MESON Chess Problem Database

Problem Display
PID: 188005 (3q4/8/n1NPPP2/1pP3p1/2R1Nk1b/4r2B/3Q1PPP/2Kn4 w - - 0 1)

Khachaturov, Sergei

harmonie-aktiv, 2014

3q4/8/n1NPPP2/1pP3p1/2R1Nk1b/4r2B/3Q1PPP/2Kn4

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6
      • 2.Qxd6#
    • 1...Bg3
      • 2.fxg3#
      • 2.hxg3#
    • 1...Sb2
      • 2.Qxe3#
      • 2.fxe3#
    • 1...Sc3
      • 2.Qxe3#
      • 2.fxe3#
    • 1...b4
      • 2.Sc3#
      • 2.Sg3#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sc3#
        • 2.Sg3#
      • 1...Qxf6
        • 2.Sxf6#
      • 1...Qxd6
        • 2.Sxd6#
      • 1...Sxf2
        • 2.Sxf2#
      • 1...Sxc5
        • 2.Sxc5#
      • 1...Bg3
        • 2.Sc3#
        • 2.Sxg3#
        • 2.fxg3#
        • 2.hxg3#
      • 1...Sc3
        • 2.Sxc3#
        • 2.Qxe3#
        • 2.fxe3#
      • 1...g4!
    • 1.g3+?
      • 1...Kf3
        • 2.Se5#
      • 1...Bxg3!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qe5#
      • 1...Rc3+
        • 2.Sxc3#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Rxh3
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(h);OGATE,XP(K)::QAB(B),XQ(h)
  • Tries
    • Try
      • R(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);XP(M)::R(G)+S(H),XQ(h)
        • Q(h);XP(K)::R(G)+S(H),XQ(h)
        • S(a);XP(C)::R(G)+S(H),XS(a)
        • S(g);XP(I)::R(G)+S(H),XS(g)
      • Refutation
        • P(f);
    • Try
      • P(D);CHECK
      • Vars
        • K(c);N_SPINR(b),P-FLIGHT::S(J)
      • Refutation
        • B(d);XP(D)
  • Actual
    • Q(B);N_PINR(b)
    • Threat
      • QAB1(B)
    • Vars
      • R(b);CHECK,N_GUARD::QAR(B)+S(H),XR(b)
      • Q(h);OGATE,XP(M)::QAR2(B),XQ(h)
      • Q(h);OGATE,XP(K)::QAB(B),XQ(h)
      • R(b);N_GUARD,XB(F)::QAR(B)+S(H)
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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).