PBL Trainer (2x2)

Improve your 2×2 Ortega recognition with our PBL Recognition Trainer. Inspect each half of the cube, spot the matching colour pairs and choose the correct algorithm. Start with helpful clues in Guided mode, then test your memory in Challenge mode. Each answer includes a visual explanation and an animated solution, while 10-card rounds track your accuracy, streak and recognition speed to help you build confidence and reduce pauses during solves.

PBL Recognition Trainer

2×2 Ortega

Practise recognising the final Ortega step. Four matching side pairs means a layer is in order, one pair means adjacent, and zero pairs means diagonal.

Choose a flashcard

Switch layers to inspect the other half before choosing an answer.

Inspect the cube

Card 1 of 9
Rotate to a view
Side colours as text

Top layer
Front orange and red · Right blue and red · Back green and green · Left orange and blue

Bottom layer
Front green and green · Right orange and blue · Back orange and red · Left blue and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Adjacent + adjacent

Top. One matching side pair on the back. This is an adjacent swap.

Bottom. One matching side pair on the front. This is an adjacent swap.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
U2
Algorithm
R2 U' B2 U2 R2 U' R2
Final alignment
None

Inspect the cube

Card 2 of 9
Rotate to a view
Side colours as text

Top layer
Front green and green · Right orange and blue · Back orange and red · Left blue and red

Bottom layer
Front blue and green · Right orange and red · Back blue and green · Left orange and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Adjacent + diagonal

Top. One matching side pair on the front. This is an adjacent swap.

Bottom. Zero matching side pairs. This is a diagonal swap.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
None
Algorithm
R U' R F2 R' U R'
Final alignment
None

Inspect the cube

Card 3 of 9
Rotate to a view
Side colours as text

Top layer
Front blue and green · Right orange and red · Back blue and green · Left orange and red

Bottom layer
Front blue and green · Right orange and red · Back blue and green · Left orange and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Diagonal + diagonal

Top. Zero matching side pairs. This is a diagonal swap.

Bottom. Zero matching side pairs. This is a diagonal swap.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
None
Algorithm
R2 F2 R2
Final alignment
None

Inspect the cube

Card 4 of 9
Rotate to a view
Side colours as text

Top layer
Front orange and blue · Right red and red · Back orange and green · Left blue and green

Bottom layer
Front green and green · Right orange and orange · Back blue and blue · Left red and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Adjacent + solved

Top. One matching side pair on the right. This is an adjacent swap.

Bottom. Four matching side pairs. The layer is in order.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
U2
Algorithm
R U2 R' U' R U2 L' U R' U' L
Final alignment
None

Inspect the cube

Card 5 of 9
Rotate to a view
Side colours as text

Top layer
Front orange and red · Right blue and green · Back orange and red · Left blue and green

Bottom layer
Front orange and orange · Right blue and blue · Back red and red · Left green and green

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Diagonal + solved

Top. Zero matching side pairs. This is a diagonal swap.

Bottom. Four matching side pairs. The layer is in order.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
None
Algorithm
R U' R' U' F2 U' R U R' D R2
Final alignment
D2

Inspect the cube

Card 6 of 9
Rotate to a view
Side colours as text

Top layer
Front blue and blue · Right orange and orange · Back green and green · Left red and red

Bottom layer
Front orange and blue · Right blue and green · Back orange and green · Left red and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Adjacent + solved

Top. Four matching side pairs. The layer is in order.

Bottom. One matching side pair on the left. This is an adjacent swap.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
x2
Algorithm
R U2 R' U' R U2 L' U R' U' L
Final alignment
None

Inspect the cube

Card 7 of 9
Rotate to a view
Side colours as text

Top layer
Front orange and orange · Right green and green · Back red and red · Left blue and blue

Bottom layer
Front orange and red · Right blue and green · Back orange and red · Left blue and green

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Diagonal + solved

Top. Four matching side pairs. The layer is in order.

Bottom. Zero matching side pairs. This is a diagonal swap.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
x2
Algorithm
R U' R' U' F2 U' R U R' D R2
Final alignment
D2

Inspect the cube

Card 8 of 9
Rotate to a view
Side colours as text

Top layer
Front blue and green · Right orange and red · Back blue and green · Left orange and red

Bottom layer
Front orange and red · Right orange and blue · Back green and green · Left blue and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

Adjacent + diagonal

Top. Zero matching side pairs. This is a diagonal swap.

Bottom. One matching side pair on the back. This is an adjacent swap.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
x2
Algorithm
R U' R F2 R' U R'
Final alignment
None

Inspect the cube

Card 9 of 9
Rotate to a view
Side colours as text

Top layer
Front blue and blue · Right red and red · Back green and green · Left orange and orange

Bottom layer
Front green and green · Right orange and orange · Back blue and blue · Left red and red

Which PBL case is this?

Count the matching side pairs around each layer, then choose the combination.

Choose a case
Reveal the solution

No PBL algorithm

Top. Four matching side pairs. The layer is in order.

Bottom. Four matching side pairs. The layer is in order.

Hold the cube as shown in the Front + right view before applying these moves.

Setup
None
Algorithm
Align the layers only
Final alignment
D2