CFOP · STEP 4 / 10

F2L: pieces stuck in the slot

Free a corner or edge stuck wrong in the slot, then pair and insert. After this, layers 1 and 2 are done.

Find your case fast

Step 1
See which piece is stuck in the slot: the edge, the corner or both. Tap In the slot on the right row.
Step 2
See whether the corner’s white sticker faces up, front or right. Tap that chip.
Step 3
Find the green–orange edge: which top side, or in the slot. Tap that chip.
Step 4
See which colour of the edge is on top: green or orange. One picture is left: tap it to watch.

Tap what you see on your cube. Pictures that do not match hide.

17 / 17 cases

A stuck piece: R U R' lifts it to the top, then compare in step 2 or 3. No need to learn all 17 at once.
Learn the 4 inserts first: R U R', U R U' R', F' U' F, U' F' U F. Every picture ends with one of them.
The front side mirrors the right side: swap R for F'. Learn one side, get the other free.
Learn 3 to 5 pictures of one group a day. Do the formula backwards on a solved cube to set the case up and drill it.
Common mistake: forgetting to turn U so the corner is right above the slot before you compare.

17 / 17 cases

First turn U so the corner sits right above the slot.

Turn U so the edge is at the top front or top right, as in a picture.

1. Hold the cube like this
Yellow centre on top, the white cross underneath. Turn the slot you fill to the front right.
Top
Bottom
2. Find these pieces
Find the slot’s 2 pieces: the white–green–orange corner and the green–orange edge. Another slot works the same way with its colours.
white – orange – green
orange – green
3. For each piece
- See which piece is stuck in the slot: the edge, the corner or both.
- Turn as its group says, then find the matching picture below.
- Tap the picture and turn along. The first group takes the piece out; the rest pairs and inserts.
See the cases

Sometimes the slot’s corner or edge is already in the slot, but wrong. The slot still sits front right.
Edge stuck, corner on top: turn so the corner is right above the slot, then compare with group 1.
Corner stuck, edge on top: turn so the edge is at the top front or top right as in the pictures, then compare with group 2.
Both in the slot but wrong: compare with group 3. Stuck in another slot? Turn that slot to the front right, do to lift the piece out, then go back to step 2 or 3.