MESON Chess Problem Database

Problem Display
PID: 214749 (2K5/B1pp4/2kq1R2/1p3p1B/4p3/1Q6/8/8 w - - 0 1)

King, JF

Detroit Free Press, 1877

2K5/B1pp4/2kq1R2/1p3p1B/4p3/1Q6/8/8

#2

5 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Bf3#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Bf7?
      • threat
        • 2.Bd5#
        • 2.Qc2#
        • 2.Qd5#
        • 2.Qc3#
      • 1...Qxf6
        • 2.Qd5#
      • 1...b4
        • 2.Qa4#
        • 2.Qc4#
        • 2.Qd5#
      • 1...Qe6!
    • 1.Be8?
      • threat
        • 2.Bxd7#
      • 1...Qe6
        • 2.Rxe6#
        • 2.Qxe6#
      • 1...Qxf6!
    • 1.Qf7?
      • 1...Qxf6
        • 2.Qxd7#
      • 1...Qe6
        • 2.Qxd7#
      • 1...b4
        • 2.Qc4#
      • 1...e3
        • 2.Bf3#
      • 1...f4!
  • Keys
    • 1.Qd3!
      • 1...Qxf6
        • 2.Qxd7#
      • 1...exd3
        • 2.Bf3#
      • 1...f4
        • 2.Qxe4#
      • 1...Qe6
        • 2.Qxd7#
      • 1...e3
        • 2.Bf3#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATEB::B(B)
    • P(b);N_GUARD::QAR2(A)
  • Tries
    • Try
      • B(B);
      • Threat
        • DUALS(4)
      • Vars
        • Q(e);N_SPINQ(e),XR(C)::QAB1(A)
      • Refutation
        • Q(e);
    • Try
      • B(B);P_PINP(g)
      • Threat
        • B(B),XP(g)
      • Refutation
        • Q(e);N_SPINQ(e),XR(C)
    • Try
      • Q(A);
      • Vars
        • Q(e);N_SPINQ(e),XR(C)::QAB1(A),XP(g)
        • Q(e);::QAB1(A),XP(g)
        • P(b);N_GUARD::QAR2(A)
        • P(a);OGATEB::B(B)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Vars
      • Q(e);N_SPINQ(e),OGATE,XR(C)::QAB1(A),XP(g)
      • P(a);OGATEB,XQ(A)::B(B)
      • P(c);N_GUARD::QAB(A),XP(a)
      • Q(e);OGATE::QAB1(A),XP(g)
      • P(a);OGATEB::B(B)
      • P(b);N_GUARD::QAR2(A)
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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).