MESON Chess Problem Database

Problem Display
PID: 6558 (8/7Q/Np2PK2/3kP3/bpr1NR2/4b3/8/2R3B1 w - - 0 1)

Nietvelt, Gustaaf Josephus

2nd Place, Skakbladet, 1931

8/7Q/Np2PK2/3kP3/bpr1NR2/4b3/8/2R3B1

#2

9 + 6

3098 FIDE Album (1914-1944) (I) 1971

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Sc3#
    • 1...Kc6
      • 2.Qd7#
    • 1...Rd4
      • 2.Sc7#
    • 1...Rxe4
      • 2.Qxe4#
    • 1...Bd1
      • 2.Qd7#
    • 1...Bc2
      • 2.Qd7#
    • 1...Bb3
      • 2.Qd7#
    • 1...Bd7
      • 2.Qxd7#
    • 1...b5
      • 2.Qd7#
  • Tries
    • 1.Sc3+?
      • 1...Kc6
        • 2.Qc7#
        • 2.Qd7#
      • 1...Rxc3
        • 2.Qe4#
        • 2.Qh1#
      • 1...bxc3!
  • Keys
    • 1.Qh1!
      • threat
        • 2.Sc3#
      • 1...Kd4
        • 2.Sec5#
      • 1...Kc6
        • 2.Sd6#
      • 1...Rxe4
        • 2.Qxe4#
      • 1...Rc3
        • 2.Sd2#
        • 2.Sf2#
        • 2.Sxc3#
        • 2.Sg3#
        • 2.Sec5#
        • 2.Sg5#
        • 2.Sd6#
      • 1...Rd4
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(e);P-FLIGHT,P_SPINB(a)::R(D)+S(C)
    • K(e);P_SPINR(d),S_FLIGHT::QAB1(I)
    • R(d);N_GUARD,SBLOCK::S(F)
    • R(d);OGATE,XS(C)::QAB1(I),XR(d)
    • B(b);N_GUARD::QAR2(I)
    • B(b);N_GUARD::QAR2(I),XB(b)
    • P(f);S_CUTB(b)::QAR2(I)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • P(c);XS(C)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+S(C),DCHECK
    • Vars
      • K(e);P-FLIGHT,P_SPINB(a)::R(D)+S(C)
      • K(e);P_SPINR(d),S_FLIGHT::QAB(I)+S(C)
      • R(d);OGATE,P_SPINR(d),XS(C)::QAB1(I),XR(d)
      • R(d);N_GUARD,SBLOCK::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).