MESON Chess Problem Database

Problem Display
PID: 11273 (5Q2/8/8/1KR5/1n6/1k6/3P4/R7 w - - 0 1)

Korepin, Aleksandr

Shakhmaty v SSSR, 1937

5Q2/8/8/1KR5/1n6/1k6/3P4/R7

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Tries
    • 1.Qf3+?
      • 1...Kb2
        • 2.Qa3#
        • 2.Qc3#
      • 1...Sd3!
    • 1.Qa8?
      • threat
        • 2.Rb1#
        • 2.Qa3#
      • 1...Kb2
        • 2.Qa3#
      • 1...Sa2
        • 2.Rb1#
        • 2.Qxa2#
      • 1...Sc2
        • 2.Rb1#
        • 2.Qa2#
      • 1...Sd3
        • 2.Qa2#
        • 2.Qa3#
      • 1...Sa6!
  • Keys
    • 1.Rcc1!
      • threat
        • 2.Qxb4#
      • 1...Kb2
        • 2.Qxb4#
      • 1...Sa2
        • 2.Rab1#
      • 1...Sc2
        • 2.Rcb1#
      • 1...Sd3
        • 2.Qa3#
      • 1...Sd5
        • 2.Qa3#
      • 1...Sa6
        • 2.Qa3#
      • 1...Sc6
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
      • Refutation
        • S(b);
  • Actual
    • R(D);
    • Threat
      • QAR1(E),XS(b)
    • Vars
      • K(a);P-FLIGHT::QAR2(E),XS(b)
      • S(b);SBLOCK::R(A)
      • S(b);SBLOCK::R(D)
      • S(b);OGATE::QAR1(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).