MESON Chess Problem Database

Problem Display
PID: 68338 (3B4/8/b1N3p1/r4kN1/1p6/3nP3/4B3/1Q3K2 w - - 0 1)

Eerkes, Allard Pieter

Chess, 1949

3B4/8/b1N3p1/r4kN1/1p6/3nP3/4B3/1Q3K2

#2

7 + 6

742 Problem (Zagreb) 1951

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Qxd3#
    • 1...Re5
      • 2.Sd4#
    • 1...Bb7
      • 2.Qxd3#
    • 1...Bc8
      • 2.Qxd3#
  • Keys
    • 1.Qd1!
      • threat
        • 2.Bg4#
      • 1...Sc1
        • 2.Qd7#
      • 1...Se1
        • 2.Qd7#
      • 1...Sb2
        • 2.Qd7#
      • 1...Sf2
        • 2.Qd7#
      • 1...Sf4
        • 2.e4#
      • 1...Sc5
        • 2.Qd5#
      • 1...Se5
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(c);S_CUTB(e)::QAB(A),XS(a)
    • R(c);SBLOCK::S(F)
    • B(e);N_GUARD::QAB(A),XS(a)
  • Actual
    • Q(A);N_PINS(a)
    • Threat
      • B(C)
    • Vars
      • S(a);OGATE,P_PINB(C)::QAB(A)
      • S(a);P_PINB(C),SBLOCK::P(D)
      • S(a);OGATE,P_PINB(C)::QAR2(A)
      • S(a);P_PINB(C),SBLOCK::S(F)
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).