MESON Chess Problem Database

Problem Display
PID: 46166 (8/1Q6/8/3R4/b1k5/8/1P6/K7 w - - 0 1)

Lipton, Michael

The Problemist, 2002

8/1Q6/8/3R4/b1k5/8/1P6/K7

#2

4 + 2

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qb5#
    • 1...Bc2
      • 2.Qb5#
    • 1...Bb3
      • 2.Qb5#
    • 1...Bb5
      • 2.Qxb5#
  • Tries
    • 1.Qc6+?
      • 1...Kb3
        • 2.Qc3#
      • 1...Kb4
        • 2.Qc3#
      • 1...Bxc6!
    • 1.Qb6?
      • threat
        • 2.Rd4#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Kxd5!
  • Keys
    • 1.Ka2!
      • 1...Bb3+
        • 2.Qxb3#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Bc6
        • 2.Qb3#
      • 1...Bd1
        • 2.Qb5#
      • 1...Bc2
        • 2.Qb5#
      • 1...Bd7
        • 2.Qb3#
      • 1...Be8
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(D)
    • B(a);N_GUARD::QAB1(D),XB(a)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(D)
        • K(b);OGATE,P-FLIGHT::QAB1(D)
      • Refutation
        • B(a);XQ(D)
    • Try
      • Q(D);
      • Threat
        • R1(C)
      • Vars
        • B(a);N_GUARD::QAB1(D),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • B(a);CHECK,N_GUARD::QAB1(D),XB(a)
      • B(a);N_GUARD::QAB1(D),XB(a)
      • B(a);N_GUARD::QAB1(D)
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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).