from the author of the program:http://forum.enjoysudoku.com/post32429.html#p32429
"Regarding "Dynamic Forcing Chain (+)", these are chains in which at least a hidden pair, naked pair or intersection is used within the chain. I don't know exactly how this relates to ALS. In "Dynamic Forcing Chain (++)" (rated 9.5-10.5), I also include hidden/naked pairs/triplets, swordfish and jellyfish."
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. . . . . 7 . 9 3
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..4....6......7.938.3.6....96.........182.....5..9..........1.4...1.5.7......92..
basics:
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after basics:
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1257 1279 4 2359 1358 1238 578 6 12578
1256 12 256 245 1458 7 458 9 3
8 1279 3 2459 6 124 457 1245 1257
9 6 278 3457 13457 134 3478 12348 1278
347 347 1 8 2 346 345679 345 5679
2347 5 278 3467 9 1346 34678 12348 12678
3567 378 9 2367 378 2368 1 358 4
2346 2348 26 1 348 5 3689 7 689
134567 13478 567 3467 3478 9 2 358 568