MESON Chess Problem Database

Problem Display
PID: 271845 (8/b7/6pr/8/4R1N1/6kp/K3Q3/8 w - - 0 1)

Zujevas, Nikolajus

Sachmatija, 2023

8/b7/6pr/8/4R1N1/6kp/K3Q3/8

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qxf2#
    • 1...Bb8
      • 2.Qf2#
  • Tries
    • 1.Sh2?
      • threat
        • 2.Sf1#
        • 2.Rg4#
      • 1...Rh4
        • 2.Sf1#
      • 1...Bf2!
    • 1.Qh2+?
      • 1...Kf3
        • 2.Rf4#
      • 1...Kh4!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sf1#
        • 2.Rg4#
      • 1...Bxe3
        • 2.Rg4#
      • 1...h2
        • 2.Qg2#
      • 1...Rh4
        • 2.Sf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD::QAB1(B),XB(e)
    • B(e);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::S(D)
      • Refutation
        • B(e);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);N_GUARD,P-FLIGHT::R1(C)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • DUALS(2)
    • Vars
      • B(e);XS(D)::R1(C)
      • P(b);N_GUARD::QAR1(B)
      • R(d);::S(D)
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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).