MESON Chess Problem Database

Problem Display
PID: 229427 (1rk5/2p1K3/1p6/1P6/8/8/8/Q7 w - - 0 1)

Bryukhanov, Ivan Oleksandrovich

Sachova skladba, 2003

1rk5/2p1K3/1p6/1P6/8/8/8/Q7

#2

3 + 4

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.Qa6#
    • 1...Rb7
      • 2.Qh8#
    • 1...Ra8
      • 2.Qxa8#
  • Tries
    • 1.Qa7?
      • 1...Ra8
        • 2.Qxa8#
      • 1...c5
        • 2.Qd7#
      • 1...c6
        • 2.Qd7#
      • 1...Rb7!
    • 1.Qa8?
      • 1...c5
        • 2.Qc6#
      • 1...c6
        • 2.Qxc6#
      • 1...Rxa8!
  • Keys
    • 1.Qh1!
      • 1...Rb7
        • 2.Qh8#
      • 1...Ra8
        • 2.Qxa8#
      • 1...c5
        • 2.Qc6#
      • 1...c6
        • 2.Qxc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);S_FLIGHT::QAB1(A)
    • R(c);SBLOCK::QAR(A)
    • R(c);OGATEB::QAR2(A),XR(c)
  • Tries
    • Try
      • Q(A);
      • Vars
        • R(c);OGATEB::QAR2(A),XR(c)
        • P(b);OGATE::QAB1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);P_PINR(c)
      • Vars
        • P(b);OGATEB::QAR2(A)
        • P(b);OGATEB::QAR2(A),XP(b)
      • Refutation
        • R(c);N_SPINR(c),XQ(A)
  • Actual
    • Q(A);
    • Vars
      • R(c);SBLOCK::QAR(A)
      • R(c);OGATEB::QAR2(A),XR(c)
      • P(b);OGATEB::QAR2(A)
      • P(b);OGATEB::QAR2(A),XP(b)
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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).