MESON Chess Problem Database

Problem Display
PID: 199303 (3R4/3b1p2/4p3/4kP2/1P5P/2N5/1B4QK/8 w - - 0 1)

Albregts, W

Haagsche Courant, 1896

3R4/3b1p2/4p3/4kP2/1P5P/2N5/1B4QK/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qe4#
    • 1...Kf4
      • 2.Qe4#
    • 1...Kxf5
      • 2.Qg5#
  • Tries
    • 1.Qe4+?
      • 1...Kf6
        • 2.Sd5#
      • 1...Kd6!
  • Keys
    • 1.f6!
      • 1...Kd4
        • 2.Qe4#
      • 1...Kf4
        • 2.Qe4#
      • 1...Kf5
        • 2.Qg5#
      • 1...Kd6
        • 2.Sb5#
      • 1...Kxf6
        • 2.Qg5#
      • 1...Ba4
        • 2.Qg5#
      • 1...Bb5
        • 2.Qg5#
      • 1...Bc6
        • 2.Qg5#
      • 1...Bc8
        • 2.Qg5#
      • 1...Be8
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINB(c),S_FLIGHT::QAR1(B)
    • K(a);S_FLIGHT::QAR1(B)
    • K(a);OGATEB,P-FLIGHT,XP(G)::QAR1(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::B(A)+S(D),DCHECK
      • Refutation
        • K(a);P_SPINB(c),S_FLIGHT
  • Actual
    • P(G);
    • Vars
      • K(a);P_SPINB(c),S_FLIGHT::QAR1(B)
      • K(a);S_FLIGHT::QAR1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • K(a);P_SPINB(c),S_FLIGHT::S(D)
      • K(a);S_FLIGHT,XP(G)::QAB1(B)
      • B(c);::QAR2(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).