MESON Chess Problem Database

Problem Display
PID: 265799 (8/8/8/5R2/6q1/1Q3RPk/6N1/7K w - - 0 1)

Akimov, Nikolai Nikolaevich

Sachmatija, 2022

8/8/8/5R2/6q1/1Q3RPk/6N1/7K

#2

6 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3
      • 2.Rxg3#
  • Tries
    • 1.Rh5+?
      • 1...Qh4
        • 2.Rxh4#
        • 2.Qe6#
      • 1...Qxh5!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Rh5#
      • 1...Qxf3
        • 2.Rxf3#
      • 1...Qxf5
        • 2.Qxf5#
      • 1...Qh5
        • 2.Rxh5#
      • 1...Qg5
        • 2.Rxg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE,P_SPINQ(b),XP(E)::R1(D),XQ(b)
  • Tries
    • Try
      • R(F);CHECK
      • Refutation
        • Q(b);XR(F)
  • Actual
    • Q(C);
    • Threat
      • R(F)
    • Vars
      • Q(b);OGATE,P_PINS(B),XR(D)::QAB(C)+R(F),XQ(b)
      • Q(b);OGATE,P_SPINQ(b),XR(F)::QAB(C),XQ(b)
      • Q(b);::QAB(C)+R(F),DCHECK,XQ(b)
      • Q(b);OGATEB::QAB(C)+R(F),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).