MESON Chess Problem Database

Problem Display
PID: 176555 (K3Q3/1N6/2n1pp2/4kB2/8/4Pp2/b1PN1P2/2B5 w - - 0 1)

Benedek, Attila

Schach-Echo, 1980

K3Q3/1N6/2n1pp2/4kB2/8/4Pp2/b1PN1P2/2B5

#2

9 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qxe6#
    • 1...Kxf5
      • 2.Qh5#
    • 1...Bb1
      • 2.Qxe6#
  • Tries
    • 1.Sxf3+?
      • 1...Kd5
        • 2.Qxe6#
      • 1...Kxf5!
    • 1.Bb2+?
      • 1...Kd5
        • 2.Be4#
        • 2.Bxe6#
        • 2.Qd7#
        • 2.Qxe6#
        • 2.e4#
      • 1...Kxf5
        • 2.Qh5#
      • 1...Sd4!
  • Keys
    • 1.e4!
      • threat
        • 2.Sxf3#
      • 1...Kd4
        • 2.Bb2#
      • 1...Kf4
        • 2.Sc4#
      • 1...Sd4
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(c);N_SPINP(e),P-FLIGHT::QAB1(I),XP(e)
    • K(c);N_SPINP(e),OGATEB,P-FLIGHT,XB(F)::QAR2(I)
    • B(a);N_GUARD::QAR1(I),XP(e)
  • Tries
    • Try
      • S(C);CHECK,XP(b)
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT::QAB1(I),XP(e)
      • Refutation
        • K(c);N_SPINP(e),P-FLIGHT,XB(F)
    • Try
      • B(A);CHECK
      • Vars
        • K(c);N_SPINP(e),P-FLIGHT,XB(F)::QAR2(I)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • P(E);
    • Threat
      • S(C),XP(b)
    • Vars
      • K(c);N_SPINP(e),S_FLIGHT::B(A)
      • K(c);N_SPINP(e),S_FLIGHT::B(A)+S(C)
      • S(d);N_GUARD,SBLOCK::QAB(I)
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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).