MESON Chess Problem Database

Problem Display
PID: 57449 (r4RBK/r6P/p3pB2/4bk1P/3pN1p1/3N1P1b/5Qp1/8 w - - 0 1)

Nietvelt, Gustaaf Josephus

1st Prize, Vlaamse Problemistenbond, 1926

r4RBK/r6P/p3pB2/4bk1P/3pN1p1/3N1P1b/5Qp1/8

#2

10 + 10

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1953
5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh7+
      • 2.Bxh7#
    • 1...Bg3
      • 2.Sxg3#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bxf6+
      • 2.Rxf6#
    • 1...Bc7
      • 2.Bd8#
    • 1...Bb8
      • 2.Be7#
  • Tries
    • 1.Bxe5+?
      • 1...Rf7
        • 2.Rxf7#
      • 1...Rxf8!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxe5#
      • 1...Rxh7+
        • 2.Bxh7#
      • 1...Bxf6+
        • 2.Rxf6#
      • 1...Bxg3
        • 2.Sxg3#
      • 1...gxf3
        • 2.Qg6#
      • 1...Bf4
        • 2.Qxf4#
      • 1...Bd6
        • 2.Sxd6#
      • 1...Bc7
        • 2.Bd8#
      • 1...Bb8
        • 2.Be7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(i);CHECK,OGATE,XP(G)::B(I),XR(i)
    • B(e);N_GUARD,N_PINB(F)::S(D),XB(e)
    • B(e);CHECK,OGATE,P_SPINB(e),XB(F)::R1(H),XB(e)
    • B(e);N_PINB(F)::R(H)+B(F)
  • Tries
    • Try
      • B(F);CHECK,N_SPINB(F),XB(e)
      • Vars
        • R(i);N_GUARD,P_SPINR(i)::R(H),XR(i)
      • Refutation
        • R(j);P_PINB(I),XR(H)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XB(e)
    • Vars
      • R(i);CHECK,OGATE,XP(G)::B(I),XR(i)
      • B(e);CHECK,OGATE,P_SPINB(e),XB(F)::R1(H),XB(e)
      • B(e);N_PINB(F),XQ(A)::S(D),XB(e)
      • P(d);OGATE,XP(C)::QAB1(A)
      • B(e);N_GUARD,N_PINB(F)::QAR1(A),XB(e)
      • B(e);N_GUARD,N_PINB(F)::S(D),XB(e)
      • B(e);N_PINB(F)::R(H)+B(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).