Chess Traps #6: Blackmar-Diemer Gambit (Halosar Trap)

Hello everybody! It’s jrobi! I wanted to go
over a nice little trap in the Blackmar-Diemer Gambit lines, and it
is called the Halosar Trap. And I think you will have a lot of fun
with this trap, even if you are not regularly a D4 player. So I am just
going to dive right into it here. So, as white we are going to open up
with pawn to D4. And if black plays pawn to D5, this is going to let
us get into the Blackmar-Diemer Gambit lines by thrusting
our own pawn forward now to E4. So we are offering this pawn up here on E4,
and there is not really a way that we are going to be able to get it
back right away. So black, nine times out of ten, is just going to capture
that pawn. And from this position we are going to play our knight
up now to C3, so we are going to attack it. Now black is going to
do a development move to defend that pawn by playing Knight up to F6.
And we are going to push our F pawn up now to F3. Black will capture.
And generally speaking, in the main lines, the knight would take here
on F3. But, for the trapping lines we are going to play Queen
takes on F3. Now what this is doing of course is it is leaving our pawn
hanging here on D4. And we actually want black to come and capture
that pawn, which it probably will do. So when black comes down
to take that pawn, we are going to develop our bishop now to E3, we
are going to kick that Queen away! And the Queen is going to go over to
B4, attacking the undefended pawn here on B2, and it is also
pinning down the Knight to the King – so it’s a nice little move that
black will probably find relatively easily, and play that. And from
this position here, we are going to castle. Now this probably looks a
little dubious because by castling we are giving black the option to
bring the bishop down now to G4, and that is going to skewer our Queen
and our rook! But that is exactly what we want black to play, so
if black does play that strong looking move with Bishop to G4, black
has just unleashed the flood gates for the Halosar Trap! Because
after this, we can play a very nice move, Knight to B5! And just take
a look at the position that this creates! First of all we have this monstrous Rook sitting
on D1, bearing down all along the D-file, hemming
in the black King here on E8. We have our Bishop on F1 defending the
Knight here, and of course this Knight is threatening checkmate in one
move by capturing the pawn on C7! So black has to do something about
this. Now black can’t just capture the Queen. Let’s say that black says
okay, well I am just going to get this piece off because my Bishop is attacking
your Queen! Well that is not a problem because we get to take
the Queen with check! So that means our Queen is going to be able to
get to safety, and black just drops a Queen! So there is a nice little
subtle trap there that your opponent might fall into. But if your
opponent doesn’t fall into that, probably what your opponent’s going
to play in this position is Knight to A6. Now, Knight to A6 of course
is defending the pawn here on C7, so what are we going to play in this
position? Well from here we are going to snag up the pawn on B7, we
are attacking the rook here on A8 and we are also attacking the Knight
here on A6. And once again black has got some big decisions to make!
If, for example, black moves the rook over to C8 because the rook
is defended by the Bishop, he just drops a piece on A6 and we are going
to be fine because our rook cannot be taken because if black comes
down to take our rook, we just capture the rook here and it is game
over! So black definitely cannot play that! So facing this position
what black will probably play is something like Queen to E4, wanting
to get the Queens off the table. But from here we are just going to
continue now Queen takes Knight on A6, and when black takes our Bishop
with check here on E3, we just need to swing our king over to safety
on B1. And of course the beauty of the position is that we are
still threatening checkmate with this Knight here sitting on B5 taking
the pawn on C7! So black has to do something about that, so black will
move its Queen over now to C5 to defend that pawn, and we are simply
going to develop our Knight now to F3, and what we are doing is we are
taking away this Bishop’s scope to attack our rook on D1. Now black has another
threat in this position, B7 is a monstrous square! If we can get our
Queen onto B7, well we can capture with check and then win the Queen!
So from here black has to defend against that, maybe rook to B8 to take
away this square from the Queen, and we are going to win the A7
pawn in this position by capturing with our Knight. Play could continue
as follows, black can play Queen over now to B6. We are just going
to trade the Queens off now, and we are sitting pretty here with the
passed pawn once we hit the check here on B5! So we got a passed pawn
on the A-file, very active pieces, we have connected rooks; black’s
position is just garbage! So it is a very nice trapping line,
with a lot of subtle possibilities all along the way for other
traps that could win the opponents Queen, and cause the opponent to
lose the game even quicker! So I found that the Halosar Trap was definitely
very interesting. I think, like I said at the beginning, you are going to
have a lot of fun with this whether you play D4 or not as your opening
move. Especially in your blitz games, you know just try it out and
see what you can make happen! So take care, hope you have a great
New Year, and we will see you next time!

100 thoughts on “Chess Traps #6: Blackmar-Diemer Gambit (Halosar Trap)

  1. i'm unfamiliar with the term 'pass-pawn' (you used it to describe the A2 pawn towards the end of the video) could anyone explain?

