Answers.Body: <p>The notion of null-move is implicit to orthodox chess problem theory, and all specialist chess problem software will support it.  </p>
  
  <p>Firstly there is the notion of threat. After White plays a move in a conflict format (direct or self mate) the first consideration if there is no check is what would happen if White moved again immediately. Then the Black moves which would avert the threat are the only defences which need to be considered.  </p>
  
  <p>The second notion applies to helpmates as well. This is set play, where it is assumed that the first player misses their first move. Often the play contrasts the mainline play thematically.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-18T16:36:41.607Z
Answers.LastActivityDate: 2018-04-18T16:41:49.007Z
Answers.LastEditDate: 2018-04-18T16:41:49.007Z
Answers.UserDisplayName: Laska
Answers.Body: <p>Fritz allows null move entry via CTL+ALT+0. There may also be a menu option to do this.</p>
  
  <p>Scid vs PC also allows this by capturing one king with the other or by using the keyboard to enter "--" i.e. hit the minus key twice.</p>
  
  <p>Hiarcs also uses king takes king to enter a null move. There is also a menu option "Insert/Null Move" in the "Edit" menu, plus a keyboard shortcut of CTL+0</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-19T10:42:39.583Z
Answers.Text: Chessbase has a problem with NULL moves is the move allows an illegal position, ie, the side trying NULL move is in check.
Answers.UserDisplayName: Fred Knight
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-19T13:22:01.203Z
Answers.Text: @FredKnight Gosh! There's a surprise.
Answers.UserDisplayName: Brian Towers
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-17T13:44:22.673Z
Answers.LastActivityDate: 2018-04-17T13:59:37.750Z
Answers.LastEditDate: 2018-04-17T13:59:37.750Z
Answers.UserDisplayName: Brian Towers
Body: <p>Is there a GUI that allows <em>null-moves</em> as legal moves? Of course for engines the <a href="https://en.wikipedia.org/wiki/Null-move_heuristic" rel="noreferrer">null-move heuristic</a> already is an established technique.</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-04-18T01:58:34.567Z
Comments.Text: Jonathan Schrantz wanting to do a null-move: https://www.youtube.com/watch?v=JR8_vnUXcGk&feature=youtu.be&t=44m24s
Comments.UserDisplayName: Daniel Gerigk
Tags: <engines><software><programming>
Title: Chess GUI that allows null-moves
ThreadText: # Chess GUI that allows null-moves
  
  (Asked by: username_0 on 2018-04-17)
  
  Is there a GUI that allows *null-moves* as legal moves? Of course for engines the [null-move heuristic](https://en.wikipedia.org/wiki/Null-move_heuristic) already is an established technique.
  
  **Tags:** engines, software, programming
  
  > **Comments:**
  > **username_0**: Jonathan Schrantz wanting to do a null-move: https://www.youtube.com/watch?v=JR8_vnUXcGk&feature=youtu.be&t=44m24s  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_2 on 2018-04-17. Score: 7 | Accepted answer
  
  Fritz allows null move entry via CTL+ALT+0. There may also be a menu option to do this.
  
  Scid vs PC also allows this by capturing one king with the other or by using the keyboard to enter "--" i.e. hit the minus key twice.
  
  Hiarcs also uses king takes king to enter a null move. There is also a menu option "Insert/Null Move" in the "Edit" menu, plus a keyboard shortcut of CTL+0
  
  > **Comments:**
  > **username_3**: Chessbase has a problem with NULL moves is the move allows an illegal position, ie, the side trying NULL move is in check.  
  > **username_2**: @FredKnight Gosh! There's a surprise.  
  
  ---
  
  ### Answer by username_1 on 2018-04-18. Score: 0
  
  The notion of null-move is implicit to orthodox chess problem theory, and all specialist chess problem software will support it.
  
  Firstly there is the notion of threat. After White plays a move in a conflict format (direct or self mate) the first consideration if there is no check is what would happen if White moved again immediately. Then the Black moves which would avert the threat are the only defences which need to be considered.
  
  The second notion applies to helpmates as well. This is set play, where it is assumed that the first player misses their first move. Often the play contrasts the mainline play thematically.
  
  
  ---
  
  