MESON Chess Problem Database

Problem Display
PID: 172302 (5qk1/5bB1/5R1K/8/8/8/8/6Q1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Vecherni Krasnodar, 1996

5qk1/5bB1/5R1K/8/8/8/8/6Q1

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg7+
      • 2.Qxg7#
    • 1...Ba2
      • 2.Rxf8#
    • 1...Bb3
      • 2.Rxf8#
    • 1...Bc4
      • 2.Rxf8#
    • 1...Bd5
      • 2.Rxf8#
    • 1...Bh5
      • 2.Rxf8#
    • 1...Be6
      • 2.Rxf8#
    • 1...Bg6
      • 2.Rxf8#
    • 1...Be8
      • 2.Rxf8#
  • Tries
    • 1.Qb1?
      • threat
        • 2.Qh7#
      • 1...Bg6
        • 2.Rxf8#
      • 1...Qxg7+!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Qh7#
      • 1...Qxg7+
        • 2.Qxg7#
      • 1...Bxg6
        • 2.Rxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XB(D)::QAR1(A),XQ(b)
    • B(a);::R1(B),XQ(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • B(a);::R1(B),XQ(b)
      • Refutation
        • Q(b);CHECK,XB(D)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XB(D)::QAR1(A),XQ(b)
      • B(a);XQ(A)::R1(B),XQ(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).