TN4

TN4 method Information about the method Proposer(s): Ngô Anh Tuấn Proposed: 2025 Alt Names: Variants: No. Steps: 6 No. Algs: unknown Avg Moves: unknown Purpose(s): Speedsolving

Introduction

TN4 (short for Tuan Ngo 4x4) is a 4x4 speedsolving method proposed by Ngô Anh Tuấn in 2025. TN4 method solves up to F2L-1, starting the 3x3 stage with LSLL.

Steps

1. Solve 2 opposite centers.
2. Solve a 1x3x4 block on the left using one of the solved centers (like Meyer method).
3. Solve a 1x3x3 block on the opposite back right, except the top BR edge piece.
4. Solve D center and 4 F3L pairs on the F and B faces (like F3L method, each F3L pair consists of 1 edge piece and 2 center pieces).
5. Rotationless edge pairing using FR slot (the top BR edge piece will be placed correctly after this step to complete F2L-1).
6. LSLL (+ parities).

Pros

• Good lookahead and high TPS are possible in steps 5 and 6.
• F2L-1 is completed prior to the 3x3 stage.
• The blockbuilding and intuitive nature.
• Mostly rotationless.

Cons

• Requires a lot of lookahead and M-slice moves in steps 2, 3, and 4.

Example solves

Example solve #1
Simulation: [1]
Scramble: F' B' U2 B D2 R2 F B D2 R' U F2 L D U' B2 R2 F' U R2 Uw2 Fw2 D2 R' Fw2 F' Rw2 R2 U2 L Uw2 B' Uw' B2 U2 R2 Uw Rw Uw B' D Rw U' L2
Solve:
z' y2 F u' l2 F2 l' d' l U2 l' // F2C
z F' r B x 2R 2L2 F U' B R 3r U 2L2 B' // FB
r U' r U R U' 2R' U F R2 F'// 1x3x3 block, except the top BR edge piece
m U 2L U 2R2 U' 2R' U 2R U 2L' U' 2L U r U2 r' U2 2L' U' F R' F' R 2L2 U2 2L' R' F R F' R U R' 2L' U 2L // D center and 4 F3L pairs
u R U2 R' u' F' U2 F u R U2 R' u' F' U F u F' U F u' // Edge pairing
3r U' R' U R U2' R' U' R 3r' // TNLS
R2 D 3r' U2 3r D' R2' U R U R' // TNLL
2R2 U2 2R2 u2 2R2 u2 // PLL Parity
U2 // AUF

Example solve #2
Simulation: [2]
Scramble: L2 D' L F R D B2 L' D' B D' R2 F D2 R2 U2 F2 R2 F2 Fw2 R Uw2 Rw2 L' F' L' F' Uw2 Rw2 Fw2 U' B2 R' Uw' U D2 Rw' F2 Uw R2 Fw B Uw' U'
Solve:
x' y2 D F' l F' l2 F' l2' U2 l y U2 l' U2 l // F2C
z' F U2 r2' D' R U F U2 r2 B R' F' 3r' U2 F' 2L' U2 F' // FB
R U' m' R' U' R2 U2 3r2' // 1x3x3 block, except the top BR edge piece
U m' U' 2R2 U' 2R U 2L' U' 2R U2 2R U' 2R2 U2 2R U 3r U2 3r' U2 2L' U' 2L // D center and 4 F3L pairs
U F R' F' R u U R U' R' u' // Edge pairing
U' F R' F' R // TNLS
U2 R F' U2' R' U' R U' F U' R' U' R U2' R' // TNLL
U2 r' U' r U' r U r2' U' r2 U2' r U2 r' U2' r U2 r U' r U r' U' r U2 r' // OLL Parity

Example solve #3
Simulation: [3]
Scramble: B D' R2 F2 D' B' U2 R B D L2 U2 R2 U F2 R2 D' B2 L2 U' Uw2 R F Rw2 Fw2 Uw2 L D2 F2 L Fw2 Rw2 R' Uw Rw2 R Uw' D U Rw Uw2 R U Rw' Fw
Solve:
z' y' U r' U2 f2 r' U r y' u' R 2U r U2 r' // F2C
z' U2 r' D' 3r B 2R B 3r2 B m' F 2R2 U2 F' // FB
U 3r' U 2L' U2 3r U 3r' U 3r2 // 1x3x3 block, except the top BR edge piece
U2 2R' U' 2R m' U m' U' 3r U 2L R' 2R U' 2R' U 2L U2 2L' R U' R' U' r U2 r' // D center and 4 F3L pairs
u R U2 R' u' R U2 R' u F' U' F u' R U2 R' u R U' R' u' // Edge pairing
U' F' U F U' R U2 R' // TNLS
U R U2 R' U R U2 R D R' U2 R D' R' U R' // TNLL
R U R' U' 2R2 U2 2R2 u2 2R2 u2 U' R U' R' // PLL Parity
U // AUF

Example solve #4
Simulation: [4]
Scramble: L' D' R' B' D2 R U L B U2 B2 U' F2 D' R2 B2 U2 L2 F2 D Rw2 F2 D2 Fw2 L' B Rw2 B' Uw2 R2 F2 Uw' F D R' B2 U R Fw' Uw R Fw Uw' Rw D'
Solve:
B' r F B2 r' 3d F' r U2 r' // F2C
z' R F' r' D' B' U' r' R' F m2 F U2 R U' R' 2R 3r2 B' // FB
U' R 3r2 U' 3r' U' m' R' U 2L U r2 // 1x3x3 block, except the top BR edge piece
U' r U' m' U2 2L' U' R' U' R U' 2L2 U2 2L2 2R U' 2r' U' 2L' U 2L U2 2L' U 2L // D center and 4 F3L pairs
u R U2 R' u' R U R' u R U R' u' R U' R' u R U R' u' // Edge pairing
U R U' R' F R' F' R2 U' R' // TNLS
U2 R2 U R2' U R2 U2' R2' // TNLL
2R2 U2 2R2 u2 2R2 u2 // PLL Parity
U' // AUF

Example solve #5
Simulation: [5]
Scramble: R' F R' U2 D2 L' B L B' U' F' R2 D2 B' D2 F2 U2 B' U2 Fw2 L' D' Fw2 R' U2 Fw2 U2 Rw2 U' R' U' D' B' U2 Fw B2 U L2 Rw B Uw' Rw2 D' Rw' U2
Solve:
z y2 F u' l B' r' U2 r d l' U2 l // F2C
z U2 2L D' U r U R U' B2 3r' U 2L2 F' 3r' F' // FB
3r U2 R U 2L' 3r R U2 m U r R // 1x3x3 block, except the top BR edge piece
U' m' U' 2R U' 2R U2 2R' U' m' U m' U2 m U2 2L' U2 2L U 2R u R U R' u' U 2R' U2 2R' U2 2R U2 2R' U2 2R // D center and 4 F3L pairs
R U R' u R U R' u' U' F' U F u U R U' R' u' // Edge pairing
U2 F U R' U' F' U R // TNLS
U2 R U2' R' U R U R' D R' U2' R U' R' U' R D' // TNLL
U // AUF

Links

• TN4 method Tutorial (English Subtitle) [6]
• TN4 method Example Solves #1 [7]