MESON Chess Problem Database

Problem Display
PID: 27229 (6Q1/8/6p1/2Rp4/4Pk2/4nP2/5R2/2B1K3 w - - 0 1)

Lebeck, Donald

Mate in Two!! (Lebeck), 1992

6Q1/8/6p1/2Rp4/4Pk2/4nP2/5R2/2B1K3

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Qb8#
    • 1...d4
      • 2.Qb8#
    • 1...g5
      • 2.Qb8#
  • Tries
    • 1.Qxd5?
      • threat
        • 2.Qe5#
        • 2.Qg5#
        • 2.Qd6#
      • 1...g5
        • 2.Qe5#
        • 2.Qxg5#
        • 2.Qd6#
      • 1...Kg3!
    • 1.Qxg6?
      • 1...dxe4
        • 2.Rf5#
        • 2.Qg4#
        • 2.Qg5#
        • 2.Qd6#
        • 2.fxe4#
      • 1...d4
        • 2.Rf5#
        • 2.Qg4#
        • 2.Qg5#
        • 2.Qd6#
      • 1...Ke5!
  • Keys
    • 1.Qh8!
      • 1...Kg3
        • 2.Qh2#
      • 1...Kg5
        • 2.Bxe3#
      • 1...dxe4
        • 2.Qe5#
        • 2.Qh2#
        • 2.Qh4#
        • 2.Qb8#
      • 1...d4
        • 2.Qe5#
        • 2.Qh2#
        • 2.Qh4#
        • 2.Qb8#
      • 1...g5
        • 2.Qh2#
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • P(c);XP(E)::QAB(G)
    • P(c);::QAB(G)
    • P(d);SBLOCK::QAB(G)
  • Tries
    • Try
      • Q(G);XP(c)
      • Threat
        • DUALS(3)
      • Refutation
        • K(b);N_SPINS(a),S_FLIGHT
    • Try
      • Q(G);XP(d)
      • Refutation
        • K(b);N_SPINS(a),P_SPINP(c),S_FLIGHT
  • Actual
    • Q(G);
    • Vars
      • K(b);N_SPINS(a),S_FLIGHT::QAB1(G)
      • K(b);P_SPINP(c),S_FLIGHT::B(A),XS(a)
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).