MESON Chess Problem Database

Problem Display
PID: 245537 (4K3/3N4/2kN2Q1/5R2/1b6/8/8/8 w - - 0 1)

Shumarin, Vladimir Pavlovich

Kudesnik, 2007

4K3/3N4/2kN2Q1/5R2/1b6/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Be1
      • 2.Rc5#
    • 1...Bd2
      • 2.Rc5#
    • 1...Bc3
      • 2.Rc5#
    • 1...Ba5
      • 2.Rc5#
    • 1...Bc5
      • 2.Rxc5#
  • Tries
    • 1.Sb5+?
      • 1...Bd6
        • 2.Qg2#
      • 1...Kb7!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qb6#
      • 1...Kxd6
        • 2.Qb6#
      • 1...Kc7
        • 2.Qb6#
      • 1...Ba5
        • 2.Qc5#
      • 1...Bc5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::R1(A)
    • B(a);N_GUARD::R1(A),XB(a)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • B(a);P_SPINB(a)::QAB(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR1(C)
    • Vars
      • K(b);P-FLIGHT,XS(B)::QAR2(C)
      • K(b);P-FLIGHT::QAB1(C)
      • B(a);N_GUARD::QAR1(C)
      • B(a);N_GUARD::QAR1(C),XB(a)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).