MESON Chess Problem Database

Problem Display
PID: 51078 (8/1K1p4/3R4/1pNnp1B1/1p1k1p2/2np4/1N1PP3/2Q2b2 w - - 0 1)

Downer, GR

Burnley Express, 1880

8/1K1p4/3R4/1pNnp1B1/1p1k1p2/2np4/1N1PP3/2Q2b2

#2

8 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe2
      • 2.Qg1#
    • 1...Bg2
      • 2.Qg1#
    • 1...Bh3
      • 2.Qg1#
    • 1...Se4
      • 2.Sb3#
    • 1...b3
      • 2.Qxc3#
    • 1...f3
      • 2.Be3#
  • Tries
    • 1.e3+?
      • 1...fxe3
        • 2.Bxe3#
      • 1...Kxc5!
  • Keys
    • 1.e4!
      • 1...Kxc5
        • 2.Rxd5#
      • 1...Sxe4
        • 2.Sb3#
      • 1...fxe4 ep
        • 2.Bxe3#
      • 1...Be2
        • 2.Qg1#
      • 1...Bg2
        • 2.Qg1#
      • 1...Bh3
        • 2.Qg1#
      • 1...Sb1
        • 2.Rxd5#
      • 1...Sd1
        • 2.Rxd5#
      • 1...Sa2
        • 2.Rxd5#
      • 1...Se2
        • 2.Rxd5#
      • 1...Sa4
        • 2.Rxd5#
      • 1...b3
        • 2.Qxc3#
      • 1...f3
        • 2.Be3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE,XP(D)::QAB(A)
    • B(a);OGATE::QAB(A)
    • S(b);SBLOCK::S(E)
    • P(d);N_GUARD::QAB1(A),XS(b)
    • P(f);OGATE::B(F)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • P(f);OGATE,XP(D)::B(F),XP(f)
      • Refutation
        • K(e);N_SPINS(h),P_SPINS(b),S_FLIGHT,XS(E)
  • Actual
    • P(D);
    • Vars
      • K(e);N_SPINS(h),P_SPINS(b),S_FLIGHT,XS(E)::R1(G),XS(h)
      • S(b);SBLOCK,XP(D)::S(E)
      • P(f);EP,OGATE,XP(D)::B(F),XP(f)
      • B(a);OGATE::QAB(A)
      • S(b);N_GUARD::R1(G),XS(h)
      • P(d);N_GUARD::QAB1(A),XS(b)
      • P(f);OGATE::B(F)
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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).