  2. @ohsomecustard
    A pass pawn is a pawn that can reach the 8 file (for white) without any possible interference from enemy pawns,

  3. @ohsomecustard
    A pass pawn is a pawn that can reach the 8 file (for white) without any possible interference from enemy pawns,

  4. Thanks for the vid. I tried it out and opponent played Qe5 instead of Qb4. How would you continue your line? I think with this move he pretty much escaped the trap, because his queen defends the c7 pawn, now. Am I right or is there any chance to continue without beeing hopelessly behind?

  5. What if after the castling of white Black doesn't move his light squared bishop but instead moves his e7 pawn? anyone suggestions?

  6. I tried this opening. My opponent did everything you said he would, UNTIL I developed my c bishop to e3. Instead of moving his queen over to b4, he moved it over to g4 and challenged my queen.

    What do you suggest I do at that point?

  7. what if the rock goes to d8 at 2:55, if you didn't take a rock with rock you are mate and if you did, you are out of material.

  8. Its a shame you have so little subscribers. Your videos are amazing and I really appreciate your work. Keep up the good work.

  9. I still managed to pull this checkmate out but I it took a few extra moves. What would you do if Black pulls the bishop out early to attack the queen after it takes the first pawn?

  10. Just defeated two opponents on ChessJam and one was exactly the same moves as shown in the video…. I just fall in love with this trap…. 😀

  11. i think that 13.Nxa7 is not a good move to can take the pawn but after 13…Ra8, you lose your knight.a knight for a pawn, not a good trade to make.

  12. Emil Josef Diemer himself ended up in the position at 1:30 no less than 8 times, and he won all 8 games. 3 of those times, Black had played 7…Bg4? In all, Diemer had an 89.2% score over 368 games playing the Blackmar-Diemer Gambit.

    One little thing, it is actually better to play 12.Qb7, leading to 12…Bxd1 13.Qxa8+ Kd7 14.Nc3 and Black cannot save his bishop, otherwise White starts a brutal attack on the king.

  13. @Crazychris215 A passed pawn is a pawn that has no enemy pawns that can prevent it from advancing up the board. They are useful since the opponent must use other pieces to stop the pawn from promoting.

    At 4:07, there are no black pawns on the a or b-file, and therefore no black pawns that can blockade or capture the white a-pawn on its way up.

  14. After Qxb7, if black plays Rc8, white can play Nxc7+ and black is forced to play Nxc7 giving up his queen, taking the knight on a6 is a weak move actually

  15. i think instead of …Qb4, …Qe5 for black holds the position pretty well as black is up 2 pawns and just needs to get his king out of the center quickly (maybe e6, bd6, 0-0, etc.. probly involving Na6 to defend the c7 pawn against Nb5 and/or Bf4 ideas by white)

  16. @Crazychris215 a past pawn is a pawn that has no opposing pawns on the file in front of it, or on an adjacent file –> much easier to promote

  17. For e4 players who hate the Scandanavian it's worth noting you can transpose into this gambit after e4 d5.

  18. still working on this one but it is good. have mated one higher ranked player in few moves on a variant, and beat many lower rankers. still getting all the variations down pat, but the foundation opens up some good traps.

  19. Totally love this gambit. I've only been using it a few days (great results) but it seems to make me think aggressively regardless of various responses that aren't exactly like the video. By following some of the same basic principals (ex, the queenside castle) moves just seem to crop up to keep up pressure on black, stop his development or ruin his overall position.

  20. @Einfrein It's tough to determine this, but if black lets the white knight take the pawn so that black can capture the rook, it's going to cost black time to regain his position. You can see that if white captures the pawn, the black king would move to the gray square (not white square or else white brings his bishop into play). Then the white knight would capture the rook, and with that knight in the corner the black queen can no longer move back to defend its king on those gray squares.

  21. This is not an "awesome" game for white, only a marginal positionally better game that will take a lot of next right moves.

  22. @inscrustable67 Sorry i meant Qc6 + .Indeed, after if Kd8, Qc7+, Ke8, Nd6+,exd6, Bb5+, Kd7, Qxd7 mate. If after Qc6+, Kd7, Qxa8+ , Kb8, Qb8+,Kd7, Qxc7+ then if 1/ Ke8, Qc8 mate 2/Ke6 after Bd3 white are really better with the king in the center

  23. The trap isnt exactly functional, because after the knight move going for checkmate, black can simple go knight to a6. If queen takes b7 then rook to b8 and the game is totally equal.

  24. @Dymdez Not quite. Queen can take night on a6.
    They are a piece up at that point. Whites bishop on F1 supports supports whites knight on b5 along with his queen.

    Not as effective as a mate, but your still a piece up in early game.

  25. @pyropope no because black's rook attacks queen, queen takes knight on a6 then blacks queen captures white knight on b5, black is a pawn up plus the white rook is en prise, trust me ive played this position many times lol

  26. @frank5686 I think it wouldn't be a good move for black as white then can move Queen to C6 (check). best move for black would be Knight to D7.. Queen captures Rock (a8) has to move Knight to B8 > queen captures again (B8)..king has to move to D7.. Queen captures pawn on C7.. white then will have advantage!!

