MESON Chess Problem Database

Problem Display
PID: 250273 (1Q6/8/1P2b3/6B1/1K3Nq1/2R3p1/4Nk2/R4B2 w - - 0 1)

Nietvelt, Gustaaf Josephus

Magyar Sakkvilag, 1927

1Q6/8/1P2b3/6B1/1K3Nq1/2R3p1/4Nk2/R4B2

#2

9 + 4

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4+
      • 2.Qxf4#
  • Keys
    • 1.Qf8!
      • threat
        • 2.Qc5#
      • 1...Qxf4+
        • 2.Qxf4#
      • 1...Qxe2
        • 2.Sh3#
      • 1...Qxg5
        • 2.Sh3#
      • 1...Qf3
        • 2.Sd3#
      • 1...Qf5
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(c);CHECK,OGATE,XS(F)::QAR2(I),XQ(c)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::QAR2(I),XQ(c)
      • Q(c);N_PINS(F),XS(C)::QAR(I)+S(F),DCHECK
      • Q(c);N_PINS(F),XB(G)::QAR(I)+S(F),DCHECK
      • Q(c);N_PINS(F)::S(F)
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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).