Puzzle: White Mates in 10?

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duder
Posts: 2
Joined: Sun Jun 24, 2007 6:33 pm

Puzzle: White Mates in 10?

Post by duder » Thu Jul 19, 2007 9:48 pm

The fastest mate that I could find at this position was white mating in 10 with:

1. Qc6+, Kb8 2. Bf4+, Bd6 3. Bxd6+, Rxd6 4. Qxd6+, Kb7 5. Qc6+, Kb8 6. Rg1, Qxd2+ 7. Kxd2, Nxc4+ 8. Ke1, Nd6 9. Rg8+ Nc8 10. Rxc8++

Can it be done any quicker?

Image

cnita
Posts: 36
Joined: Sat Jun 10, 2006 1:14 am
Location: Bucharest,Romania

White mate in 10 ?

Post by cnita » Thu Jul 19, 2007 10:27 pm

No

islanderfan
Posts: 880
Joined: Mon May 14, 2001 10:56 pm

Post by islanderfan » Thu Jul 19, 2007 10:54 pm

I am curious, in this case why would you give up your queen for the rook?6. Rg1, Qxd2+ wouldn;t you want to bring the king back by the king?

islanderfan
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Joined: Mon May 14, 2001 10:56 pm

Post by islanderfan » Thu Jul 19, 2007 10:54 pm

I am curious, in this case why would you give up your queen for the rook?6. Rg1, Qxd2+ wouldn;t you want to bring the king back by the king?

whitehorse
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Joined: Wed May 23, 2007 5:32 am

Post by whitehorse » Wed Aug 08, 2007 6:16 am

How about Bxb6, if Qxb6 then Qxd7+, Kb8 Qc8 checkmate!
Am I correct?

gregorgysi
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Joined: Thu May 11, 2000 7:57 am

Post by gregorgysi » Tue Aug 26, 2008 5:16 pm

@ whitehorse : Bxb6 and Bxb2+ and no checkmate in NEAR sight

jboger
Posts: 8
Joined: Tue Dec 16, 2008 3:44 pm

There's a mate in 7

Post by jboger » Wed Dec 17, 2008 6:55 pm

There's a mate in 7, but it's not easy to find at all, as the first move is not forcing. Should I go ahead and post it here, or leave it for others to find (given that I used a computer)?

PS. The computer actually found the mate in 10 before the mate in 7 -- it's that obscure.

langelli
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Joined: Tue Sep 21, 2004 11:29 am

Post by langelli » Wed Dec 17, 2008 10:54 pm

post it

jboger
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Joined: Tue Dec 16, 2008 3:44 pm

Post by jboger » Thu Dec 18, 2008 12:04 am

The first move is Rg1. From here it quickly gets complicated as black has many responses, most of which lead to shorter mates.

Code: Select all

1.Rg1 
  1...Bxd2+ 2.Kf1
    2...Qxb5 3.cxb5
      3...Kb8 4.Rg8+ 
        4...Rd8 5.Rxd8+ 
          5...Kc7 6.Bxb6+ 
            6...axb6 7.Qc8#
            6...Kb7 7.Qc6#
          5...Kb7 6.Qc6#
          5...Nc8 6.Qxc8#
        4...Nc8 5.Qxd7 any 6.Rxc8#
        4...Kb7/Kc7 5.Qc6#
      3...Kb7 4.Qc6+ Kb8 5.Rg8+
          5...Rd8 6.Rxd8+ Nc8 7.Rxc8#
          5...Nc8 Rxc8#
      3...Kc7 4.Qc6+
        4...Kb8 5.Rg8+
          5...Rd8 6.Rxd8+ Nc8 7.Rxc8#
          5...Nc8 Rxc8#
        4...Kc8 5.Rg8+ Ke7 6.Qe6#
      3...Bb4 4.Rg8+ 
        4...Kb7/Kc7 Qc6#
        4...Bf8 5.Rxf8 any 6.Qc6#
      3...Na8/Na4/Nc4/Kd8/d4/g5/Be1/Bxe3/Bc1/Bc3/Ba5 4.Rg8+ any 5.Qc6#
    2...Na8/Na4/Nxc4 3.Qxd7+ Kb8 4.Qc8#
    2...Qa3/Qb4 3.Rg8+
      3...Kb7/Kc7 4.Qc6#
      3...Qf8 4.Rxf8 any 5.Qc6#
    2...Bb4 3.Rg8+
      3...Kb7/Kc7 4.Qc6#
      3...Bf8 4.Rxf8 any 5.Qc6#
and so on, and that's just for 1...Bxd2+ (although I imagine the lines are similar without that.)

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