MESON Chess Problem Database

Problem Display
PID: 173613 (1B2Brn1/n2NP1P1/K3k1Nq/5p2/QbP5/8/8/8 w - - 0 1)

Boros, Sandor

Arbeidermagasinet, 1937

1B2Brn1/n2NP1P1/K3k1Nq/5p2/QbP5/8/8/8

#2

9 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.gxf8S#
    • 1...Qd2
      • 2.gxf8S#
    • 1...Qe3
      • 2.gxf8S#
    • 1...Qf4
      • 2.gxf8S#
    • 1...Qg5
      • 2.gxf8S#
    • 1...Qh1
      • 2.gxf8S#
    • 1...Qh2
      • 2.gxf8S#
    • 1...Qh3
      • 2.gxf8S#
    • 1...Qh4
      • 2.gxf8S#
    • 1...Qh5
      • 2.gxf8S#
    • 1...Qh7
      • 2.gxf8S#
    • 1...Qh8
      • 2.gxf8S#
    • 1...Be1
      • 2.exf8S#
    • 1...Bd2
      • 2.exf8S#
    • 1...Bc3
      • 2.exf8S#
    • 1...Ba5
      • 2.exf8S#
    • 1...Sf6
      • 2.Sdxf8#
    • 1...Sxe7
      • 2.Sgxf8#
  • Tries
    • 1.Qc6+?
      • 1...Bd6
        • 2.Qd5#
        • 2.Qxd6#
        • 2.exf8S#
      • 1...Sxc6!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd5#
      • 1...Qxg6
        • 2.Qe2#
      • 1...Sxe7
        • 2.Sgxf8#
      • 1...Qd2
        • 2.gxf8S#
      • 1...Qh1
        • 2.gxf8S#
      • 1...Bd2
        • 2.exf8S#
      • 1...Sf6
        • 2.Sdxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 13
  • Sets
    • Q(d);N_GUARD::PXR(f)=S
    • B(a);N_GUARD::PXR(f)=S
    • S(g);SBLOCK::S(E),XR(f)
    • S(g);SBLOCK,XP(F)::S(D),XR(f)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • S(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • Q(d);N_GUARD,XS(D)::QAR(A)
      • S(g);SBLOCK,XP(F)::S(D),XR(f)
      • Q(d);N_GUARD::PXR(f)=S
      • B(a);N_GUARD::PXR(f)=S
      • S(g);SBLOCK::S(E),XR(f)
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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).