LinkedIn 6x6 Sudoku #244 Pro-Tips Speed-Run

LinkedIn 6x6 Sudoku #244: Speed-Run Breakdown

Grid hits you with sparse givens: 2 up top right in row 1, 4 and 6 anchoring row 2, symmetric 2-4 in row 3, then 1-3 framing row 4 and 5, 3-1 in row 5, 5 bottom middle. Classic mini-Sudoku trap: boxes look open, but rows and columns hide the path. Speed-run starts with cross-hatching on 1s and 2s. They cluster early, slashing candidates fast in this 6x6 squeeze.

Cross-Hatching Kickoff: 1s and 2s Clear the Fog

Grab 1. Row 4 col 2 blocks it. Cross-hatch column 2 down: hits nothing else yet. Swing to box 4 (rows 4-6, cols 1-3): row 5 col 3 owns 3, but 1 scans clean into row 6 col 1. That's your first lock: r6c1 = 1. No guesswork, pure elimination.

Flip to 2s. Row 1 col 3 and row 3 col 1 pin them. Cross-hatch row 1 across box 1 (rows 1-3 cols 1-3): column 3 owns it, but row 3 col 1 crosses out r2c3. Leaves r1c1 screaming 2? Wait, no: chain it. Row 3's 2 blocks r3c3, hatch reveals r2c2 impossible. Boom, r1c1 = 1 via hidden single in box 1 column 1. Momentum builds.

Hidden Singles Unleash Chain Reaction

Post-1s, row 2 col 1: scan box 2 (rows 1-3 cols 4-6). 6 in r2c4 blocks column 4. Hidden single pops: 3 only fits r2c1. Fill it, re-scan. Row 3 col 2 empties fast: 6 from r3c3? No, cross-hatch 6s from r2c4 reveals r3c2 = 3, box 2 column 2 exclusive.

Now row 4: the Difficult Row. Givens at col 2 (1) and col 6 (3). Cross-hatch 5s early? Nah, too scattered. Hidden singles in box 4: after top fills, column 5's 4 (r3c5) and row 5's 1 (col 5) pin 6 to r4c1 only. But the Crucial Square: r4c3. Here's the crack.

Crucial Square r4c3: The Row 4 Shatterpoint

Row 4 stalls with 1 and 3 givens. Cross-hatch 4 in box 4: row 3 col 5 owns column 5's 4, row 5 col 4 empty but scanned. Candidates dwindle: r4c3 sees 2 blocked by r3c1, 5 by bottom 5, 6 by fresh r4c1. Leaves 4 as hidden single in row 4 column 3. Pencil marks confirm: only spot for 4 in row, box, column.

Drop r4c3 = 4. Row 4 explodes. Column 3's 2 (r1) and 3 (r5) hatch 5 into r4c5 hidden single. Then 2 slots r4c4. Boom, row 4 full: 5-1-4-2-6-3. Speed-run flips to columns, box 6 cleans with last-remaining 4 in r6c1? Wait, chain fills bottom.

Pro-Tips for 6x6 Speed: Tactical Edge

• Number 1-2 Priority: Low digits cluster in minis. Cross-hatch them box-by-box to unlock 30% of grid in 60 seconds.
• Box-Row Dance: In 2x3 boxes, row scans hit harder than 9x9. Focus almost-full rows like row 4 for hidden singles.
• Re-Scan Ruthlessly: Every fill ripples. After r4c3, column 1 hidden single drops r5c1=6 instantly.
• Crucial Square Hunt: When a row lags (row 4 here), candidate-count the middle: under 3 options? It's your shatterpoint.
• 6x6 Endgame: Boxes 3 and 6 fill last via full houses. Cross-hatch 6s final: pins everything home.

Clock it under 2 minutes next time. Row 4's r4c3 was the vault door. Practice on paper, pencil candidates light. You've got the edge now.