Revision 8.00 Distribution 3. It has been pointed out to me that a new numbering system has been adopted for Nethack version 3.1. Patches are denoted by adding a period and the patch number to 3.1 instead of a letter.
Letters infer a non-official patch.
Although much of the information contained within the Spoilers is also relevant to previous versions of Nethack, don't depend on it. Our suggestion is that you get a copy of the latest and greatest version of Nethack - version 3.1.1. It has also been pointed out that there is no longer a HARD option. Additionally, for the sake of simplicity we have assumed that all the compile options are at their default settings unless otherwise specified. This means that all the optional code is compiled in, etc.