MESON Chess Problem Database

Problem Display
PID: 271143 (1r1b1B2/4Pp2/2q2k2/rQ1bR2K/4pP2/7B/p7/8 w - - 0 1)

Shajgarovski, Svetlin Ivanov

Pat a Mat, 1992

1r1b1B2/4Pp2/2q2k2/rQ1bR2K/4pP2/7B/p7/8

#2

7 + 9

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.e8S#
    • 1...Qa8
      • 2.e8S#
    • 1...Qc1
      • 2.e8S#
    • 1...Qc2
      • 2.e8S#
    • 1...Qc3
      • 2.e8S#
    • 1...Qc4
      • 2.e8S#
    • 1...Qc5
      • 2.e8S#
    • 1...Qa6
      • 2.e8S#
    • 1...Qb6
      • 2.e8S#
    • 1...Qd6
      • 2.e8S#
    • 1...Qc7
      • 2.e8S#
    • 1...Qc8
      • 2.e8S#
    • 1...Rxb5
      • 2.exd8Q#
      • 2.exd8B#
    • 1...Rb6
      • 2.exd8Q#
      • 2.exd8B#
  • Tries
    • 1.Qxc6+?
      • 1...Be6
        • 2.e8S#
      • 1...Bxc6!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Re6#
      • 1...Rxb2
        • 2.exd8Q#
        • 2.exd8B#
      • 1...Qe6
        • 2.Rf5#
        • 2.Rxe6#
      • 1...Qc3
        • 2.e8S#
      • 1...Bb3
        • 2.Rc5#
      • 1...Bc4
        • 2.Rb5#
      • 1...Be6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(e);N_GUARD::P=S
    • R(h);N_GUARD,XQ(C)::PXB(i)=Q
    • R(h);N_GUARD::PXB(i)=Q
  • Tries
    • Try
      • Q(C);CHECK,XQ(e)
      • Vars
        • B(d);N_GUARD,P_PINR(D),P_SPINB(d)::P=S
      • Refutation
        • B(d);P_PINR(D),XQ(C)
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+R(D),DCHECK
    • Vars
      • R(h);N_GUARD,XQ(C)::PXB(i)=Q
      • Q(e);N_GUARD::P=S
      • B(d);OGATE,P_PINR(D)::QAB(C)+R(D)
      • B(d);P_PINR(D),SBLOCK::QAB(C)+R(D),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).