MESON Chess Problem Database

Problem Display
PID: 16841 (b1rRrbq1/2n1n3/3B1Np1/4N3/3k4/5P2/2R1K3/8 w - - 0 1)

Croes, Govert Aliander

2nd Prize, Tijdschrift vd KNSB, 1943

b1rRrbq1/2n1n3/3B1Np1/4N3/3k4/5P2/2R1K3/8

#2

7 + 9

4872 Themes-64 1956
3098 FIDE Album (1914-1944) (I) 1971
136 Problem Observer 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4+
      • 2.Rxc4#
    • 1...Qh7
      • 2.Rc4#
    • 1...Qg7
      • 2.Rc4#
    • 1...Qh8
      • 2.Rc4#
    • 1...Bxf3+
      • 2.Sxf3#
    • 1...Sd5
      • 2.Rc4#
  • Keys
    • 1.f4!
      • threat
        • 2.Bc5#
      • 1...Qc4+
        • 2.Rxc4#
      • 1...Bf3+
        • 2.Sxf3#
      • 1...Scd5
        • 2.Sf3#
      • 1...Sed5
        • 2.Rc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(i);CHECK,N_GUARD::R1(A),XQ(i)
    • Q(i);N_GUARD::R1(A)
    • B(e);CHECK,XP(C)::S(D),XB(e)
    • S(d);P_PINS(D),S_CUTQ(i)::R1(A)
  • Actual
    • P(C);
    • Threat
      • R(G)+B(E),DCHECK
    • Vars
      • Q(i);CHECK,N_GUARD::R1(A),XQ(i)
      • B(e);CHECK,N_GUARD::S(D),XB(e)
      • S(c);S_CUTB(e)::S(D)
      • S(d);P_PINS(D),S_CUTQ(i)::R1(A)
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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).