MESON Chess Problem Database

Problem Display
PID: 200609 (8/1Q3N1K/r4p2/3n3p/4k3/1nP4R/8/5R1N w - - 0 1)

Chernikh, Vassily

Zadachi i Etyudi, 2017

8/1Q3N1K/r4p2/3n3p/4k3/1nP4R/8/5R1N

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qb1#
  • Tries
    • 1.Qb4+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sxb4!
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...Sxc3
        • 2.Qd3#
      • 1...Re6
        • 2.Qxe6#
      • 1...Se3
        • 2.Sg3#
      • 1...Sf4
        • 2.Sf2#
      • 1...Se7
        • 2.Qd3#
      • 1...f5
        • 2.Qxf5#
      • 1...Sd4!
    • 1.Qe7+?
      • 1...Re6
        • 2.Qxe6#
      • 1...Sxe7!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qd3#
      • 1...Sc1
        • 2.Qc4#
      • 1...Sc5
        • 2.Qc4#
      • 1...Se3
        • 2.Sg3#
      • 1...Sb4
        • 2.Qf5#
      • 1...Sf4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE::QAB(E)
  • Tries
    • Try
      • Q(E);CHECK,N_PINS(c)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(E),XS(a)
      • Refutation
        • S(c);XQ(E)
    • Try
      • Q(E);N_PINS(c)
      • Threat
        • QAB1(E)
      • Vars
        • S(c);OGATE,XP(C)::QAB1(E)
        • R(e);N_GUARD::QAR2(E),XR(e)
        • S(c);SBLOCK::S(B)
        • S(c);OGATE::QAB1(E)
        • P(f);::QAB1(E),XP(f)
      • Refutation
        • S(a);
    • Try
      • Q(E);CHECK,N_PINS(c)
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAR2(E),XR(e)
      • Refutation
        • S(c);XQ(E)
  • Actual
    • Q(E);N_PINS(c)
    • Threat
      • QAB1(E)
    • Vars
      • S(a);N_GUARD::QAR2(E)
      • S(c);SBLOCK::S(B)
      • S(c);OGATE::QAB1(E)
HTML5 logo

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).