  27. @BackToNature79
    I see, that is true. Thank you 😛

    I commented this a while back when I wasn't very good, but I would've seen this now 😉

  28. @FAMTITIS I disagree he gains position when he checks white king! but its in no way or means over! I believe this is one of the best things black can do!

  29. @frank5686 it will lead to checkmate in 6 (most cases)
    1.. Bxd1 2. Qc6+ Kd8 3. Qxc7+ Ke8 4. Nd6+ exd6 5. Bb5+ Nd7 6. Qxd7#

  30. @pavopete Ahh, I stand correct, excellent variation. Ok, then instead of rook attacks queen which clearly sucks, 9 …Qe4 seems to force an equal game

  31. @frank5686 3:33
    Theres alot that can be done but the most deadly:
    If Black: bishop takes rook d1
    then White: queen c6 check
    forced Black: king d8 (if black blocks with knight then taking rook is suicide for black)
    now White: queen takes c7 check forcing the black king back to e8
    and now a clever tactic white plays knight to d6 check
    King cannot go anywhere and if the pawn captures the knight then the white bishop comes to b5 for check.
    The black pieces cannot prevent checkmate.

  32. After 10..Qe3+ 11. Kb1 Qc5, why not play 12. Qb7 instead? He can't play the rook anywhere so he will have to play 12..Bxd1 13. Qxa8+ Kd7 14. Nc3 which defends the mate , attacks the bishop and opens up Bb5+. I think white has an incredible attack here unless I'm missing something.

  33. It isn't necessarily checkmate, but with proper play from black, he will win due to the huge material gain.
    If Bxd1, then Qc6+… Forcing Kd8.
    Then, Qxa8+, forcing either Nb8 or Kd7, If Nb8, it will be followed by Qxb8+ followed by Qxc7, you can work it out from there. If Kd7, then simply Kxd1, ahead an entire bishop. Furthermore, white has the threat Qxa7, which will win the knight or else practically lose… As if Nb8, again Qxb8, same scenario.

  34. then u capture knight ? and u still can threat alot of things, so stfu if u dont know what u are talking about.

  35. Why would black take f3 with e4? Couldn't he just play bishop to f5? This way he could develop his light square bishop and protect his pawn in e4 at the same time…

  36. at 2:54 can't white just give check with the knight with a discovered attack on black's queen which is hanging on b4?

  37. Right now I'm playing this opening with someone, I got up to Qxf3 and my opponent probably caught what I was doing and played e5. I'll send you the whole game after we're done if you're interested.

  38. At 4:45, why can't the bishop take the free rook? There is not a checkmate threat for black if he does so.

  39. thanks jrobi.but @3:16 i was left a little confused, what if black captures white rook with bxd1 and ignores the the white bishop on e3 altogether. surely whites queen wouldnt be able to check on c6 as the black queen would have that square protected?.from here i dont see any comeback for white if the black queen ignores the temptation of capturing the white bishop on e3.please correct me if i'm missing something. and thanks for d video!!

  40. The Queen move for black to c5 to defend the pawn on c7 I am not understanding why instead the bishop doesn't take the rook on d1. The white knight can only threaten with Check and not mate

  41. Ran this through HIARCS and found a better move at 2:54 9) …Rc8, Nxc7+ with a discovered attack on blacks queen. HIARCS rating after this move is +4.62, if black exchanges the bishop for the rook it improves to +5.61. Black may as well resign.

  42. 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Qxd4 6. Be3 Qb4 7. O-O-O Bg4 8. Nb5 Na6 9. Qxb7 Qe4 10. Qxa6 Qxe3+ 11. Kb1 Qc5 12. Qb7 Rd8 13. Nxc7+ Qxc7 14. Bb5+ Qd7 15. Nf3

  43. wrong no suicide what if :
    1. black takes rook d1 with bishop g4
    2. white queen c6 check
    now 3. black knight d7
    4. white queen takes roook a8 check
    5. black moves knight to b8
    doesnt matter if white queen takes it king can escape

  44. what if instead of taking the f pawn just defend the black e pawn with bishop(1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 Bf5), how should white continue?the engine says g4 and than black is slightly better.

  45. 1:38 light square bishop to d7 kind of ruins this whole trap. if he defends b5 square it is over for black

  46. Hi – very nice for a fast game 🙂
    At the end of the video you state that "we have a pas pawn" on the A file?
    Is that an expression for a pawn that can move forward to the end line without confrontation from opponents pawn?

  47. Fun as the Halosar Trap may be, the Ryder Gambit to which it belongs is unsound and if your opponent avoids the trap and fends off the gambit initiative, you're in deep trouble.

    So it's more instructive than useful if anything.

    I would cover traps in the standard Blackmar-Diemer with Nxf3. Welling's Line and Bennett's Temptation are major ones–there's one or two traps against Black for each defensive line.

  48. I do love this gambit and play it a lot, however. I usually do D1, NC3, E4, though as it provides more flexibility and allows you to switch into other stronger openings.

Leave a Reply

Your email address will not be published. Required fields are marked *