MESON Chess Problem Database

Problem Display
PID: 7334 (3N4/4nq2/5PN1/3p2P1/1K1kp2Q/2p1p3/2Pb4/B7 w - - 0 1)

Zabala Apraiz, Miguel

Problemas, 1999

3N4/4nq2/5PN1/3p2P1/1K1kp2Q/2p1p3/2Pb4/B7

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qe6
      • 2.Sxe6#
    • 1...Qe8
      • 2.Se6#
    • 1...Qg7
      • 2.Se6#
    • 1...Qh7
      • 2.Se6#
    • 1...Qf8
      • 2.Se6#
    • 1...Bc1
      • 2.Bxc3#
    • 1...Sf5
      • 2.Sc6#
    • 1...Sc6+
      • 2.Sxc6#
    • 1...Sxg6
      • 2.Sc6#
    • 1...Sc8
      • 2.Sc6#
    • 1...Sg8
      • 2.Sc6#
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe5#
      • 1...Sc6+
        • 2.Sxc6#
      • 1...Qxg6
        • 2.Se6#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Sxg6
        • 2.Sc6#
      • 1...Qe6
        • 2.Sxe6#
      • 1...e2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • Q(h);N_GUARD::S(H),XQ(h)
    • Q(h);N_GUARD::S(H)
    • B(a);N_GUARD::B(A),XP(b)
    • S(g);N_GUARD::S(H)
    • S(g);CHECK,N_GUARD::S(H),XS(g)
    • S(g);N_GUARD,XS(G)::S(H)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • S(g);CHECK,N_GUARD::S(H),XS(g)
      • Q(h);N_GUARD,XS(G)::S(H)
      • Q(h);OGATE,XP(F)::QAB(D),XQ(h)
      • S(g);N_GUARD,XS(G)::S(H)
      • Q(h);N_GUARD::S(H),XQ(h)
      • P(c);OGATE::QAR2(D),XB(a)
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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).