Brain teaser: Checkmate in 11

8 comments

• Reply

  

  M.Pasman says:

  February 1, 2011 at 7:42 am

  I think, the main variation is :

  1.Qb6+ Ke8 2.Bf7+! Kxf7 3.Ng5+ Ke8

  (3…Kg8 4.Qd8+ Nf8 5.Qxf8+ and 6.Rd8+)

  4.Rxe7+ Kxe7 5.Qe6+ Kd8 6.Nf7+ Kc7 7.Qd6+ Kb7 8.Nd8+ Ka7 9.Qc7+ Ka6 10.Rd6+ Nb6 11.Qxb6 mate

• Reply

  

  Anonymous says:

  February 1, 2011 at 8:23 am

  let´s see:
  1. Qb6+ Ke8
  2. Bf7+ Kxf7 (2. … Kf8, 3. Qd8+, Kxf7, 4. Rxf7+, Kf6, 5. Rf5+, Kf7, 6. Ng5+)
  3. Ng5+ Kg8
  4. Qd8+ Nf8
  5. Qxf8+ Kxf8
  6. Rd8+ Re8
  7. Rxe8#
  how can black last 11 moves? if
  3. … Kf8, then
  4. Rd8+ Re8
  5. Rxd8#. but if
  3. … Ke8, then
  4. Rxe7+ Kxe7
  5. Qe6+ Kf8
  6. Qf7#. and if
  5. … Kd8, then
  6. Nf7+ Kc7
  7. Qd6+ Kb7
  8. Nd8+ Ka7
  9. Qc7+ Ka6
  10. Rd6+ Nb6
  11. Qxb6#. so it´s true! 11 moves indeed! nice one.
  greets, jan

• Reply

  

  Anonymous says:

  February 1, 2011 at 11:28 am

  Way too hard for me.

• Reply

  

  Anonymous says:

  February 1, 2011 at 11:28 am

  Black’s best try is:

  1 Qb6 Ke8
  2 Bf7 Kf7
  3 Ng5 Ke8
  4 Re7 Ke7
  5 Qe6 Kd8
  6 Nf7 Kc7
  7 Qd6 Kb7
  8 Nd8 Ka7
  9 Qc7 Ka6
  10Rd6 Nb6
  11Qb6 mate

• Reply

  

  Consul says:

  February 1, 2011 at 12:13 pm

  I was thinking at first to sacrifice the queen, then i saw that the knight wants to go to g5, and i couldn’t deny him this right! So:
  1. Qb6+ .. Ke8
  2. Bf7+ .. Kxf7
  otherwise Qd8+ and mate in less moves!
  3. Ng5+ .. Ke8
  otherwise Qd8+
  4. Rxe7+ .. Kxd7
  5. Qe6+ .. Kd8
  6. Nf7+ .. Kc7
  7. Qc6+
  8. Nd8+
  9. Qc7+
  10. Rc6+
  11. Qxb6#

  But… what about 1. Qxd7+? Does White still win?

• Reply

  

  Timothée Tournier says:

  February 1, 2011 at 12:40 pm

  1.Qb6+ Ke8 2.Bf7+

  I)2…Kf8 3.Qd8+ Kxf7 4.Rxe7 Kf6 5.Rf7++ Kxf7 6.Ng5 mate

  II)2…Kxf7 3.Ng5+

  a)3…Kg8 4.Qd8+ Nf8 5.Qxf8+ Kxf8 6.Rd8+ Re8 7.Rd or Rexe8 mate

  b)3…Kf8 4.Qd8+ Re8 5.Qxe8 mate

  c)3…Ke8 4.Rxe7+ Kxe7 5.Qe6+ Kd8 6.Nf7+ Kc7 7.Qd6+ Kb7 8.Nd8+ Ka7 9.Qc7+ Ka6 10.Rd6+ Nb6 11.Qxb6 mate

• Reply

  

  KNOCKOUT2010 says:

  February 1, 2011 at 1:12 pm

  How to “KNOCKOUT” king black in 11 steps for this game?

  1.Qb6+ Ke8
  2.Bf7+ Kxf7
  3.Ng5+ Ke8
  4.Rexe7+ Kxe7
  5.Qe6+ Kd8
  6.Nf7+ Kc7
  7.Qd6+ Kb7
  8.Nd8+ Ka7
  9.Qc7+ Ka6
  10.Rd6+ Nb6
  11.Qxb6#

  *** KO !!! Yeah… White WON !!!

  – High Skill From MR KO (Malaysian)

• Reply

  

  mateintwenty says:

  February 1, 2011 at 3:03 pm

  Qb6+ then Bxd7+ and the rest of the moves will play themselves