MESON Chess Problem Database

Problem Display
PID: 55185 (NbB1n1b1/2P2P2/R1P1p3/2Pk4/N2prP2/1KpRn3/1P6/7Q w - - 0 1)

Stojnic, Dragan

The Problemist, 2004

NbB1n1b1/2P2P2/R1P1p3/2Pk4/N2prP2/1KpRn3/1P6/7Q

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...e5
      • 2.fxg8Q#
      • 2.fxg8B#
  • Tries
    • 1.Qh5+?
      • 1...Re5
        • 2.Qxe5#
      • 1...e5
        • 2.fxg8Q#
        • 2.fxg8B#
      • 1...Sf5!
    • 1.fxe8Q?
      • threat
        • 2.S8b6#
        • 2.Qd7#
        • 2.Qd8#
      • 1...Bxc7
        • 2.Sxc7#
      • 1...Ba7
        • 2.Qd7#
        • 2.Qd8#
      • 1...Sf5
        • 2.S8b6#
      • 1...Sc4!
    • 1.fxg8Q?
      • threat
        • 2.Bxe6#
        • 2.Qxe6#
      • 1...Sxc7
        • 2.Qd8#
      • 1...Sg7
        • 2.Qd8#
      • 1...Sg2!
    • 1.f8Q?
      • threat
        • 2.Sxc3#
      • 1...cxb2
        • 2.Sc3#
      • 1...Sd6
        • 2.Qxd6#
      • 1...c2
        • 2.Sc3#
      • 1...Sd1!
  • Keys
    • 1.bxc3!
      • threat
        • 2.Rxd4#
      • 1...Sc2
        • 2.c4#
      • 1...Sg2
        • 2.c4#
      • 1...Sf5
        • 2.c4#
      • 1...e5
        • 2.fxg8Q#
        • 2.fxg8B#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(f);::PXB(i)=Q
  • Tries
    • Try
      • Q(A);CHECK,N_PINR(d)
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAR1(A),XR(d)
        • P(f);S_CUTR(d),S_CUTS(b)::PXB(i)=Q
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • P(K);XS(h)
      • Threat
        • DUALS(3)
      • Vars
        • B(g);XP(J)::S(L),XB(g)
        • S(b);::S(L)
      • Refutation
        • S(b);
    • Try
      • P(K);XB(i)
      • Threat
        • DUALS(2)
      • Vars
        • S(h);OGATE,XP(J)::QAR(K)
        • S(h);OGATE::QAR(K)
      • Refutation
        • S(b);N_SPINR(d)
    • Try
      • P(K);
      • Threat
        • S(E),XP(a)
      • Vars
        • P(a);XP(B)::S(E)
        • S(h);N_GUARD::QAR1(K),XS(h)
        • P(a);::S(E)
      • Refutation
        • S(b);
  • Actual
    • P(B);XP(a)
    • Threat
      • R1(D),XP(c)
    • Vars
      • S(b);N_GUARD::P(B)
      • S(b);N_GUARD,N_SPINR(d)::P(B)
      • P(f);::PXB(i)=Q
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).