MESON Chess Problem Database

Problem Display
PID: 244111 (8/8/8/4Q3/8/2Nk1p2/8/1R1Kb3 w - - 0 1)

Belik, Nikolai Ivanovich

Problemist Pribuzhya, 1990

8/8/8/4Q3/8/2Nk1p2/8/1R1Kb3

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sa4?
      • threat
        • 2.Sb2#
      • 1...Kc4
        • 2.Qe4#
      • 1...Bc3!
    • 1.Rc1?
      • threat
        • 2.Qe4#
      • 1...Bxc3
        • 2.Rxc3#
      • 1...Kc4!
    • 1.Rb4?
      • threat
        • 2.Qd4#
      • 1...Bxc3
        • 2.Qe4#
      • 1...Bf2!
    • 1.Qd5+?
      • 1...Kxc3
        • 2.Rb3#
      • 1...Ke3!
  • Keys
    • 1.Rb3!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Qd5#
      • 1...Bxc3
        • 2.Rxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Vars
        • K(b);S_FLIGHT::QAR2(D)
      • Refutation
        • B(a);
    • Try
      • R(A);
      • Threat
        • QAB1(D)
      • Vars
        • B(a);OGATE,XS(C)::R1(A),XB(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);
      • Threat
        • QAR1(D)
      • Vars
        • B(a);SBLOCK,XS(C)::QAB1(D)
      • Refutation
        • B(a);
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::R1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAB1(D)
    • Vars
      • K(b);S_FLIGHT::QAB1(D)
      • B(a);OGATE,P_SPINB(a),XS(C)::R1(A),XB(a)
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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).