MESON Chess Problem Database

Problem Display
PID: 147195 (Q2R4/pq1P1N1B/R1b5/1pBk2P1/r4pr1/pP1N4/K3P3/8 w - - 0 1)

Nietvelt, Gustaaf Josephus

2nd Prize, Kulisa, 1928

Q2R4/pq1P1N1B/R1b5/1pBk2P1/r4pr1/pP1N4/K3P3/8

#2

12 + 9

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qc8
      • 2.dxc8Q#
      • 2.dxc8B#
    • 1...Qxd7
      • 2.Qxc6#
    • 1...Qb8
      • 2.Qxc6#
    • 1...Bxd7
      • 2.Rd6#
      • 2.Rxd7#
      • 2.Qxb7#
  • Keys
    • 1.Bg8!
      • threat
        • 2.Sd6#
      • 1...Ke4
        • 2.Sd6#
      • 1...Ke6
        • 2.Sh6#
      • 1...Qxd7
        • 2.Qxc6#
      • 1...Rxg5
        • 2.Sxg5#
      • 1...Bxd7
        • 2.Qxb7#
      • 1...Re4
        • 2.Sfe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • Q(i);OGATE,P_SPINB(g)::PXQ(i)=Q
    • Q(i);OGATE,P_SPINB(g),P_SPINQ(i),XP(H)::QAB1(K),XB(g)
    • Q(i);OGATE,P_SPINB(g)::QAB1(K),XB(g)
  • Actual
    • B(J);
    • Threat
      • B(J)+S(I)
    • Vars
      • K(f);S_FLIGHT::S(I)
      • K(f);P_SPINB(g),S_FLIGHT::B(J)+S(I)
      • Q(i);OGATE,P_SPINB(g),P_SPINQ(i),XP(H)::QAB1(K),XB(g)
      • R(d);XP(F)::B(J)+S(I),XR(d)
      • B(g);OGATEB,P_SPINB(g),P_SPINQ(i),XP(H)::QAB(K),XQ(i)
      • R(b);SBLOCK::B(J)+S(I)
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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).