Demolition mastery

A solution by cf (Time: 1.5s, Blocks used: +14)

A solution by Tom (Time: 1.4s, Blocks used: +3)

A solution by AndyB (Time: 2.0s, Blocks used: +3)

A solution by Stefan (Time: 1.4s, Blocks used: +12)

A solution by opensourcefan (Time: 1.4s, Blocks used: +8)

A solution by clippy (Time: 0.9s, Blocks used: +5)

A solution by Jan (Time: 1.1s, Blocks used: +15)

A solution (Time: 1.0s, Blocks used: +6)

A solution (Time: 0.8s, Blocks used: +10)

A solution by Lunchbox (Time: 0.9s, Blocks used: +8)

A solution by Žisek (Time: 1.7s, Blocks used: +9)

A solution by AceJay (Time: 1.6s, Blocks used: +17)

A solution by Blotto (Time: 1.7s, Blocks used: +4)

A solution by A³ (Time: 1.7s, Blocks used: +6)

A solution by Moww2 (Time: 1.8s, Blocks used: +8)

A solution by Miguel Nunez (Time: 2.1s, Blocks used: +8)

A solution by Miguel Nunez (Time: 2.2s, Blocks used: +8)

A solution by vinnie (Time: 1.5s, Blocks used: +23)