MESON Chess Problem Database

Problem Display
PID: 66595 (1Qb5/4knNP/1K6/2PR4/8/2B5/8/8 w - - 0 1)

Stal, Karl Alfred

British Chess Magazine, 1889

1Qb5/4knNP/1K6/2PR4/8/2B5/8/8

#2

7 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.Qe8#
    • 1...Bg4
      • 2.Qe8#
    • 1...Bf5
      • 2.Qe8#
    • 1...Ba6
      • 2.Qe8#
    • 1...Be6
      • 2.Qe8#
    • 1...Bb7
      • 2.Qe8#
  • Keys
    • 1.Rf5!
      • 1...Kd7
        • 2.Qc7#
      • 1...Kd8
        • 2.Qc7#
      • 1...Kf8
        • 2.Qd6#
      • 1...Bxf5
        • 2.Qe8#
      • 1...Ba6
        • 2.Qe8#
      • 1...Be6
        • 2.Qe8#
      • 1...Bb7
        • 2.Qe8#
      • 1...Bd7
        • 2.Bf6#
      • 1...Se5
        • 2.Qd6#
      • 1...Sg5
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qd6#
      • 1...Sd8
        • 2.Qd6#
      • 1...Sh8
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • B(c);OGATE::QAR1(G)
  • Actual
    • R(C);
    • Vars
      • K(a);P-FLIGHT::QAR1(G)
      • K(a);P_SPINB(c),S_FLIGHT::QAB1(G)
      • K(a);P_SPINB(c),P_SPINS(b),S_FLIGHT::QAB(G)
      • B(c);OGATE,XR(C)::QAR1(G)
      • B(c);OGATE::QAR1(G)
      • B(c);SBLOCK::B(A)
      • S(b);N_GUARD::QAB1(G)
      • S(b);N_GUARD::QAB1(G),XS(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).