MESON Chess Problem Database

Problem Display
PID: 143754 (6N1/1p1pRQ2/1B1pP2n/1K1k1B2/1p3P2/3r4/1b4b1/8 w - - 0 1)

Lawrence, JF

British Chess Magazine, 1896

6N1/1p1pRQ2/1B1pP2n/1K1k1B2/1p3P2/3r4/1b4b1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Sf6#
    • 1...Rd4
      • 2.Sf6#
    • 1...Bc1
      • 2.Sf6#
    • 1...Ba3
      • 2.Sf6#
    • 1...Bf6
      • 2.Sxf6#
    • 1...Sg4
      • 2.exd7#
    • 1...Sxf5
      • 2.exd7#
    • 1...Sxg8
      • 2.exd7#
    • 1...dxe6
      • 2.Qxe6#
  • Tries
    • 1.Sxh6?
      • threat
        • 2.exd7#
      • 1...dxe6
        • 2.Qxe6#
      • 1...Re3!
    • 1.Rxd7?
      • threat
        • 2.Se7#
      • 1...Sxg8
        • 2.e7#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Sxf5!
  • Keys
    • 1.Re8!
      • threat
        • 2.Se7#
      • 1...Sxf5
        • 2.exd7#
      • 1...Sxg8
        • 2.exd7#
        • 2.e7#
      • 1...Bf6
        • 2.Sxf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 7
  • Sets
    • R(c);S_CUTB(a)::S(H)
    • B(a);N_GUARD::S(H)
    • B(a);N_GUARD::S(H),XB(a)
    • S(g);N_GUARD::QAB(G)+P(E),XP(i)
    • S(g);N_GUARD,XB(C)::QAB(G)+P(E),XP(i)
    • S(g);N_GUARD,XS(H)::QAB(G)+P(E),XP(i)
    • P(i);OGATE,P_SPINP(i),XP(E)::QAB1(G),XP(i)
  • Tries
    • Try
      • S(H);XS(g)
      • Threat
        • QAB(G)+P(E),XP(i)
      • Vars
        • P(i);OGATE,P_SPINP(i),XP(E)::QAB1(G),XP(i)
      • Refutation
        • R(c);
    • Try
      • R(F);P_PINP(f),XP(i)
      • Threat
        • S(H)
      • Vars
        • S(g);N_GUARD,XS(H)::QAB(G)+P(E)
        • B(a);N_GUARD::S(H),XB(a)
      • Refutation
        • S(g);XB(C)
  • Actual
    • R(F);
    • Threat
      • S(H)
    • Vars
      • S(g);N_GUARD,XB(C)::QAB(G)+P(E),XP(i)
      • B(a);N_GUARD::S(H),XB(a)
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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).