If both players cooperate, what is the quickest mate in chess that includes a Queens exchange, in a legal game?

  • 1
    $\begingroup$ What's the exact definition of a "Queens exchange"? $\endgroup$
    – Dr Xorile
    Jan 8, 2022 at 19:25
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    $\begingroup$ @DrXorile "both queens get taken" is the only definition I can think of. That's the usual meaning, at least. $\endgroup$
    – Bass
    Jan 8, 2022 at 19:58
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    $\begingroup$ @DrXorile more precisely, both queens are captured on consecutive moves. $\endgroup$ Jan 8, 2022 at 21:03
  • $\begingroup$ @DanielMathias Why consecutive? There are many cases in actual chess games where you might take a tempo, e.g. to check, before taking a hanging queen. $\endgroup$
    – brianpck
    Jan 9, 2022 at 5:25
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    $\begingroup$ @brianpck Good point. Of course, my intent was to exclude unrelated queen captures. $\endgroup$ Jan 9, 2022 at 6:23

2 Answers 2


Black can mate in



1.b3 a5 (h5 also works) 2.Ba3 Ra6 3.Qc1 Rc6 4.Bxe7 Rxc2 5.Bxd8 Rxc1#



Old answer:

Two more in

5 1/2

1.e4 e5 2.d4 f5 3.Qh5+ g6 4.Be2 Qg5 5.Bxg5 gxh5 6.Bxh5#


1.Nc3 e5 2.d4 exd4 3.Bg5 dxc3 4.Qxd7+ N or B or Q or Kxd7 5.Rd1 N or B or Q or K moves back to where they came from 6. Rxd8#

  • 1
    $\begingroup$ Would we say that's a "Queen Exchange"? $\endgroup$
    – Dr Xorile
    Jan 8, 2022 at 19:24
  • $\begingroup$ I would not consider the new solution to have a queen exchange. The queens must be captured on consecutive moves, otherwise they are independent losses. $\endgroup$ Jan 8, 2022 at 21:08
  • 2
    $\begingroup$ That's a rather narrow view, though I can see how it is tricky to come up with a more flexible definition in a cooperative setting. Anyway, it's easy enough to fix ... $\endgroup$
    – loopy walt
    Jan 8, 2022 at 22:56
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    $\begingroup$ Agreed. As pointed out in comment above, it isn't strictly necessary for the captures to be on consecutive moves. In any case, your revision certainly qualifies. $\endgroup$ Jan 9, 2022 at 6:25

I don't know if this is the quickest way, but here's a mate in 6:

  1. c4 c5 2. Nc3 Nc6 3. Qb3 Qb6 4. Qxb6 axb6 5. Nb5 Nd8 6. Nc7# 1-0

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