[sivm]

K5 is instructions something like: Head for the wall facing north; use the rim’s shadow as the clock. Berlin is the light.

So head north of it and use the shadows rim and 4/4/11/4 reveals and the Berlin clock sequence. Maybe on NOVEMBER NINE AT DAWN if you simulate it.

[sivm]

K6 is something like NOON HERE CENTER ON THE NORTH RIM; THEN READ THAT.

I don’t know if it ends.

[sivm]

Since nobody wants to play with me… if you have something beefier than my 386, you should have enough to finish. Remember it is always 5:55 somewhere- even in Berlin.

Partial answer: FACE EAST THEN NORTHEAST. LET THE BERLIN CLOCK CHOOSE; READ EDGE TO EDGE TO FIND THE FINAL CODE.

K4 可能由类 Vigenère 层加柏林钟的基5转置构成；我以已知 crib 为锚点，运行搜索，并利用 IC、χ² 与 n-gram 收敛到英文分布。

[sivm]

K4 changes it’s methodology DRASTICALLY and you must use clues like a riddle from previous solutions. The Morse code is the program to run. Make a mask from the unneeded E’s but don’t discard them, they clarify. Ignore the flicker see the edg-e. The grid becomes a compass with some work and be sure to normalize the directions. Caesar might help dispel the mist. Decoys abound in partial/incomplete solutions. One wrong turn and work disappears. My 386 was an abomination to the old man and he set traps- paper and pencil ruled his world.

NORTHWEST, EAST, NORTHEAST. BERLIN CLOCK TICKS EAST. READ EDGE TO EDGE; SEE TIME, USE THE NORTHEAST SHADOW. THE HIDDEN PLACE IS REVEALED.

Sorry for the bother

[sivm]

Here it is. It drove me crazy losing sleep

ATEQUINOXREADEDGETOEDEASTNORTHEASTFACETHENLETEDGEORDERBYTHERIMXBERLINCLOCKCHOOSEANDNAMETHEFINALCO

AT EQUINOX READ EDGE TO ED EAST, NORTHEAST FACE THEN LET EDGE ORDER BY THE RIM BERLIN CLOCK CHOOSE AND NAME THE FINAL CO

[schoen]

Did you share this with an audience that's actively working on Kryptos?

[sivm]

I tried to work with Reddit last night but was discouraged so I left. I emailed for verification and sent the $50.