MESON Chess Problem Database

Problem Display
PID: 39346 (8/1b6/8/8/k1P5/8/K1P5/4B2Q w - - 0 1)

Lincoln, Robert A

Magadanskaya Pravda, 1998

8/1b6/8/8/k1P5/8/K1P5/4B2Q

#2

5 + 2

2786 More Fun with Chess Miniatures 2000
56 The Problemist 2003

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Qxc6#
    • 1...Ba8
      • 2.Qxa8#
    • 1...Bc8
      • 2.Qc6#
  • Tries
    • 1.Qd5?
      • threat
        • 2.Qa5#
        • 2.Qb5#
      • 1...Ba6
        • 2.Qa5#
      • 1...Bc6
        • 2.Qxc6#
        • 2.Qa5#
      • 1...Bxd5!
    • 1.Qh5?
      • threat
        • 2.Qa5#
        • 2.Qb5#
      • 1...Ba6
        • 2.Qa5#
      • 1...Bc6
        • 2.Qa5#
      • 1...Bd5!
  • Keys
    • 1.Qh6!
      • 1...Bg2
        • 2.Qa6#
      • 1...Bh1
        • 2.Qa6#
      • 1...Bf3
        • 2.Qa6#
      • 1...Be4
        • 2.Qa6#
      • 1...Bd5
        • 2.Qa6#
      • 1...Ba6
        • 2.Qxa6#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Ba8
        • 2.Qa6#
      • 1...Bc8
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(b);N_GUARD::QAB(B),XB(b)
    • B(b);OGATE::QAR(B),XB(b)
    • B(b);N_GUARD::QAB(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR1(B)
      • Refutation
        • B(b);P_PINP(E),XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(b);::QAR1(B)
      • Refutation
        • B(b);P_PINP(E)
  • Actual
    • Q(B);
    • Vars
      • B(b);N_GUARD::QAR2(B)
      • B(b);N_GUARD,P_PINP(E)::QAR2(B)
      • B(b);N_GUARD::QAR2(B),XB(b)
      • B(b);N_GUARD::QAB(B),XB(b)
      • B(b);N_GUARD::QAB(B)
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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).