Moderate difficulty suitable for most players
Cryptic Depths of Subterranean Passages
Challenging puzzle for experienced crossword solvers
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Across
- 1. Horizontal underground passage through rock or coal
- 2. Secret underground escapement, or daring adventure
- 5. Vents for subterranean air circulation in shafts
- 8. Structural arches reinforcing deep tunnel ceilings
Down
- 3. Waterproof chamber sunk to build foundations below
- 4. Base layer beneath tunnels where excavation masters
- 6. Slope entrance providing access to a mine’s vein
- 7. Curve supporting overhead wires beneath earth's crown
- 9. Ancient underground sanitation facilities in tunnels
- 10. Temporary support in unstable tunnel excavations
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