MESON Chess Problem Database

Problem Display
PID: 232966 (8/2r5/p7/1k6/3Q4/KN6/2B5/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Kudesnik, 1998

8/2r5/p7/1k6/3Q4/KN6/2B5/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rc6
      • 2.Qb4#
    • 1...Ra7
      • 2.Qc5#
    • 1...Rb7
      • 2.Qc5#
    • 1...Rd7
      • 2.Qc5#
    • 1...Re7
      • 2.Qc5#
    • 1...Rf7
      • 2.Qc5#
    • 1...Rg7
      • 2.Qc5#
    • 1...Rh7
      • 2.Qc5#
  • Tries
    • 1.Qd5+?
      • 1...Rc5
        • 2.Qxc5#
      • 1...Kb6!
  • Keys
    • 1.Bd3+!
      • 1...Kc6
        • 2.Sa5#
      • 1...Rc4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 9
  • Sets
    • R(c);N_GUARD::QAR1(D),XR(c)
    • R(c);SBLOCK::QAR1(D)
    • R(c);N_GUARD::QAR1(D)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAR1(D),XR(c)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • B(A);CHECK
    • Vars
      • K(a);S_FLIGHT::S(C)
      • R(c);P_SPINR(c)::QAR1(D)
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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).