MESON Chess Problem Database

Problem Display
PID: 23359 (r3k3/1R6/8/8/8/1p2K1p1/8/6Q1 w q - 0 1)

Pustovoi, Boris

Omskaya Pravda, 1971

r3k3/1R6/8/8/8/1p2K1p1/8/6Q1

#2

3 + 4

3296 Shakhmatny zadachi miniaturi 1987

SOLUTION

  • SOUND
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qh8#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qh8#
        • 2.Qxa8#
      • 1...Kf8
        • 2.Qh8#
        • 2.Qxa8#
      • 1...0-0-0
        • 2.Qa8#
      • 1...Ra2
        • 2.Qh8#
      • 1...Ra3
        • 2.Qh8#
      • 1...Ra4
        • 2.Qh8#
      • 1...Ra5
        • 2.Qh8#
      • 1...Ra6
        • 2.Qh8#
      • 1...Ra7
        • 2.Qh8#
      • 1...Rb8
        • 2.Qh8#
      • 1...Rc8
        • 2.Qh8#
      • 1...Rd8
        • 2.Qh8#
      • 1...b2
        • 2.Qxa8#
      • 1...Rxa1!
    • 1.Qxg3?
      • threat
        • 2.Qg8#
      • 1...Kd8
        • 2.Qg8#
      • 1...0-0-0
        • 2.Qc7#
        • 2.Qb8#
      • 1...Kf8!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Qh8#
      • 1...Kd8
        • 2.Qh8#
      • 1...Kf8
        • 2.Qh8#
      • 1...0-0-0
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(d);0-0-0::QAR2(A)
        • R(c);::QAR(A)
        • R(c);SBLOCK::QAR(A)
        • P(a);::QAR(A),XR(c)
      • Refutation
        • R(c);XQ(A)
    • Try
      • Q(A);XP(b)
      • Threat
        • QAR2(A)
      • Vars
        • K(d);P-FLIGHT::QAR(A)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • K(d);P-FLIGHT::QAR(A)
      • K(d);P-FLIGHT::QAR2(A)
      • K(d);0-0-0::QAR2(A)
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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).