MESON Chess Problem Database

Problem Display
PID: 27230 (8/8/8/3P4/2p5/Pnkp4/4Q3/bR1K4 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

8/8/8/3P4/2p5/Pnkp4/4Q3/bR1K4

#2

5 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bb2
      • 2.Qxb2#
    • 1...Sc1
      • 2.Qe5#
    • 1...Sd2
      • 2.Qe5#
    • 1...Sd4
      • 2.Qd2#
    • 1...Sa5
      • 2.Qe5#
    • 1...Sc5
      • 2.Qe5#
    • 1...d2
      • 2.Qe3#
  • Tries
    • 1.Qe1+?
      • 1...Sd2
        • 2.Qe5#
      • 1...d2
        • 2.Qe3#
      • 1...Kd4!
    • 1.Qe3?
      • 1...Sc1
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe5#
      • 1...Sd4
        • 2.Qd2#
      • 1...Sa5
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
      • 1...Bb2!
  • Keys
    • 1.Qf2!
      • 1...d2
        • 2.Qe3#
      • 1...Bb2
        • 2.Qxb2#
      • 1...Sc1
        • 2.Qf6#
      • 1...Sd2
        • 2.Qf6#
      • 1...Sd4
        • 2.Qd2#
      • 1...Sa5
        • 2.Qf6#
      • 1...Sc5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(C),XB(a)
    • S(b);N_GUARD::QAB(C)
    • S(b);N_GUARD,SBLOCK::QAB1(C)
    • P(d);OGATEB::QAR2(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB(C)
        • P(d);OGATEB,P_SPINP(d)::QAR2(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);P_PINP(d)
      • Vars
        • S(b);N_GUARD::QAB(C)
        • S(b);N_GUARD,SBLOCK::QAB1(C)
      • Refutation
        • B(a);
  • Actual
    • Q(C);
    • Vars
      • P(d);OGATEB::QAR2(C)
      • B(a);N_GUARD::QAB1(C),XB(a)
      • S(b);N_GUARD::QAB(C)
      • S(b);N_GUARD,SBLOCK::QAB1(C)
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).