MESON Chess Problem Database

Problem Display
PID: 21571 (nQ1Nb3/2n4r/3N2R1/2kP2Kp/p1B2R2/8/8/6b1 w - - 0 1)

Niemeijer, Meindert

Op de Hoogte, 1919

nQ1Nb3/2n4r/3N2R1/2kP2Kp/p1B2R2/8/8/6b1

#2

8 + 8

3360 Simple Two-move Themes 1924
3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Sa6
      • 2.Se6#
    • 1...Se6+
      • 2.Sxe6#
  • Tries
    • 1.S8b7+?
      • 1...Kb6
        • 2.Sc8#
      • 1...Kb4!
    • 1.Bb3?
      • threat
        • 2.Qb4#
      • 1...Se6+
        • 2.Sxe6#
      • 1...Sxd5
        • 2.Rc4#
      • 1...Bd4
        • 2.Se4#
      • 1...Bb5
        • 2.S6b7#
      • 1...Sb5
        • 2.Se6#
      • 1...Sa6
        • 2.Se6#
      • 1...Sb6
        • 2.S8b7#
      • 1...axb3!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Qb4#
      • 1...Se6+
        • 2.Sxe6#
      • 1...Sxd5
        • 2.Rc4#
      • 1...Bd4
        • 2.Se4#
      • 1...Bb5
        • 2.S6b7#
      • 1...Sb5
        • 2.Se6#
      • 1...Sa6
        • 2.Se6#
      • 1...Sb6
        • 2.S8b7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD::S(H)
    • S(e);CHECK,N_GUARD::S(H),XS(e)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(c);S_FLIGHT::R(F)+S(E),DCHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • QAB1(G)
      • Vars
        • S(e);CHECK,N_GUARD::S(H),XS(e)
        • S(e);SBLOCK,XP(C)::R1(B)
        • B(a);SBLOCK::S(E)
        • B(h);SBLOCK::S(E)
        • S(e);N_GUARD::S(H)
        • S(g);SBLOCK::S(H)
      • Refutation
        • P(b);XB(A)
  • Actual
    • B(A);
    • Threat
      • QAB1(G)
    • Vars
      • S(e);CHECK,N_GUARD::S(H),XS(e)
      • S(e);SBLOCK,XP(C)::R1(B)
      • B(a);SBLOCK::S(E)
      • B(h);SBLOCK::S(E)
      • S(e);N_GUARD::S(H)
      • S(g);SBLOCK::S(H)
HTML5 logo

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).