MESON Chess Problem Database

Problem Display
PID: 240456 (bbk5/1Rp2K2/8/3Q4/8/8/8/8 w - - 0 1)

Parkhomenko, Nikolai A

Problemist Pribuzhya, 1992

bbk5/1Rp2K2/8/3Q4/8/8/8/8

#2

3 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c5
      • 2.Qd7#
    • 1...c6
      • 2.Qd7#
  • Tries
    • 1.Ke6?
      • 1...Bxb7
        • 2.Qd7#
      • 1...c6
        • 2.Qd7#
      • 1...c5
        • 2.Qd7#
      • 1...Ba7!
    • 1.Ke7?
      • 1...Bxb7
        • 2.Qe6#
        • 2.Qg8#
        • 2.Qf5#
        • 2.Qd7#
        • 2.Qd8#
      • 1...c6
        • 2.Qd7#
      • 1...c5
        • 2.Qd7#
      • 1...Ba7!
    • 1.Ke8?
      • 1...Bxb7
        • 2.Qe6#
        • 2.Qf5#
        • 2.Qd7#
        • 2.Qd8#
      • 1...c6
        • 2.Qd7#
      • 1...c5
        • 2.Qd7#
      • 1...Ba7!
    • 1.Qe6+?
      • 1...Kd8
        • 2.Rxb8#
        • 2.Qe8#
      • 1...Kxb7!
    • 1.Qf5+?
      • 1...Kd8
        • 2.Rxb8#
      • 1...Kxb7!
  • Keys
    • 1.Qc6!
      • 1...Kd8
        • 2.Rxb8#
        • 2.Qe8#
      • 1...Bxb7
        • 2.Qe8#
      • 1...Ba7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • P(a);::QAB1(A)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • B(b);SBLOCK,XR(B)::QAB1(A)
        • P(a);::QAB1(A)
      • Refutation
        • B(c);
    • Try
      • K(C);P-FLIGHT
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • B(c);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • P(a);::QAB1(A)
      • Refutation
        • B(c);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(d);S_FLIGHT,XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);P-FLIGHT::R(B),XB(c)
      • Refutation
        • K(d);S_FLIGHT,XR(B)
  • Actual
    • Q(A);P_PINP(a)
    • Vars
      • B(b);SBLOCK,XR(B)::QAR2(A)
      • B(c);N_GUARD::QAR1(A),XP(a)
HTML5 logo

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).