MESON Chess Problem Database

Problem Display
PID: 22293 (8/1N1Q4/6N1/3b4/3k4/P7/3K4/8 w - - 0 1)

Chepizhni, Viktor Ivanovich

Birnov MT, 1966

8/1N1Q4/6N1/3b4/3k4/P7/3K4/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991
145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qa4#
    • 1...Ke4
      • 2.Qg4#
  • Tries
    • 1.Sa5?
      • 1...Ke4
        • 2.Qg4#
      • 1...Kc5!
    • 1.Qb5?
      • threat
        • 2.Qd3#
      • 1...Ke4
        • 2.Qd3#
      • 1...Bc4
        • 2.Qe5#
      • 1...Be4
        • 2.Qc5#
      • 1...Bxb7!
    • 1.Qf5?
      • threat
        • 2.Qd3#
      • 1...Kc4
        • 2.Qd3#
      • 1...Bc4
        • 2.Qe5#
      • 1...Be4
        • 2.Qc5#
      • 1...Bxb7!
    • 1.a4?
      • 1...Ke4
        • 2.Qg4#
      • 1...Kc4!
  • Keys
    • 1.Qd6!
      • 1...Kc4
        • 2.Qb4#
      • 1...Ke4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(a);N_SPINB(b),P-FLIGHT::QAR2(E)
  • Tries
    • Try
      • S(D);
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);N_SPINB(b),S_FLIGHT
    • Try
      • Q(E);N_PINB(b)
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
        • B(b);OGATE,SBLOCK::QAB1(E)
        • B(b);SBLOCK::QAB1(E)
      • Refutation
        • B(b);XS(D)
    • Try
      • Q(E);N_PINB(b)
      • Threat
        • QAR1(E)
      • Vars
        • K(a);P-FLIGHT::QAB1(E)
        • B(b);SBLOCK::QAB1(E)
        • B(b);OGATE,SBLOCK::QAB1(E)
      • Refutation
        • B(b);XS(D)
    • Try
      • P(B);
      • Vars
        • K(a);N_SPINB(b),P-FLIGHT::QAR2(E)
      • Refutation
        • K(a);N_SPINB(b),P-FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);N_SPINB(b),P-FLIGHT::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).