MESON Chess Problem Database

Problem Display
PID: 23095 (8/8/8/8/2N5/6Q1/1b2p3/1K1k4 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/8/2N5/6Q1/1b2p3/1K1k4

#2

3 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...e1B
      • 2.Qf3#
      • 2.Qg4#
    • 1...e1R
      • 2.Qd3#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Sxb2#
        • 2.Se3#
        • 2.Qd2#
      • 1...e1Q
        • 2.Qc2#
      • 1...e1S
        • 2.Qd2#
      • 1...e1B
        • 2.Qc2#
        • 2.Qf3#
      • 1...e1R
        • 2.Qd2#
        • 2.Qc2#
        • 2.Qd3#
      • 1...Ba1
        • 2.Se3#
        • 2.Qd2#
        • 2.Qc1#
      • 1...Bc1
        • 2.Qxc1#
      • 1...Ba3
        • 2.Se3#
        • 2.Qd2#
      • 1...Bxc3!
    • 1.Qg5?
      • threat
        • 2.Qd2#
      • 1...Ke1
        • 2.Qg1#
      • 1...e1B
        • 2.Qg4#
        • 2.Qh5#
      • 1...Bc1
        • 2.Qxc1#
      • 1...Bc3
        • 2.Qc1#
      • 1...e1Q!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qd2#
      • 1...Ke1
        • 2.Qg1#
      • 1...e1Q
        • 2.Sxb2#
      • 1...e1B
        • 2.Sxb2#
        • 2.Qf3#
      • 1...Bc1
        • 2.Qxc1#
      • 1...Bc3
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(c);SBLOCK::QAR2(B)
  • Tries
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • P(c);SBLOCK::QAB1(B)
        • P(c);::QAR1(B)
        • B(b);N_GUARD::QAR1(B),XB(b)
      • Refutation
        • B(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
        • B(b);N_GUARD::QAR1(B),XB(b)
        • B(b);N_GUARD::QAR1(B)
      • Refutation
        • P(c);
  • Actual
    • Q(B);
    • Threat
      • QAR1(B)
    • Vars
      • K(a);P-FLIGHT,P_SPINP(c)::QAR2(B)
      • P(c);::S(C),XB(b)
      • B(b);N_GUARD::QAR1(B),XB(b)
      • B(b);N_GUARD::QAR1(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).