... by: osiguy
Ok from the stall point with my analyzer larsdoku bd=S9B8n8n849h042d2r082g0s110806032d092t2k070n7w057o0h060v0wbg070643840t038584057s7w9lac1s2b9g087sb801d09w2g04069wc4c4032k38055u9m011f1v070u0809021a26b804842g013c6a9iaeI see a series of eliminations that leads to a placement that opens the board, i hope this is helpful! There is another series of eliminations before a second forcing chain.
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DETAILED SOLVE LOG (10 rounds)
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Round 1
XWing 4 eliminations
R1C2: 6 | R1C9: 6 | R9C8: 6 | R9C9: 6
X-Wing: 4 eliminations
Round 2
ALS_XZ 1 elimination
R9C1: 7
ALS-XZ: 1 eliminations
Round 3
KrakenFish 2 eliminations
R5C6: 2 | R5C8: 2
Kraken Fish: 2 eliminations
Round 4
ForcingChain R5C7 = 1✓
Notes before: 1 7 → placed 1
Forcing Chain: all branches from bivalue cell lead to 1@R5C7