MESON Chess Problem Database

Problem Display
PID: 274254 (RN1k1K2/1P6/3B3p/3n4/8/7b/2n5/2bQ4 w - - 0 1)

Marysko, Milos

Mat, 1973

RN1k1K2/1P6/3B3p/3n4/8/7b/2n5/2bQ4

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Sc6#
    • 1...Sc7
      • 2.Be7#
  • Tries
    • 1.Sa6+?
      • 1...Bc8
        • 2.bxc8Q#
      • 1...Kd7!
    • 1.Qg4?
      • threat
        • 2.Sa6#
        • 2.Sc6#
        • 2.Sd7#
      • 1...Sb6
        • 2.Sc6#
      • 1...Sc7
        • 2.Sc6#
        • 2.Be7#
      • 1...Se7
        • 2.Sc6#
      • 1...Bxg4!
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qe8#
      • 1...Bd7
        • 2.Sc6#
      • 1...Sf6
        • 2.Qa5#
      • 1...Sc7
        • 2.Be7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(c);SBLOCK::R(D)+S(E),DCHECK
    • S(d);SBLOCK::QAR(A)+B(B),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • B(c);OGATE,P_SPINB(c)::PXB(c)=Q
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);::R(D)+S(E),DCHECK
      • Refutation
        • B(c);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • B(c);SBLOCK::R(D)+S(E),DCHECK
      • S(d);OGATE::QAB(A)
      • S(d);N_GUARD,SBLOCK::B(B)
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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).