MESON Chess Problem Database

Problem Display
PID: 140305 (1bn5/1rq1p2B/2r1p2B/8/R2N1PP1/QP2k1PR/1pP1P3/1N3K2 w - - 0 1)

Fontaine, Leon

Probleemblad, 1976

1bn5/1rq1p2B/2r1p2B/8/R2N1PP1/QP2k1PR/1pP1P3/1N3K2

#2

14 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf4+
      • 2.gxf4#
    • 1...Qe5
      • 2.fxe5#
    • 1...e5
      • 2.Sf5#
  • Tries
    • 1.c3?
      • threat
        • 2.Sc2#
      • 1...Qxf4+
        • 2.gxf4#
      • 1...Rxc3!
    • 1.b4+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...Rc3!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Re4#
      • 1...Qxf4+
        • 2.gxf4#
      • 1...Qe5
        • 2.fxe5#
      • 1...Rc4
        • 2.bxc4#
      • 1...Sd6
        • 2.f5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(f);CHECK,OGATE,P_SPINQ(f),XP(K)::R(H)+P(G),XQ(f)
    • Q(f);OGATE::B(M)+P(K),XQ(f)
    • P(d);N_GUARD::S(J)
  • Tries
    • Try
      • P(C);
      • Threat
        • S(J)
      • Vars
        • Q(f);CHECK,OGATE,P_SPINQ(f),XP(K)::R(H)+P(G),XQ(f)
      • Refutation
        • R(c);XP(C)
    • Try
      • P(F);CHECK
      • Vars
        • K(b);S_FLIGHT,XS(J)::QAR1(E)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(J);
    • Threat
      • R1(I)
    • Vars
      • Q(f);CHECK,OGATE,P_SPINQ(f),XP(K)::R(H)+P(G),XQ(f)
      • Q(f);OGATE::B(M)+P(K),XQ(f)
      • R(c);OGATE::QAR(E)+P(F),XR(c)
      • S(i);S_CUTQ(f)::B(M)+P(K)
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).