MESON Chess Problem Database

Problem Display
PID: 17122 (8/p7/1p1B1N2/1P6/2B5/4kpP1/Q7/1Nb4K w - - 0 1)

Laws, Benjamin Glover

2nd Prize, Jamaica Gleaner, 1884

8/p7/1p1B1N2/1P6/2B5/4kpP1/Q7/1Nb4K

#2

8 + 5

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qxd2#
    • 1...Ba3
      • 2.Qd2#
  • Tries
    • 1.Qb3+?
      • 1...Kd4
        • 2.Qc3#
        • 2.Qd3#
      • 1...Kf2!
    • 1.Qb2?
      • threat
        • 2.Bf4#
      • 1...Bd2
        • 2.Qxd2#
      • 1...f2
        • 2.Qc3#
      • 1...Bxb2!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Qd3#
        • 2.Qe4#
      • 1...fxe2!
  • Keys
    • 1.Qa5!
      • 1...Kf2
        • 2.Sg4#
      • 1...Kd4
        • 2.Qc3#
      • 1...bxa5
        • 2.Bc5#
      • 1...Bb2
        • 2.Qd2#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Ba3
        • 2.Qd2#
      • 1...f2
        • 2.Qc3#
      • 1...a6
        • 2.Qxb6#

This is a version of 4648

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAB1(C),XB(a)
    • B(a);N_GUARD::QAB1(C)
  • Tries
    • Try
      • Q(C);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);
      • Threat
        • B(G)
      • Vars
        • B(a);N_GUARD::QAB1(C),XB(a)
        • P(c);SBLOCK::QAR2(C)
      • Refutation
        • B(a);XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • P(c);XQ(C)
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::S(H)
      • K(b);S_FLIGHT::QAB1(C)
      • P(d);N_GUARD,XQ(C)::B(G)
      • B(a);N_GUARD::QAB1(C)
      • B(a);N_GUARD::QAB1(C),XB(a)
      • P(c);SBLOCK::QAR2(C)
      • P(e);N_GUARD::QAB(C),XP(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).