MESON Chess Problem Database

Problem Display
PID: 4740 (3Q4/8/5n2/8/2k1n3/3NPB2/1K5B/3R4 w - - 0 1)

Nanning, Alexander Karel

Utrecht Dagblad, 1889

3Q4/8/5n2/8/2k1n3/3NPB2/1K5B/3R4

#2

7 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qc7+?
      • 1...Kd5
        • 2.Sf4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kb5!
    • 1.Qc8+?
      • 1...Kd5
        • 2.Sc1#
        • 2.Se1#
        • 2.Sf2#
        • 2.Sb4#
        • 2.Se5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Kb5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Se5#
        • 2.Qb3#
      • 1...Kd5
        • 2.Se5#
      • 1...Sd2
        • 2.Se5#
        • 2.Qa6#
      • 1...Sc5
        • 2.Se5#
        • 2.Qxc5#
        • 2.Qb4#
      • 1...Sg4
        • 2.Qb3#
      • 1...Sd7
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(a);P_SPINS(b),S_FLIGHT::R(A)+S(D),DCHECK
        • S(b);N_GUARD,P_SPINS(b)::QAR1(G),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAR1(G),XS(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(G);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::R(A)+S(D)
      • S(c);::QAB1(G)
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).