The mandarin stared bewildered on the chess board after Li Chai finished his winning move:

first game

1. d4 d5 2. Qd3 Qd6 3. Qf5 Qf4 4. Qxc8#

But it didn't last for long. He grabbed his queen and repeated Li Chais last move while announcing:

What kind of mate is that, if I can mate you as well?

This was of course against the rules, but Li Chai stayed calm and started the second game.

How did Li Chai win the second game?

The rules (same as in part 1):

  • standard chess rules apply, if not stated otherwise
  • you play white and your opponent copies all your moves (e.g 1. e4 would be followed by 1. ... e5)
  • you are allowed to make "stupid" moves, your opponent will copy all moves regardless how bad they are
  • you are not allowed to make moves which cannot be copied, of course except for the last move winning the game

New rule:

  • make it impossible for the mandarin to repeat the mating move

The limit for this part is 7 moves.

  • $\begingroup$ This could also be posted on the Chess Stack Exchange. $\endgroup$ – user477343 Jul 2 '18 at 3:18

This is new for me and I'm not sure but this seems to work:

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1. d4 d5 2. e4 e5 3. d:e5 d:e4 4. Bg5 Bg4 5. Q:d8#

  • $\begingroup$ @Sleafar, let me guess, now mandarin will eat his pawn with his king? $\endgroup$ – klm123 Apr 9 '16 at 12:58
  • $\begingroup$ Nope. :) $\endgroup$ – Sleafar Apr 9 '16 at 13:01
  • $\begingroup$ Oh, so the last move can be anything (legal)? $\endgroup$ – Anonymous Mar 20 '17 at 8:50
  • $\begingroup$ @Anonymous, what do you mean? Last move must be checkmate. $\endgroup$ – klm123 Mar 20 '17 at 9:20
  • $\begingroup$ I mean I thought the last move must be also copied. $\endgroup$ – Anonymous Mar 20 '17 at 9:35

Also, if you want to use exactly $7$ moves, then:

1. e4, e5. 2. Nf3, Nf6 3. Nxe5, Nxe4 4. d4, d5 5. Qh5, Qh4 6. Bg5, Bg4 7. Qf7#

  • $\begingroup$ Sorry, but the mandarin would simply repeat the move: Qf3. Please read the question carefully, especially the new rule. $\endgroup$ – Sleafar Nov 18 '17 at 5:57
  • $\begingroup$ @Sleafar : I suppose the point is that 7...Qxf2 wouldn't be a "counter-mate", because the queen can be taken by White's Qf7. $\endgroup$ – Evargalo Oct 4 '18 at 15:33

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