MESON Chess Problem Database

Problem Display
PID: 102455 (K2Rb3/PN1n1p2/4pP2/5p2/3kPQ2/1P6/1P1P4/4N3 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Europe Echecs, 1978

K2Rb3/PN1n1p2/4pP2/5p2/3kPQ2/1P6/1P1P4/4N3

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...fxe4
      • 2.Qd6#
    • 1...e5
      • 2.Qe3#
  • Tries
    • 1.Sg2?
      • 1...fxe4
        • 2.Qd6#
      • 1...e5
        • 2.Qe3#
      • 1...Kd3!
    • 1.Sd3?
      • threat
        • 2.Qe3#
      • 1...fxe4
        • 2.Qd6#
      • 1...Kxd3!
    • 1.Sa5?
      • 1...fxe4
        • 2.Qd6#
      • 1...e5
        • 2.Qe3#
      • 1...Kc5!
    • 1.Sc5?
      • threat
        • 2.Qd6#
      • 1...e5
        • 2.Qe3#
        • 2.Qf2#
      • 1...Kxc5!
  • Keys
    • 1.d3!
      • 1...fxe4
        • 2.Qxe4#
      • 1...e5
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(b);P_SPINP(b),SBLOCK,XP(E)::QAR2(F)
    • P(c);SBLOCK::QAB1(F)
  • Tries
    • Try
      • S(A);
      • Vars
        • P(b);P_SPINP(b),SBLOCK,XP(E)::QAR2(F)
        • P(c);SBLOCK::QAB1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Threat
        • QAB1(F)
      • Vars
        • P(b);P_SPINP(b),SBLOCK,XP(E)::QAR2(F)
      • Refutation
        • K(a);P-FLIGHT,XS(A)
    • Try
      • S(I);
      • Vars
        • P(b);P_SPINP(b),SBLOCK,XP(E)::QAR2(F)
        • P(c);SBLOCK::QAB1(F)
      • Refutation
        • K(a);N_SPINS(d),S_FLIGHT
    • Try
      • S(I);
      • Threat
        • QAR2(F)
      • Refutation
        • K(a);N_SPINS(d),S_FLIGHT,XS(I)
  • Actual
    • P(C);
    • Vars
      • P(b);OGATE,P_SPINP(b),XP(E)::QAR1(F),XP(b)
      • P(c);SBLOCK::QAB(F)
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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).