MESON Chess Problem Database

Problem Display
PID: 89969 (KQ6/R1Pp1nn1/R1r1k3/2pN4/b1P1NPP1/8/5b2/8 w - - 0 1)

Mladenovic, Slobodan

Die Schwalbe, 1989

KQ6/R1Pp1nn1/R1r1k3/2pN4/b1P1NPP1/8/5b2/8

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Sg5#
    • 1...Sd8
      • 2.cxd8S#
    • 1...Sh5
      • 2.Qe8#
    • 1...Se8
      • 2.Qxe8#
    • 1...d6
      • 2.Qc8#
  • Tries
    • 1.Sxc5+?
      • 1...Kd6
        • 2.Qf8#
      • 1...Bxc5!
    • 1.Sg5+?
      • 1...Kd6
        • 2.Qf8#
        • 2.c8Q#
        • 2.c8S#
        • 2.c8B#
        • 2.c8R#
      • 1...Sxg5!
    • 1.Rxc6+?
      • 1...Sd6
        • 2.Sg5#
        • 2.Qg8#
      • 1...dxc6
        • 2.Qc8#
        • 2.c8Q#
        • 2.c8B#
      • 1...d6
        • 2.Qc8#
        • 2.c8Q#
        • 2.c8B#
      • 1...Bxc6+!
    • 1.Qd8?
      • threat
        • 2.Qf6#
        • 2.Qe7#
      • 1...Sxd8
        • 2.cxd8S#
      • 1...Bd4
        • 2.Qe7#
      • 1...Sf5
        • 2.Qf6#
      • 1...Sh5
        • 2.Qe7#
        • 2.Qe8#
      • 1...Se8
        • 2.Qe7#
        • 2.Qxe8#
      • 1...d6
        • 2.Qe7#
        • 2.Qc8#
      • 1...Bh4!
    • 1.Qf8?
      • threat
        • 2.Qe7#
      • 1...Bh4
        • 2.Sxc5#
      • 1...Sf5!
  • Keys
    • 1.c8S!
      • threat
        • 2.Sc7#
      • 1...Se5
        • 2.Sg5#
      • 1...Sg5
        • 2.Sxg5#
      • 1...Sd6
        • 2.Sg5#
      • 1...Sh6
        • 2.Sg5#
      • 1...Sd8
        • 2.Sg5#
      • 1...Sh8
        • 2.Sg5#
      • 1...Se8
        • 2.f5#
      • 1...d6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD,N_SPINR(d),SBLOCK::S(B)
    • S(g);OGATE::PXS(g)=S
    • S(h);N_GUARD::QAR2(J)
    • S(h);N_GUARD::QAR2(J),XS(h)
    • P(f);N_SPINR(d),OGATEB::QAB(J)
  • Tries
    • Try
      • S(B);CHECK,XP(c)
      • Vars
        • K(e);P-FLIGHT::QAB(J)
      • Refutation
        • B(a);XS(B)
    • Try
      • S(B);CHECK
      • Refutation
        • S(g);XS(B)
    • Try
      • R(F);CHECK,XR(d)
      • Refutation
        • B(b);CHECK,XR(F)
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);OGATE,XQ(J)::PXS(g)=S
        • B(a);::QAR1(J)
        • S(h);::QAR1(J)
      • Refutation
        • B(a);
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • B(a);N_GUARD::S(B),XP(c)
      • Refutation
        • S(h);
  • Actual
    • P(H);
    • Threat
      • S(E)
    • Vars
      • S(g);N_GUARD::S(B)
      • S(g);N_GUARD::S(B),XS(g)
      • S(g);N_GUARD,N_SPINR(d)::S(B)
      • S(h);N_GUARD::P(C)
      • P(f);N_SPINR(d),OGATE::R1(G)
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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).