MESON Chess Problem Database

Problem Display
PID: 69562 (8/2pqp1N1/1QBkP2r/1Pp5/N7/2Brb1Rp/3p4/3K4 w - - 0 1)

Fontaine, Leon

Het Belgisch Schaakbord (L'Echiquier Belge), 1957

8/2pqp1N1/1QBkP2r/1Pp5/N7/2Brb1Rp/3p4/3K4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6
      • 2.Qxc6#
    • 1...Qxe6
      • 2.Se8#
    • 1...Rd4
      • 2.Qxc5#
    • 1...Rxe6
      • 2.Sf5#
    • 1...Bf4
      • 2.Rxd3#
      • 2.Qxc5#
    • 1...Bg5
      • 2.Rxd3#
      • 2.Qxc5#
  • Keys
    • 1.Rg5!
      • threat
        • 2.Be5#
      • 1...Qxc6
        • 2.Qxc6#
      • 1...Qxe6
        • 2.Se8#
      • 1...Rxc3
        • 2.Rd5#
      • 1...Rxe6
        • 2.Sf5#
      • 1...Bxg5
        • 2.Qxc5#
      • 1...Rd4
        • 2.Qxc5#
      • 1...Rd5
        • 2.Rxd5#
      • 1...Bd4
        • 2.Rd5#
      • 1...Bf4
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • Q(i);OGATE,P_SPINQ(i),XB(G)::QAR1(F),XQ(i)
    • Q(i);N_GUARD,SBLOCK,XP(H)::S(I)
    • R(b);S_CUTB(c)::QAB1(F),XP(e)
    • R(g);SBLOCK,XP(H)::S(I)
  • Actual
    • R(C);
    • Threat
      • B(B)
    • Vars
      • Q(i);OGATE,P_SPINQ(i),XB(G)::QAR1(F),XQ(i)
      • Q(i);N_GUARD,SBLOCK,XP(H)::S(I)
      • R(b);N_GUARD,XB(B)::R1(C)
      • R(g);SBLOCK,XP(H)::S(I)
      • B(c);N_GUARD,XR(C)::QAB1(F),XP(e)
      • R(b);S_CUTB(c)::QAB1(F),XP(e)
      • R(b);N_GUARD::R1(C),XR(b)
      • B(c);S_CUTR(b)::R1(C)
      • B(c);N_GUARD::QAB1(F),XP(e)
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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).