MESON Chess Problem Database

Problem Display
PID: 172307 (1R1b4/4k1P1/7K/5Q2/8/8/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

1R1b4/4k1P1/7K/5Q2/8/8/8/8

#2

4 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Qe6#
  • Tries
    • 1.g8Q?
      • threat
        • 2.Qfe6#
        • 2.Qge6#
        • 2.Qxd8#
        • 2.Qgf8#
      • 1...Ba5
        • 2.Qfe6#
        • 2.Qge6#
        • 2.Qgf8#
      • 1...Bb6
        • 2.Qfe6#
        • 2.Qge6#
        • 2.Qgf8#
      • 1...Bc7
        • 2.Qfe6#
        • 2.Qge6#
        • 2.Qgf8#
      • 1...Kd6!
    • 1.g8B?
      • 1...Ke8
        • 2.Qf7#
      • 1...Ba5
        • 2.Qe6#
      • 1...Bb6
        • 2.Qe6#
      • 1...Bc7
        • 2.Qe6#
      • 1...Kd6!
  • Keys
    • 1.Qd5!
      • 1...Kf6
        • 2.g8S#
      • 1...Ke8
        • 2.Qe6#
      • 1...Ba5
        • 2.g8S#
      • 1...Bb6
        • 2.g8S#
      • 1...Bc7
        • 2.g8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINB(b)::QAR2(A)
  • Tries
    • Try
      • P(C);
      • Threat
        • DUALS(4)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • K(a);P-FLIGHT,P_SPINB(b)::QAB1(A)
        • B(b);::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::P=S
      • K(a);P-FLIGHT,P_SPINB(b)::QAR2(A)
      • B(b);::P=S
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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).