MESON Chess Problem Database

Problem Display
PID: 175457 (8/1B1N4/4p3/6n1/1B1k2P1/1P3nP1/4K3/6bQ w - - 0 1)

Slater, George James

3rd Prize, Hampstead and Highgate Express, 1899

8/1B1N4/4p3/6n1/1B1k2P1/1P3nP1/4K3/6bQ

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qa1#
    • 1...Bh2
      • 2.Qa1#
    • 1...Be3
      • 2.Qa1#
    • 1...Se1
      • 2.Qxg1#
    • 1...Sd2
      • 2.Qxg1#
    • 1...Sh2
      • 2.Qxg1#
    • 1...Sh4
      • 2.Qxg1#
    • 1...Se5
      • 2.Qxg1#
  • Tries
    • 1.Qxf3?
      • threat
        • 2.Bc3#
        • 2.Bc5#
        • 2.Qc3#
        • 2.Qd3#
      • 1...Be3
        • 2.Qxe3#
      • 1...Se4
        • 2.Qxe4#
        • 2.Qd3#
      • 1...Sxf3!
    • 1.Qh8+?
      • 1...Se5
        • 2.Qxe5#
      • 1...e5!
  • Keys
    • 1.Se5!
      • 1...Kxe5
        • 2.Qh8#
      • 1...Sxe5
        • 2.Qxg1#
      • 1...Bf2
        • 2.Qa1#
      • 1...Bh2
        • 2.Qa1#
      • 1...Be3
        • 2.Qa1#
      • 1...Se1
        • 2.Sc6#
      • 1...Sd2
        • 2.Sc6#
      • 1...Sh2
        • 2.Sc6#
      • 1...Sh4
        • 2.Sc6#
      • 1...Sh3
        • 2.Sxf3#
      • 1...Se4
        • 2.Sxf3#
      • 1...Sf7
        • 2.Sxf3#
      • 1...Sh7
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE::QAB(A)
    • S(b);N_GUARD::QAB(A),XB(a)
  • Tries
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(4)
      • Vars
        • B(a);N_GUARD::QAB1(A),XB(a)
      • Refutation
        • S(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(A),XS(b)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • S(H);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(H)::QAB(A)
      • S(b);N_GUARD,SBLOCK,XS(H)::QAB(A),XB(a)
      • B(a);OGATE::QAB(A)
      • S(b);::S(H)
      • S(d);N_GUARD::S(H),XS(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).