What This COLL Subset Does

T COLL applies when you recognize a T-shaped OLL pattern on the last layer. The T pattern is characterized by a line of three correctly oriented pieces with one corner needing orientation. T COLL solves both corner orientation and permutation in one algorithm when corners are already oriented, leaving only EPLL to finish.

When to Use: After F2L, if you see a T pattern on the last layer AND all corners are already oriented correctly, you can use T COLL instead of standard OLL + PLL.

Recognition Logic

Step 1: Identify T Pattern

Look for the T-shaped pattern: a horizontal or vertical line of three correctly oriented pieces forming a "T" shape. This is one of the most recognizable OLL patterns.

Step 2: Verify Corner Orientation

Ensure all four corners are already oriented correctly. T COLL only works when corners don't need orientation.

Step 3: Identify Corner Permutation

Determine how the corners need to be permuted. T COLL has multiple cases based on different corner swap scenarios.

Example Algorithms

Note: These are examples. Full T COLL subset contains multiple cases based on corner permutation.

Remember: After executing COLL, you'll need to recognize and execute one of four EPLL algorithms to finish the solve.

Why This Subset Is Useful

• Good Recognition: T patterns are easy to spot and recognize quickly
• Moderate Frequency: T patterns appear in approximately 10-15% of solves
• Time Savings: Can save 1-2 seconds compared to OLL + PLL
• Learning Progression: T COLL is a good next step after mastering Sune and Antisune COLL

Common Mistakes

• Confusing T with other patterns: Make sure you can reliably identify T patterns before attempting COLL
• Using COLL when corners need orientation: T COLL only works when corners are already oriented
• Wrong case selection: T COLL has multiple cases; ensure you're using the correct one for your corner permutation
• Rushing EPLL: Don't forget to solve edge permutation after COLL

Navigation

Resources