LinkedIn 6x6 Sudoku #220 Pro-Tips Speed-Run

LinkedIn 6x6 Sudoku #220: Speed-Run Pro-Tips

Jump into #220 with eyes on the givens: row 2 packs 5-6-1 early, row 3 kicks off with 5, row 4 with 4. Columns 2 and 4 anchor with 5,3,2. This 6x6 setup screams quick fills if you hit the logic sharp.

Opening Blitz: Naked Singles and Cross-Hatching

Start row 1. Scan for 1: blocked by row 2 col4, row 3 col1. Cross-hatch column 3: row 6 has 1 in col1, so no. Row 5 col3 open? Check box constraints. Actually, pivot to row 6: givens 1-2-4-3 pin the rest fast. Cross-hatching here slashes possibles in col6: only spot left screams 6 after eliminating from row5 col5=3 threat.

Row 4 col2 empty? Hunt 1: row3 col2 open but box1 blocks via row1 possibilities. Fill row 3 col6 first: only 1 fits after 4 in col5 blocks others. Propagate: column 6 now forces row1 col6=3. Boom, top box cracks.

Stall Zone: The Difficult Row 5

By now, rows 1-2-6 and cols 1-4 half-full. But row 5 stalls hard: givens 3 in col2, 2 in col4. Possibles tangle with 1,4,5,6 across empties. Columns 3-6 resist; boxes 4-6 whisper but no singles pop. This is your Difficult Row - mid-game wall where newbies guess.

Crucial Square: R5C6 Hidden Single Unlock

Zero in on R5C6 - the game-changer. Why? Cross-hatch 5 in row 5: col3 blocked by row3 col3 potential, col5 by given 3 row5, col1 by box4 row4 col1. Col6? Box6 row4 col6=6 given kills elsewhere. Hidden single: only R5C6 holds 5 in box6 for row5. Place it.

Aha! Ripple hits: row5 col3 now sole 4 (eliminates 5), col1 gets 6 via box4 pair-lock. Column 6 fills top-to-bottom: R4C6 forces 2 elsewhere, chaining R2C6=4. Row 2 col5=2 via naked single.

Closing Sprint: Pairs and Box-Line Reduction

Post-unlock, row 4 col3=3 via pointing pair from box4. Hunt hidden pairs in col3: rows 1-2 share 1-2 possibles, kill from box1 row1. Final boxes drop via elimination: top-right needs 5-6-2 permutation, only one fits.

Pro move: After R5C6, re-scan boxes vertically. Box3 col6 empty pins 2 via row4. Speed-run total: under 90 seconds spotting that hidden single early.

Your Edge

Drill #220 daily. Cross-hatch ruthlessly on stalls, trust hidden singles in tight 6x6 boxes. Next puzzle, hunt the crucial square first. You've got this - solve sharper tomorrow.