MESON Chess Problem Database

Problem Display
PID: 232291 (4r3/r1nR2N1/3B1kP1/Q2b4/2p2P2/p1b5/K1Bpq3/1R6 w - - 0 1)

Bunka, Vladislav

Freie Presse, 1992

4r3/r1nR2N1/3B1kP1/Q2b4/2p2P2/p1b5/K1Bpq3/1R6

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sh5#
    • 1...Re6
      • 2.Rf7#
    • 1...Bh1
      • 2.Rf7#
      • 2.Qf5#
      • 2.Qg5#
    • 1...Bg2
      • 2.Rf7#
      • 2.Qf5#
      • 2.Qg5#
    • 1...Bf3
      • 2.Rf7#
      • 2.Qf5#
      • 2.Qg5#
    • 1...Be4
      • 2.Qg5#
    • 1...Bc6
      • 2.Rf7#
      • 2.Qf5#
      • 2.Qg5#
    • 1...Be6
      • 2.Qg5#
    • 1...Bb7
      • 2.Rf7#
      • 2.Qf5#
      • 2.Qg5#
    • 1...Bf7
      • 2.Rxf7#
    • 1...Ba8
      • 2.Rf7#
      • 2.Qf5#
      • 2.Qg5#
    • 1...Bg8
      • 2.Qf5#
      • 2.Qg5#
    • 1...Se6
      • 2.Sxe8#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Be5#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Qe6
        • 2.Sh5#
      • 1...Re5
        • 2.Bxe5#
      • 1...Re6
        • 2.Rf7#
      • 1...Be5
        • 2.Bxe5#
      • 1...Bc6
        • 2.Rf7#
      • 1...Se6
        • 2.Sxe8#
      • 1...Be6!
  • Keys
    • 1.Rb6!
      • threat
        • 2.Be5#
      • 1...Qe5
        • 2.Bxe5#
      • 1...Qe6
        • 2.Sh5#
      • 1...Re5
        • 2.Bxe5#
      • 1...Re6
        • 2.Rf7#
      • 1...Be5
        • 2.Bxe5#
      • 1...Bc6
        • 2.Rf7#
        • 2.Qf5#
        • 2.Qg5#
      • 1...Be6
        • 2.Qg5#
      • 1...Se6
        • 2.Sxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_GUARD,SBLOCK::S(I)
    • R(j);S_CUTB(f)::R1(H)
    • B(f);OGATE::QAB1(E)
    • B(f);N_GUARD::R1(H),XB(f)
    • S(i);N_GUARD,SBLOCK,S_CUTQ(b)::S(I),XR(j)
  • Tries
    • Try
      • Q(E);
      • Threat
        • QAR(E)+B(F),DCHECK
      • Vars
        • Q(b);::QAR(E)+B(F),DCHECK,XQ(b)
        • Q(b);N_GUARD,SBLOCK::S(I)
        • R(j);::QAR(E)+B(F),DCHECK,XR(j)
        • R(j);S_CUTB(f)::R1(H)
        • B(d);::QAR(E)+B(F),DCHECK,XB(d)
        • B(f);N_GUARD::R1(H)
        • S(i);N_GUARD,SBLOCK,S_CUTQ(b)::S(I),XR(j)
      • Refutation
        • B(f);
  • Actual
    • R(A);
    • Threat
      • R(A)+B(F),DCHECK
    • Vars
      • Q(b);::R(A)+B(F),DCHECK,XQ(b)
      • Q(b);N_GUARD,SBLOCK::S(I)
      • R(j);::R(A)+B(F),DCHECK,XR(j)
      • R(j);S_CUTB(f)::R1(H)
      • B(d);::R(A)+B(F),DCHECK,XB(d)
      • B(f);OGATE::QAB1(E)
      • S(i);N_GUARD,SBLOCK,S_CUTQ(b)::S(I),XR(j)
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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).