MESON Chess Problem Database

Problem Display
PID: 146132 (6nq/pKn3b1/1pQ3p1/r7/pP2N1B1/2p4p/P1k3bR/B2R4 w - - 0 1)

Fjeld, Thorstein

Norsk Sjakkblad, 1933

6nq/pKn3b1/1pQ3p1/r7/pP2N1B1/2p4p/P1k3bR/B2R4

#2

9 + 13

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxa4#
    • 1...Rd5
      • 2.Qxa4#
    • 1...Re5
      • 2.Qxa4#
      • 2.Qxc3#
    • 1...Rf5
      • 2.Qxa4#
    • 1...Rg5
      • 2.Qxa4#
    • 1...Rh5
      • 2.Qxa4#
    • 1...Sf6
      • 2.Qxc3#
  • Tries
    • 1.Sc5?
      • threat
        • 2.Qe4#
      • 1...Sd5
        • 2.Qxg6#
      • 1...Sf6!
    • 1.Qc4?
      • threat
        • 2.Qe2#
        • 2.Qd3#
      • 1...Qh6
        • 2.Qd3#
      • 1...Bh6
        • 2.Qd3#
      • 1...Rd5!
  • Keys
    • 1.Sxc3!
      • threat
        • 2.Qe4#
      • 1...Rd5
        • 2.Qxa4#
      • 1...Re5
        • 2.Sd5#
      • 1...Sd5
        • 2.Qxg6#
      • 1...Sf6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD,N_SPINP(c)::QAB(H),XP(e)
    • R(f);N_GUARD::QAB(H),XP(e)
    • S(l);S_CUTB(k)::QAR1(H),XP(c)
  • Tries
    • Try
      • S(F);N_PINP(c),P_SPINQ(H)
      • Threat
        • QAB(H)
      • Vars
        • S(j);N_PINQ(H)::QAB(H),XP(h)
      • Refutation
        • S(l);
    • Try
      • Q(H);P_SPINS(F)
      • Threat
        • DUALS(2)
      • Vars
        • Q(m);::QAB1(H)
        • B(k);::QAB1(H)
      • Refutation
        • R(f);N_PINS(F)
  • Actual
    • S(F);P_SPINQ(H),XP(c)
    • Threat
      • QAB(H)
    • Vars
      • R(f);N_PINQ(H)::QAB(H),XP(e)
      • R(f);N_GUARD,S_CUTB(k)::QAR(H)+S(F)
      • S(j);N_PINQ(H)::QAB(H),XP(h)
      • S(l);S_CUTB(k)::QAR(H)+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).