Answers.Body: <p>With the exception of Hans Kmoch's attempt to give it a name, which never caught on (I have never seen anyone else use it anywhere), they really do not have a name that I have even seen.</p>
  
  <p>I probably have seen this referred to mostly as "two opposing pawns", but that is really just English rather than a specific chess term.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T00:05:14.893Z
Answers.LastActivityDate: 2020-02-28T00:05:14.893Z
Answers.UserDisplayName: PhishMaster
Answers.Body: <p>According to <a href="https://www.chess.com/forum/view/chess-equipment/pawn-power-in-chess-by-hans-kmoch-glossary-of-terms" rel="noreferrer">this post</a>, pawns that block each other are called a "ram".</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T00:13:03.997Z
Answers.Text: I made a comment about that. Kmoch certainly gave it a name, but if you look through his list of items he gave names to, you will see how strange most of them are, and how very few caught on. The only ones I see in that list that are common are "backward pawn", which he gave his own crazy name to also, "chain", "center pawn", "double pawns", "doubling/undoubling" (which is just English), "passed pawn", "outside passer", "protected passer", and "wing pawn". Those all predated his book, but then, he made up a BUNCH of stuff, and I can see that any of it really caught on. If it doesn't catch on,
Answers.UserDisplayName: PhishMaster
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T00:14:07.523Z
Answers.Text: is it really what something is called? I would say overall, no, since no one uses the term "ram". All that said, I am not saying that your answer is incorrect, but it is a matter of opinion, and can go either way.
Answers.UserDisplayName: PhishMaster
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T00:25:56.310Z
Answers.Text: @PhishMaster The term is also used at https://www.chessprogramming.org/Pawn_Rams_(Bitboards)
Answers.UserDisplayName: D M
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T00:43:05.683Z
Answers.Text: I am not saying that no one possibly ever uttered that word in that context, after all, he wrote what was probably the first book dedicated to pawn play, but I am saying that it never REALLY made it into widely-accepted chess vernacular. I would also point out that the site you quoted, although the origin is clear, they are using it more in a programing chess context, rather than about chess play.
Answers.UserDisplayName: PhishMaster
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T04:12:30.277Z
Answers.Text: I'll agree that I never heard of it before, and while searching *did* bring it up, the search doesn't reveal nearly as many mentions as it would if it were widely used by the chess community.
Answers.UserDisplayName: D M
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T12:59:21.017Z
Answers.Text: This is decently common terminology in the computer chess community, I believe (hence the chessprogramming.org mention).
Answers.UserDisplayName: Allure
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-27T23:31:50.423Z
Answers.LastActivityDate: 2020-02-27T23:31:50.423Z
Answers.UserDisplayName: D M
Answers.Body: <p>For the scenario where one pawn is on the second rank and the other is its sixth rank but cannot be captured by a pawn on an adjacent file, YouTube vlogger Kingscrusher coined the term "thorn pawn".  The chess engine Leela Zero seems to establish thorn pawns quite frequently as part of its strategy, and they can be amazingly effective at limiting enemy mobility.  If e.g. Black has castled kingside and the king is at g8, a thorn pawn at g6 can make it impossible for Black to establish f7, g7, or h7 as escape squares.  If White keeps a rook ready to pounce on the eighth rank, Black will have to keep a rook <em>on</em> the eighth rank.  Unless or until Black can resolve that situation, White's thorn pawn will enormously upgrade the playing strength of White's rooks and downgrade the playing strength of Black's.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-28T19:49:51.007Z
Answers.LastActivityDate: 2020-02-28T19:49:51.007Z
Answers.UserDisplayName: supercat
Answers.Body: <p>I think what you're asking about is referred to as a "blocked pawn".  There is <a href="https://chess.stackexchange.com/questions/2529/exact-definition-of-a-blocked-pawn">another question</a> here that asks basically the same question, except in reverse...  A pawn can also be blocked by another of the opponent's pieces, rather than another pawn.  In either case, it can't make any progress unless the pawn/piece blocking it somehow goes away, or unless an opportunity arises for it to capture on an adjacent file.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-27T23:30:12.900Z
Answers.Text: But a blocked pawn could be blocked by other things, like a knight.
Answers.UserDisplayName: D M
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-27T23:32:07.520Z
Answers.Text: True - I edited my answer to reflect this.
Answers.UserDisplayName: patbarron
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-02-27T23:29:24.663Z
Answers.LastActivityDate: 2020-02-27T23:31:42.260Z
Answers.LastEditDate: 2020-02-27T23:31:42.260Z
Answers.UserDisplayName: patbarron
Body: <p>When a white pawn and a black pawn are touching on a file, what is it called?</p>
  
Tags: <pawns><pawn-structure><terminology>
Title: What is it called when opposite colored pawns up against each other?
ThreadText: # What is it called when opposite colored pawns up against each other?
  
