MESON Chess Problem Database

Problem Display
PID: 180426 (1q6/1P1kP1N1/RB1p1K2/3P4/8/8/8/8 w - - 0 1)

Lider, Valentin Viktorovich

1/2 HM., Bulletin of the Central Chess Club of USSR, 1972

1q6/1P1kP1N1/RB1p1K2/3P4/8/8/8/8

#2

7 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa7
      • 2.e8Q#
      • 2.e8B#
    • 1...Qc7
      • 2.e8Q#
    • 1...Qxb7
      • 2.e8Q#
    • 1...Qd8
      • 2.exd8Q#
      • 2.exd8R#
    • 1...Qf8+
      • 2.exf8S#
  • Keys
    • 1.Ra7!
      • 1...Qf8+
        • 2.exf8S#
      • 1...Qxa7
        • 2.e8Q#
        • 2.e8B#
      • 1...Qxb7
        • 2.e8Q#
      • 1...Qa8
        • 2.bxa8Q#
        • 2.bxa8R#
      • 1...Qc7
        • 2.e8Q#
      • 1...Qc8
        • 2.b8S#
      • 1...Qd8
        • 2.exd8Q#
        • 2.exd8R#
      • 1...Qe8
        • 2.b8Q#
        • 2.b8R#
      • 1...Qg8
        • 2.b8Q#
        • 2.b8R#
      • 1...Qh8
        • 2.b8Q#
        • 2.b8R#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD::P=Q
    • Q(c);N_GUARD,XP(E)::P=Q
    • Q(c);OGATE,P_PINP(F)::PXQ(c)=Q
    • Q(c);CHECK,OGATE::PXQ(c)=S
  • Actual
    • R(B);
    • Vars
      • Q(c);CHECK,OGATE::PXQ(c)=S
      • Q(c);N_GUARD,XR(B)::P=Q
      • Q(c);N_GUARD,P_SPINQ(c),XP(E)::P=Q
      • Q(c);OGATE::PXQ(c)=Q
      • Q(c);N_GUARD::P=Q
      • Q(c);OGATE,SBLOCK::P=S
      • Q(c);OGATE,P_PINP(F)::PXQ(c)=Q
      • Q(c);OGATE::P=Q
      • Q(c);OGATE,P_PINS(G)::P=Q
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).