MESON Chess Problem Database

Problem Display
PID: 6891 (3K4/1N1N4/B1p1bp2/1R6/k1r1pQ2/P2R4/1Pp2q2/4b3 w - - 0 1)

Fleck, Ferenc

1st Prize, Norsk Sjakkblad, 1934

3K4/1N1N4/B1p1bp2/1R6/k1r1pQ2/P2R4/1Pp2q2/4b3

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qg3
      • 2.Sb6#
    • 1...Qh4
      • 2.Sb6#
    • 1...Qb6+
      • 2.Sxb6#
    • 1...Qf1
      • 2.Sb6#
    • 1...Qd2
      • 2.Sb6#
    • 1...Qe2
      • 2.Sb6#
    • 1...Qg2
      • 2.Sb6#
    • 1...Qh2
      • 2.Sb6#
    • 1...Qf3
      • 2.Sb6#
    • 1...Qxf4
      • 2.Sb6#
    • 1...Rc3
      • 2.Rb4#
    • 1...Rb4
      • 2.Ra5#
    • 1...Rd4
      • 2.Sc5#
    • 1...Rc5
      • 2.Sb6#
    • 1...Ba5+
      • 2.Rxa5#
    • 1...e3
      • 2.Sbc5#
      • 2.Sdc5#
      • 2.Sb6#
    • 1...c5
      • 2.Sb6#
  • Tries
    • 1.Sbc5+?
      • 1...Rxc5
        • 2.Sb6#
      • 1...Qxc5!
    • 1.Qxf2?
      • threat
        • 2.Sb6#
      • 1...Ba5+
        • 2.Rxa5#
      • 1...Bxf2
        • 2.Ra5#
      • 1...Rd4
        • 2.Sc5#
      • 1...Bxd7!
  • Keys
    • 1.Qc1!
      • threat
        • 2.b3#
      • 1...Qb6+
        • 2.Sxb6#
      • 1...Ba5+
        • 2.Rxa5#
      • 1...Rc3
        • 2.Rb4#
      • 1...Rb4
        • 2.Ra5#
      • 1...Rd4
        • 2.Sc5#
      • 1...Rc5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::S(H)
    • Q(c);CHECK,N_GUARD::S(H),XQ(c)
    • Q(c);N_GUARD,XQ(D)::S(H)
    • R(e);N_GUARD,P_SPINP(f),S_CUTB(a)::R1(E)
    • R(e);S_CUTB(a)::R1(E)
    • R(e);N_GUARD,P_PINS(H),S_CUTQ(c)::S(G)
    • R(e);P_SPINP(f),S_CUTQ(c)::S(H)
    • B(a);CHECK,N_GUARD::R1(E),XB(a)
    • P(g);S_CUTQ(c)::S(H)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • R(e);P_SPINP(f),XS(G)::S(H)
      • Refutation
        • Q(c);XS(G)
    • Try
      • Q(D);XQ(c)
      • Threat
        • S(H)
      • Vars
        • B(a);CHECK,N_GUARD::R1(E),XB(a)
        • B(a);N_GUARD,XQ(D)::R1(E)
        • R(e);N_GUARD,P_PINS(H)::S(G)
      • Refutation
        • B(h);XS(H)
  • Actual
    • Q(D);
    • Threat
      • P(A)
    • Vars
      • Q(c);CHECK,N_GUARD::S(H),XQ(c)
      • B(a);CHECK,N_GUARD::R1(E),XB(a)
      • R(e);N_GUARD,S_CUTB(a)::R1(E)
      • R(e);S_CUTB(a)::R1(E)
      • R(e);N_GUARD,P_PINS(H),S_CUTQ(c)::S(G)
      • R(e);S_CUTQ(c)::S(H)
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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).