MESON Chess Problem Database

Problem Display
PID: 20986 (8/2Kp1kN1/2B1p3/4P1R1/8/B7/Q7/8 w - - 0 1)

Bettmann, Henry Wald

Der Westen, 1915

8/2Kp1kN1/2B1p3/4P1R1/8/B7/Q7/8

#2

7 + 3

3360 Simple Two-move Themes 1924
785 Het Belgisch Schaakbord (L'Echiquier Belge) 1947
5064 100 Years of the American Two-move Chess Problem 1962

SOLUTION

  • SOUND
  • Sets
    • 1...dxc6
      • 2.Qxe6#
  • Tries
    • 1.Bd6?
      • 1...dxc6
        • 2.Qxe6#
      • 1...Kg8!
  • Keys
    • 1.Sxe6!
      • 1...Ke8
        • 2.Sg7#
      • 1...dxc6
        • 2.Sg7#
      • 1...dxe6
        • 2.Qf2#
      • 1...d5
        • 2.Sd8#
      • 1...d6
        • 2.Rg7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD,XB(E)::QAB1(A),XP(a)
  • Tries
    • Try
      • B(B);
      • Vars
        • P(b);N_GUARD,XB(E)::QAB1(A),XP(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(G);XP(a)
    • Vars
      • K(c);P_SPINP(b),S_FLIGHT::S(G)
      • P(b);N_GUARD,XB(E)::QAB(A)+S(G)
      • P(b);P_SPINP(b),SBLOCK,XS(G)::QAR(A)
      • P(b);::S(G)
      • P(b);::R1(D)
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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).