LinkedIn 6x6 Sudoku #245 Pro-Tips Speed-Run

LinkedIn 6x6 Sudoku #245: Speed-Run Pro-Tips

Drop into this 6x6 beast on LinkedIn. Rows 2-5 pack a symmetric punch: 1,2,_,_,3,4 mirrors 4,5,_,_,6,1, with 2,1,_,_,4,3 and 3,6,_,_,5,2 twisting the middle. Empty top and bottom rows scream for cross-hatching aggression. Hit it like a speed-run: scan fast, place precise, chain the cascades.

Opening Salvo: Cross-Hatch the Boxes

Start in the top-left 2x3 box. No givens there, but peer at 5. Row 5 col 2 blocks it from row 5. Row 4 col 1 blocks row 4. Column 5 empty in top, but row 1 col 1 screams 5 via cross-hatch: lines slash row 5 and col 2, leaving r1c1 solo. Bam, plant it. Mirror to bottom: 6 in r6c1 cross-hatches clean off row 5 col 1 and col 4 empty path.

Chain to r1c2: 4 pins via row 2 col 2 block and col 6 empty. r1c5: 1 cross-hatches row 5 col 5 and col 2 row 1 block. Momentum builds; re-scan after every placement.

Hidden Singles Unlock the Core

Mid-game, rows 2-5 cols 3-4 are ghosts. Dive into Hidden Singles on column 3. Focus digit 3: givens slash rows 1? No, but row 4 col 1 is 3, row 1 building. Actually, hunt row 1 col 3: candidates dwindle to 3 alone in row after cross-hatch elims from cols. It's the only spot for 3 in row 1, hidden behind clutter.

Pro move: pencil candidates light in 6x6. For col 4, 2 hides as single in row 5: row peers block elsewhere, box forces it. Fill, ripple: naked singles pop in adjacent.

Crucial Square: R3C5, The Grid-Cracker

Stuck? R3C5 is your Crucial Square. This Difficult Cell in the right-middle box fights with 4 already in row 3 col 6 and col 5 row 2's 3. Cross-hatch 5 here: row 4 col 5 is 5, blocks row 4. Col 1 row 3 empty? No, prior fills pin it. Only r3c5 survives for 5 in box 4. Place it, cascade hits: r3c3 5? Wait, no, unlocks r3c4 to 6 via hidden single in row 3 (4 and 3 placed, 1-2-5-6 candidates collapse). Row 3 cracks wide: cols 3-4 fill 5 then 6.

That placement triggers full house in row 2 col 5: 3 given, cascades force rest. Bottom row chains via col 5's 1-3-5 locked.

Tactical Finish: Re-Scan Chains

Post r3c5, row 4 col 3: 4 naked single (row peers block 1-2-5-6). Col 3 row 6: 1 hides as only spot. Final rows snap via last-remaining: top fills 5-4-3-2-1-6 pattern, bottom mirrors 6-3-1-4-2-5. Under 90 seconds if you nail the crucial square early.

Drill this: cross-hatch per box per digit, hunt hiddens in almost-full units, strike the Crucial Square r3c5 to shatter #245. Next LinkedIn 6x6 awaits your speed-run.