MESON Chess Problem Database

Problem Display
PID: 10705 (1RQR4/8/8/2P2K2/8/8/r1k5/8 w - - 0 1)

Lukyanov, Valentin Volodimirovich

6th Prize, Molodoi Leninets, 1967

1RQR4/8/8/2P2K2/8/8/r1k5/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qd2#
      • 1...Kc1
        • 2.Qd1#
      • 1...Kc3
        • 2.Qd3#
      • 1...Rb2!
  • Keys
    • 1.Qb7!
      • 1...Kc1
        • 2.Qb1#
      • 1...Kc3
        • 2.Qb3#
      • 1...Rb2
        • 2.Qxb2#
      • 1...Ra1
        • 2.Qb2#
      • 1...Ra3
        • 2.Qb2#
      • 1...Ra4
        • 2.Qb2#
      • 1...Ra5
        • 2.Qb2#
      • 1...Ra6
        • 2.Qb2#
      • 1...Ra7
        • 2.Qb2#
      • 1...Ra8
        • 2.Qb2#

This anticipates 38294(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAR1(D)
      • Vars
        • K(b);P-FLIGHT::QAR1(D)
      • Refutation
        • R(a);
  • Actual
    • Q(D);
    • Vars
      • K(b);P-FLIGHT::QAR1(D)
      • R(a);N_GUARD::QAR1(D),XR(a)
      • R(a);N_GUARD::QAR1(D)
      • R(a);N_GUARD,P_PINP(A)::QAR1(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).