MESON Chess Problem Database

Problem Display
PID: 144404 (r3kBK1/p5Qp/N5n1/8/8/8/8/8 w q - 0 1)

Hannelius, Jan Ingvar

Suomen Tehtavaniekat, 1991

r3kBK1/p5Qp/N5n1/8/8/8/8/8

#2

4 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rd8
      • 2.Sc7#
      • 2.Qf7#
    • 1...Sf4
      • 2.Qe7#
    • 1...Sh4
      • 2.Qe7#
    • 1...Se5
      • 2.Qe7#
    • 1...Se7+
      • 2.Qxe7#
    • 1...Sh8
      • 2.Qe7#
    • 1...0-0-0
      • 2.Qc7#
  • Tries
    • 1.Sb8?
      • threat
        • 2.Qd7#
      • 1...Se7+
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qd7#
      • 1...Sxf8
        • 2.Qxf8#
      • 1...Se5
        • 2.Qe7#
      • 1...Rxb8!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qd7#
      • 1...Se7+
        • 2.Qxe7#
      • 1...Kd8
        • 2.Qd7#
      • 1...0-0-0
        • 2.Qb7#
      • 1...Sxf8
        • 2.Qxf8#
      • 1...Rd8
        • 2.Qf7#
      • 1...Se5
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::QAR1(B)
    • S(a);CHECK,N_GUARD::QAR1(B),XS(a)
    • K(e);0-0-0,OGATEB,P_PINB(C)::QAR1(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(B),XS(a)
        • K(e);P-FLIGHT::QAR1(B)
        • S(a);OGATE,XB(C)::QAR1(B),XS(a)
        • S(a);N_GUARD::QAR1(B)
      • Refutation
        • R(d);XS(A)
  • Actual
    • S(A);
    • Threat
      • QAB1(B)
    • Vars
      • S(a);CHECK,N_GUARD::QAR1(B),XS(a)
      • K(e);P-FLIGHT::QAR1(B)
      • K(e);0-0-0,OGATEB,P_PINB(C)::QAB1(B)
      • S(a);OGATE,XB(C)::QAR1(B),XS(a)
      • R(d);SBLOCK::QAB1(B)
      • S(a);N_GUARD::QAR1(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).