Unknown cipher for 4-2-19

Here’s a randomly generated cipher of unknown type. All my ID tests got the correct type. Hill-climbing, my special key search, and converging key search all solved it, but they all needed the crib.

???
QADOQ JIKVM TWWJT OBTRQ JJONL CJKNX NNNQE PPKZS SFIMS PVSXL QFHRA
DIIBT ILZKD XTDLJ ADCQM JIYDI USEZD DIURB VWDXA VACKQ NRELG ADXBR
ATNGB XBATQ QGAVH MBSMT WBNKL ITRJW NDDMN LDYSC OYSXU DDLMA XSFOP
VLZAH DG.

caesar-shifted crib: JXJJRXGJYYJWUTTW

2 thoughts on “Unknown cipher for 4-2-19”

  1. It continues MJMFXSTB. I had considerable trouble with this one. My Analyzer identified the type correctly. My automatic programs made no headway, so I had to work it interactively. I placed the crib and was able to guess the ending word and eventually worked through it. My key finder did find one of the keys which made progress possible.

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