MESON Chess Problem Database

Problem Display
PID: 21367 (8/8/2B5/1pN5/5p2/4B3/QK1bk3/2RN3R w - - 0 1)

Koetsheid, Petrus Albertus

Seilberger, Johann Joseph Petrus Adrianus

1st Prize, Good Companions (November Meredith Ty.), 1918

8/8/2B5/1pN5/5p2/4B3/QK1bk3/2RN3R

#2

8 + 4

3132 The Good Companion Two-Mover 1922
3360 Simple Two-move Themes 1924
3147 Chess Problems: Introduction to an Art 1963
3098 FIDE Album (1914-1944) (I) 1971
3310 2345 Chess Problems 1997
3713 Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc1+
      • 2.Kxc1#
    • 1...Bc3+
      • 2.Kxc3#
    • 1...f3
      • 2.Bxb5#
    • 1...b4
      • 2.Qc4#
      • 2.Qa6#
  • Keys
    • 1.Qe6!
      • 1...Bxc1+
        • 2.Bxc1#
      • 1...Bc3+
        • 2.Sxc3#
      • 1...Bxe3
        • 2.Rc2#
      • 1...fxe3
        • 2.Qg4#
      • 1...Be1
        • 2.Bxf4#
      • 1...Bb4
        • 2.Bxf4#
      • 1...Ba5
        • 2.Bxf4#
      • 1...f3
        • 2.Bxb5#
      • 1...b4
        • 2.Qc4#

This anticipates 225422(1991)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,XR(A)::QAR(D)+K(E),XB(a)
    • B(a);CHECK::QAR(D)+K(E),XB(a)
    • P(c);SBLOCK::B(H),XP(d)
  • Actual
    • Q(D);
    • Vars
      • B(a);CHECK,OGATE,XR(A)::QAR(D)+B(F),XB(a)
      • B(a);CHECK,N_GUARD::S(B),XB(a)
      • B(a);OGATEB,P_SPINB(a),XB(F)::R(A)
      • P(c);N_GUARD,P_SPINP(c),XB(F)::QAB(D)
      • B(a);N_GUARD::QAR(D)+B(F),XP(c)
      • P(c);SBLOCK::B(H),XP(d)
      • P(d);N_GUARD::QAB(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).