Puzzle Description Suppressed:Click below to view spoilers

#1: Jota (jota) on Jun 13, 2019

Any memories Tom?

No idea

solved. one revert at the end.

Ollie doin' a little dance!

Is Ollie an owl?

Found to have a unique solution by wombatilim.

Found to be solvable with moderate lookahead by wombatilim.

Initial LL completes 16%.

R1: EL places blacks in C18-20. LL.
R2: Deep EL (v.R5) marks C2-3 and C16-17 white. LL.
R3: EL v.R5 places blacks in C10-12. LL.
C4: EL marks C16-17 white. LL.

R5: There are blacks in C8 and C11. One of these must be the 1. This means at least one of C9-10 goes into R2, so R2C15 can be marked white.
C23: If the 2 is placed in R5-6, it makes C24 invalid, so these squares are white.
R24: EL marks C1-2 white. LL.

R5: If the black in C8 is the 1, it put blacks in R2 C7-9 and then R5C12, which makes R5 invalid. Therefore R5C8 must be part of the first 2. R5 C1-6, C10, and C12 are white. LL.

C7: Whether the 3 goes into R3 or R6, R7-8 C9 are black. LL.

C15: Whether the 2 goes into R22 or R24, it starts the 2 in C16. R17-20 C16 are white. Minimal LL.

C15: If the 2 goes into R22, the 2 in C17 is placed in R20-21 in 2 moves. If the 2 goes into R24, the 2 in C17 is in R24-25. Either way, R16-19 and R22-23 in C17 are white.

C17: If the 2 is in R20-21, R20C18 is black. If the 2 is in R24-25, R25C18 is black. Either of these completes C18, so R15-19 and R21-24 in C18 are white. LL.

C15: If the 2 goes into R24, the black in R22C22 is determined to be the 1 in C22 in 2 moves, and R21 is made invalid. R22C15 is black instead. LL.

C25: If the 2 is placed in R24-25, R23 is made invalid, so it must go into R21-22 instead.

LL to finish.

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