MESON Chess Problem Database

Problem Display
PID: 91897 (4b3/Pn2Rq2/pNkPp3/P1P1Pp2/1KQ1n3/7B/8/8 w - - 0 1)

Hayrabedian, Krikor

Shakhmatna misl, 1953

4b3/Pn2Rq2/pNkPp3/P1P1Pp2/1KQ1n3/7B/8/8

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Rc7#
    • 1...Qg6
      • 2.Rc7#
    • 1...Qg8
      • 2.Rc7#
    • 1...Qf6
      • 2.Rc7#
    • 1...Qf8
      • 2.Rc7#
    • 1...Sexc5
      • 2.Bg2#
    • 1...Sbxc5
      • 2.a8Q#
      • 2.a8B#
    • 1...f4
      • 2.Qxe4#
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Qc8#
      • 1...Qxe6
        • 2.Rc7#
      • 1...Qxe7
        • 2.Qd5#
      • 1...Sexd6
        • 2.Bg2#
      • 1...Sbxd6
        • 2.a8Q#
        • 2.a8B#
      • 1...Bd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD::R1(J)
    • S(a);OGATEB,P_SPINS(a),XP(E)::B(A)
    • S(f);P_SPINS(f),XP(E)::P=Q
    • P(b);N_GUARD::QAB(C),XS(a)
  • Actual
    • Q(C);XP(e)
    • Threat
      • QAR2(C)
    • Vars
      • Q(g);N_GUARD,XQ(C)::R1(J)
      • Q(g);N_GUARD,XR(J)::QAB1(C)
      • S(a);OGATEB,P_SPINS(a),XP(H)::B(A)
      • S(f);P_SPINS(f),XP(H)::P=Q
      • B(h);N_GUARD::QAB1(C),XB(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).