MESON Chess Problem Database

Problem Display
PID: 262381 (1R6/2Qp4/2p5/2k3p1/5pN1/1P3K2/1P6/8 w - - 0 1)

Khalife, Georges

Europe Echecs, 1959

1R6/2Qp4/2p5/2k3p1/5pN1/1P3K2/1P6/8

#2

6 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd6#
    • 1...Kd5
      • 2.Qe5#
  • Tries
    • 1.Rb5+?
      • 1...Kd4
        • 2.Qd6#
        • 2.Qxd7#
      • 1...Kxb5!
    • 1.Qxf4?
      • 1...Kd5
        • 2.Qe5#
      • 1...d5
        • 2.Qb4#
        • 2.b4#
      • 1...d6
        • 2.Qc4#
      • 1...gxf4!
    • 1.Qa5+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kd4!
  • Keys
    • 1.Rb4!
      • 1...Kxb4
        • 2.Qb6#
      • 1...Kd5
        • 2.Qe5#
      • 1...d5
        • 2.Qe7#
      • 1...d6
        • 2.Qa5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(b);N_GUARD,N_SPINP(d),S_FLIGHT::QAR2(E)
    • K(b);N_SPINP(d),P-FLIGHT,S_CUTP(e)::QAR1(E)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • K(b);N_SPINP(d),P-FLIGHT,XR(F)
    • Try
      • Q(E);N_PINP(d),XP(a)
      • Vars
        • K(b);P-FLIGHT,S_CUTP(e)::QAR1(E)
        • P(e);SBLOCK::QAR1(E)
      • Refutation
        • P(c);XQ(E)
    • Try
      • Q(E);CHECK,N_PINP(d)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(F);
    • Vars
      • K(b);N_GUARD,N_SPINP(d),S_FLIGHT,XR(F)::QAR2(E)
      • K(b);N_GUARD,N_SPINP(d),P-FLIGHT,S_CUTP(e)::QAR1(E)
      • P(e);OGATE,SBLOCK::QAB(E)
      • P(e);SBLOCK::QAR2(E)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).