MESON Chess Problem Database

Problem Display
PID: 173920 (Q7/1p2q3/4NPp1/5kn1/5p1R/8/BBN4b/2K1R3 w - - 0 1)

Stan, Mihail

Revista de Sah, 1961

Q7/1p2q3/4NPp1/5kn1/5p1R/8/BBN4b/2K1R3

#2

9 + 7

15202 Componist 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.Sg7#
    • 1...Qb4
      • 2.Sg7#
    • 1...Qc5
      • 2.Sg7#
    • 1...Qd6
      • 2.Sg7#
    • 1...Qd8
      • 2.Sg7#
    • 1...Qg7
      • 2.Sxg7#
    • 1...Qe8
      • 2.Sg7#
    • 1...Bg1
      • 2.Rxf4#
    • 1...f3
      • 2.Se3#
    • 1...b5
      • 2.Qd5#
    • 1...b6
      • 2.Qd5#
  • Tries
    • 1.Qa5+?
      • 1...Qc5
        • 2.Sg7#
        • 2.Qxc5#
      • 1...b5!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qd5#
      • 1...Qxf6
        • 2.Qxf6#
      • 1...Qxd8
        • 2.Sg7#
      • 1...Qxe6
        • 2.Sd4#
      • 1...Qc5
        • 2.Sg7#
      • 1...Qd6
        • 2.Sg7#
      • 1...Qc7
        • 2.Sd4#
      • 1...Qd7
        • 2.Re5#
      • 1...Sf3
        • 2.Qd3#
      • 1...Sf7
        • 2.Qd3#
      • 1...f3
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • Q(g);N_GUARD,P_PINB(D)::S(G)
    • Q(g);N_GUARD::S(G)
    • Q(g);N_GUARD,P_PINS(E)::S(G)
    • Q(g);N_GUARD::S(G),XQ(g)
    • B(a);N_GUARD::R1(F),XP(b)
    • P(b);N_GUARD::S(E)
    • P(f);OGATE::QAR2(I)
  • Tries
    • Try
      • Q(I);CHECK
      • Refutation
        • P(f);P_SPINP(f)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I)
    • Vars
      • Q(g);OGATE,XP(H)::QAR1(I),XQ(g)
      • Q(g);N_GUARD,XQ(I)::S(G)
      • Q(g);XS(G)::S(E)
      • Q(g);N_GUARD,P_PINS(E)::S(G)
      • Q(g);N_GUARD::S(G)
      • Q(g);P_PINS(E)::S(G)
      • Q(g);::R1(B)
      • S(d);N_GUARD::QAB(I)
      • P(b);N_GUARD::S(E)
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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).