  (Asked by: username_0 on 2020-02-27)
  
  When a white pawn and a black pawn are touching on a file, what is it called?
  
  **Tags:** pawns, pawn-structure, terminology
  
  
  ---
  
  ## 4 answers
  
  ### Answer by username_5 on 2020-02-27. Score: 8 | Accepted answer
  
  I think what you're asking about is referred to as a "blocked pawn". There is [another question](https://chess.stackexchange.com/questions/2529/exact-definition-of-a-blocked-pawn) here that asks basically the same question, except in reverse... A pawn can also be blocked by another of the opponent's pieces, rather than another pawn. In either case, it can't make any progress unless the pawn/piece blocking it somehow goes away, or unless an opportunity arises for it to capture on an adjacent file.
  
  > **Comments:**
  > **username_2**: But a blocked pawn could be blocked by other things, like a knight.  
  > **username_5**: True - I edited my answer to reflect this.  
  
  ---
  
  ### Answer by username_1 on 2020-02-28. Score: 12
  
  With the exception of Hans Kmoch's attempt to give it a name, which never caught on (I have never seen anyone else use it anywhere), they really do not have a name that I have even seen.
  
  I probably have seen this referred to mostly as "two opposing pawns", but that is really just English rather than a specific chess term.
  
  
  ---
  
  ### Answer by username_2 on 2020-02-27. Score: 4
  
  According to [this post](https://www.chess.com/forum/view/chess-equipment/pawn-power-in-chess-by-hans-kmoch-glossary-of-terms), pawns that block each other are called a "ram".
  
  > **Comments:**
  > **username_1**: I made a comment about that. Kmoch certainly gave it a name, but if you look through his list of items he gave names to, you will see how strange most of them are, and how very few caught on. The only ones I see in that list that are common are "backward pawn", which he gave his own crazy name to also, "chain", "center pawn", "double pawns", "doubling/undoubling" (which is just English), "passed pawn", "outside passer", "protected passer", and "wing pawn". Those all predated his book, but then, he made up a BUNCH of stuff, and I can see that any of it really caught on. If it doesn't catch on,  
  > **username_1**: is it really what something is called? I would say overall, no, since no one uses the term "ram". All that said, I am not saying that your answer is incorrect, but it is a matter of opinion, and can go either way.  
  > **username_2**: @username_1 The term is also used at https://www.chessprogramming.org/Pawn_Rams_(Bitboards)  
  > **username_1**: I am not saying that no one possibly ever uttered that word in that context, after all, he wrote what was probably the first book dedicated to pawn play, but I am saying that it never REALLY made it into widely-accepted chess vernacular. I would also point out that the site you quoted, although the origin is clear, they are using it more in a programing chess context, rather than about chess play.  
  > **username_2**: I'll agree that I never heard of it before, and while searching *did* bring it up, the search doesn't reveal nearly as many mentions as it would if it were widely used by the chess community.  
  > **username_3**: This is decently common terminology in the computer chess community, I believe (hence the chessprogramming.org mention).  
  
  ---
  
  ### Answer by username_4 on 2020-02-28. Score: 2
  
  For the scenario where one pawn is on the second rank and the other is its sixth rank but cannot be captured by a pawn on an adjacent file, YouTube vlogger Kingscrusher coined the term "thorn pawn". The chess engine Leela Zero seems to establish thorn pawns quite frequently as part of its strategy, and they can be amazingly effective at limiting enemy mobility. If e.g. Black has castled kingside and the king is at g8, a thorn pawn at g6 can make it impossible for Black to establish f7, g7, or h7 as escape squares. If White keeps a rook ready to pounce on the eighth rank, Black will have to keep a rook *on* the eighth rank. Unless or until Black can resolve that situation, White's thorn pawn will enormously upgrade the playing strength of White's rooks and downgrade the playing strength of Black's.
  
  
  ---
  
  