MESON Chess Problem Database

Problem Display
PID: 251206 (8/3PK3/3Rp3/2k5/Q7/1r6/8/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kozhakina, Alena Vladimirova

Comm., Uralski Problemist-20 JT, 2013

8/3PK3/3Rp3/2k5/Q7/1r6/8/8

#2

4 + 3

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qc6#
    • 1...Rb5
      • 2.Qd4#
  • Tries
    • 1.Qa5+?
      • 1...Rb5
        • 2.Qc3#
      • 1...Kc4!
    • 1.d8Q?
      • threat
        • 2.Rc6#
        • 2.Qc7#
        • 2.Qc8#
      • 1...Rb5
        • 2.Qc7#
        • 2.Qd4#
        • 2.Qc8#
      • 1...Rb6
        • 2.Qxb6#
      • 1...Rb8
        • 2.Rc6#
        • 2.Qc7#
      • 1...Rb7+!
  • Keys
    • 1.d8S!
      • threat
        • 2.Sxe6#
      • 1...Rb7+
        • 2.Sxb7#
      • 1...Rb4
        • 2.Qc6#
      • 1...Re3
        • 2.Sb7#
      • 1...e5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(a);SBLOCK::QAR1(A)
    • R(a);SBLOCK::QAB1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a),SBLOCK::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • P(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(a);N_GUARD::QAB1(C),XR(a)
      • Refutation
        • R(a);CHECK
  • Actual
    • P(C);
    • Threat
      • S(C),XP(c)
    • Vars
      • R(a);CHECK,N_GUARD::S(C),XR(a)
      • R(a);SBLOCK::QAR1(A)
      • R(a);N_GUARD::S(C)
      • P(c);::S(C)
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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).