MESON Chess Problem Database

Problem Display
PID: 147925 (1b5r/p2P2N1/2p1prpn/Q3N3/3pkp1R/3q1RnK/6p1/1B3bB1 w - - 0 1)

Nietvelt, Gustaaf Josephus

Il Problema, 1931

1b5r/p2P2N1/2p1prpn/Q3N3/3pkp1R/3q1RnK/6p1/1B3bB1

#2

9 + 15

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Bxd3#
    • 1...Sgf5
      • 2.Rxf4#
    • 1...Shf5
      • 2.Rxf4#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Re3#
        • 2.Rxd4#
      • 1...Bxd3
        • 2.Bxd3#
      • 1...Bxe5
        • 2.Re3#
      • 1...c5!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qxd4#
      • 1...Bxe5
        • 2.Qxc6#
      • 1...Se2
        • 2.Bxd3#
      • 1...Sgf5
        • 2.Rxf4#
      • 1...Shf5
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(d);P_PINR(C),S_CUTB(a)::B(A),XQ(c)
    • S(d);P_PINR(C),S_CUTR(j)::R1(E),XP(g)
    • S(l);P_PINR(E),S_CUTR(j)::R1(C),XP(g)
  • Tries
    • Try
      • R(C);XQ(c)
      • Threat
        • DUALS(2)
      • Vars
        • B(a);OGATE,P_SPINB(a),XR(C)::B(A),XB(a)
        • B(n);XS(G)::B(A)+R(C),DCHECK
      • Refutation
        • P(h);
  • Actual
    • Q(F);
    • Threat
      • QAR1(F),XP(e)
    • Vars
      • B(n);SBLOCK,XS(G)::QAB(F),XP(h)
      • S(d);P_PINR(C),S_CUTB(a)::B(A),XQ(c)
      • S(d);P_PINR(C),S_CUTR(j)::R1(E),XP(g)
      • S(l);P_PINR(E),S_CUTR(j)::R1(C),XP(g)
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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).