MESON Chess Problem Database

Problem Display
PID: 51774 (Nb1nb3/p1P5/3k1Pp1/B2P2R1/q1P3r1/1P4NB/3R3K/7Q w - - 0 1)

Dikusarov, Andrey Nikolayovich

StrateGems, 2004

Nb1nb3/p1P5/3k1Pp1/B2P2R1/q1P3r1/1P4NB/3R3K/7Q

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.cxd8Q#
      • 2.cxd8R#
    • 1...Qd7
      • 2.Bb4#
    • 1...Re4
      • 2.Sxe4#
  • Tries
    • 1.Bxg4?
      • threat
        • 2.Se4#
      • 1...Kc5
        • 2.Se4#
        • 2.d6#
      • 1...Se6
        • 2.dxe6#
      • 1...Qxc4!
    • 1.c5+?
      • 1...Kd7
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Kxc5!
    • 1.cxb8Q+?
      • 1...Kd7
        • 2.Qc7#
        • 2.Qxd8#
      • 1...Kc5!
    • 1.cxd8Q+?
      • 1...Qd7
        • 2.Bb4#
      • 1...Bd7
        • 2.Qe7#
        • 2.Qf8#
      • 1...Kc5!
  • Keys
    • 1.Qe4!
      • threat
        • 2.Qe7#
      • 1...Kc5
        • 2.Qe7#
      • 1...Kd7
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Rxe4
        • 2.Sxe4#
      • 1...Qd7
        • 2.Bb4#
      • 1...Sc6
        • 2.dxc6#
      • 1...Se6
        • 2.dxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINR(b)::PXS(g)=Q
    • Q(a);N_GUARD,SBLOCK::B(H)
    • R(b);N_GUARD::S(E),XR(b)
  • Tries
    • Try
      • B(F);XR(b)
      • Threat
        • S(E)
      • Vars
        • S(g);OGATE::R(B)+P(I),XS(g)
      • Refutation
        • Q(a);XP(G)
    • Try
      • P(G);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINR(b)::PXS(g)=Q
      • Refutation
        • K(c);S_FLIGHT,XP(G)
    • Try
      • P(L);CHECK,XB(f)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(L);CHECK,XS(g)
      • Vars
        • Q(a);P_SPINQ(a)::B(H)
      • Refutation
        • K(c);P_PINS(E),S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);S_FLIGHT::QAB(A)
      • K(c);P-FLIGHT,P_SPINR(b)::PXS(g)=Q
      • R(b);XQ(A)::S(E),XR(b)
      • Q(a);N_GUARD,SBLOCK::B(H)
      • S(g);OGATE::R(B)+P(I),XS(g)
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).