MESON Chess Problem Database

Problem Display
PID: 180235 (4n3/8/4B2q/3RpQ2/K1k4r/p6r/1P3P2/2n1bNBb w - - 0 1)

Lider, Valentin Viktorovich

Freie Presse, 1979

4n3/8/4B2q/3RpQ2/K1k4r/p6r/1P3P2/2n1bNBb

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rc5+?
      • 1...Kd4
        • 2.Rc4#
      • 1...Kxc5+!
    • 1.f3?
      • threat
        • 2.Rc5#
      • 1...Qe3
        • 2.Sxe3#
      • 1...Re4
        • 2.Qxe4#
      • 1...Bf2
        • 2.Qc2#
      • 1...e4
        • 2.Rd4#
      • 1...Rd4!
  • Keys
    • 1.f4!
      • threat
        • 2.Rc5#
      • 1...Bxd5
        • 2.Qe4#
      • 1...Re3
        • 2.Sxe3#
      • 1...Bf2
        • 2.Sd2#
      • 1...Be4
        • 2.Qxe4#
      • 1...e4
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(f);P-FLIGHT::R1(F)
      • Refutation
        • K(f);CHECK,P-FLIGHT,P_SPINP(h),XR(F)
    • Try
      • P(D);
      • Threat
        • B(H)+R(F),DCHECK
      • Vars
        • Q(i);N_GUARD::S(A),XQ(i)
        • R(g);N_GUARD::QAR2(G),XR(g)
        • B(b);N_GUARD::QAR2(G)
        • P(h);::B(H)+R(F),DCHECK
      • Refutation
        • R(g);
  • Actual
    • P(D);
    • Threat
      • B(H)+R(F),DCHECK
    • Vars
      • B(c);N_GUARD,P_SPINB(c),XR(F)::QAR2(G)
      • R(e);N_GUARD::S(A),XR(e)
      • B(b);N_GUARD::S(A)
      • B(c);N_GUARD::QAR2(G),XB(c)
      • P(h);::B(H)+R(F),DCHECK
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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).