MESON Chess Problem Database

Problem Display
PID: 140444 (8/b1P5/qnN4K/p2P3Q/2k3p1/1R6/P7/1n4B1 w - - 0 1)

Vakhlakov, Yuri Nikolaevich

Zadachi i Etyudi, 2001

8/b1P5/qnN4K/p2P3Q/2k3p1/1R6/P7/1n4B1

#2

8 + 7

102 Probleemblad 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Qb7
      • 2.Sxa5#
    • 1...Qc8
      • 2.Sxa5#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qd3#
        • 2.Qe4#
      • 1...Sxd5
        • 2.Qd3#
        • 2.Qf1#
      • 1...Sd2
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...Sd7
        • 2.Qd3#
      • 1...Sa8
        • 2.Qd3#
      • 1...Sc8
        • 2.Qd3#
      • 1...Sc3!
    • 1.d6?
      • threat
        • 2.Qc5#
      • 1...Qb5
        • 2.Qxb5#
      • 1...Sa4
        • 2.Qf7#
      • 1...Sd5
        • 2.Se5#
      • 1...Sd7
        • 2.Qf7#
      • 1...Sa8
        • 2.Qf7#
      • 1...Sc8
        • 2.Qf7#
      • 1...Sc3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Se5#
      • 1...Sxd5
        • 2.Qf1#
      • 1...Sa4
        • 2.d6#
      • 1...Sd7
        • 2.d6#
      • 1...Sa8
        • 2.d6#
      • 1...Sc8
        • 2.d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_GUARD::S(F),XP(d)
  • Tries
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(E)
        • S(f);P_PINS(F)::QAB1(E)
      • Refutation
        • S(a);
    • Try
      • P(D);
      • Threat
        • QAR1(E)
      • Vars
        • Q(e);N_GUARD::QAB1(E),XQ(e)
        • S(f);N_GUARD::QAB(E)
        • S(f);SBLOCK::S(F)
      • Refutation
        • S(a);
  • Actual
    • Q(E);
    • Threat
      • S(F)
    • Vars
      • S(f);P_PINS(F),P_SPINS(f),SBLOCK,XP(D)::QAB(E)
      • S(f);N_GUARD,P_PINS(F)::QAB(E)+P(D)
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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).