1x2x3 Block

1st Roux Block Information Proposer(s): Gilles Roux Proposed: 2003 Alt Names: First Roux Block, First Block, FB, Left block, LB Variants: FBEO, FBCP Subgroup: No. Algs: intuitive Avg Moves: 5.14 (color neutral) 5.6 (x2y neutral) 6.7 (fixed) [1] Purpose(s): Speedsolving, FMC

The 1x2x3 Block is the first step of several 3x3x3 speedsolving methods, the most popular being Roux. This first step consists of building a 1x2x3 block anywhere on the cube.

Depending on the method used, it may also be called First block (often shortened to FB) in a Roux context or Left block (shortened to LB) in a LEOR context.

See also

• Roux
• LEOR
• Blockbuilding

External links

Tutorials

• Kian Mansour's video (for beginners)
• Teoidus's "Finding an Efficient First Block in Inspection" video
• Louis de Mendonça's video tutorials
• Rouxles' website (first block section)
• Iuri Grangeiro's video on line first blocks
• CriticalCubing's video tutorial
• Kavin Tangtartharakul's video on efficiency
• Kian Mansour's video on one-handed First Block
• Alexander Lau's video tips

Trainers

• Onionhoney's Roux trainer
• Cubegrass block trainer