MESON Chess Problem Database

Problem Display
PID: 2422 (4N2B/3p4/BKp1p3/1p1k1p2/2p1p3/3pPP2/8/2R4Q w - - 0 1)

Keeble, John Frederick

Source?, 0000

4N2B/3p4/BKp1p3/1p1k1p2/2p1p3/3pPP2/8/2R4Q

#2

8 + 9

499 Chess Problems (Rayner) 1890

SOLUTION

  • SOUND
  • Sets
    • 1...exf3
      • 2.Qxf3#
    • 1...b4
      • 2.Bxc4#
    • 1...f4
      • 2.fxe4#
    • 1...c5
      • 2.Bb7#
    • 1...d6
      • 2.Sc7#
  • Tries
    • 1.Qh2?
      • threat
        • 2.Sf6#
        • 2.Sc7#
        • 2.Qe5#
        • 2.Qd6#
      • 1...exf3
        • 2.Sf6#
        • 2.Qe5#
      • 1...c3
        • 2.Qa2#
      • 1...e5
        • 2.Qxe5#
      • 1...d6
        • 2.Sf6#
        • 2.Sc7#
        • 2.Qxd6#
      • 1...f4!
  • Keys
    • 1.Qg2!
      • 1...exf3
        • 2.Qxf3#
      • 1...c3
        • 2.Qa2#
      • 1...e5
        • 2.Qg8#
      • 1...d2
        • 2.Qxd2#
      • 1...b4
        • 2.Bxc4#
      • 1...f4
        • 2.fxe4#
      • 1...c5
        • 2.Bb7#
      • 1...d6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE,P_SPINP(c),XP(D)::QAB(B),XP(c)
    • P(d);OGATE::B(E),XP(b)
    • P(f);N_GUARD::P(D),XP(c)
    • P(g);OGATEB::B(E)
    • P(i);SBLOCK::S(G)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(4)
      • Vars
        • P(b);OGATEB::QAB(B)
        • P(h);::QAR1(B),XP(h)
      • Refutation
        • P(f);
  • Actual
    • Q(B);
    • Vars
      • P(c);OGATE,P_SPINP(c),XP(D)::QAB(B),XP(c)
      • P(b);OGATEB::QAB(B)
      • P(h);OGATEB::QAB(B)
      • P(a);OGATEB::QAR(B),XP(a)
      • P(d);OGATE::B(E),XP(b)
      • P(f);N_GUARD::P(D),XP(c)
      • P(g);OGATEB::B(E)
      • P(i);SBLOCK::S(G)
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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).