whether to attempt a successful Exchange Sack Break, Blackburne / Potter vs Steinitz / Zukertort, 1875 1/2 ending instead in a Drawn position.
Page 14 of Sam Loyd features a couple of the Geometric ideas of the Passage theme via Pawn Break, & Kudrin vs R Douven, 1989 1-0 features how quickly a related Quart-grip Pawn Chain position can go from seemingly closed to open in just a few moves of Bull-dozing. For more on Ram Lever Breaks, Von Popiel vs Janowski, 1896 0-1 features a much Central contact between moves 13-20, with potential to divide the board in two.
In addition to the Horizontal & Diagonal Chains, a book called "Point Count Chess" also deals with the theme of reverse-salient side Pawn Levers via the Undermining tactic of Salient features of the related Wedge structure, as in Janowski vs Capablanca, 1916 0-1, with a typical goal being to attack an Anchor of an Outpost.
Rook & many Pawn endings often feature a common Drawing tactic of getting a Fortress by finding lines to continually apply distant checks, but in Capablanca vs Tartakower, 1924 1-0, a well-timed Pawn Break stops the position from becoming too Locked up for the white King too soon.
Some of the dificulties in seeing two competing algorithms attempt to manoeuvre for a win in less than human-type normal efforts are featured in The Baron vs Zappa, 2007 0-1. Earlier on, black finds a useful Staircase method in Deep Fritz vs Deep Junior, 2001 0-1.
Anand vs Svidler, 2006 1-0, near move 30, gives a fairly symmetrical, partially Locked position with a multitude of Pawns in play.
Although enclosed, white gets Imprisoned in a Tomb in B Harper vs R Zuk, 1971 0-1, being unable to build a Fort for his King.