MESON Chess Problem Database

Problem Display
PID: 214770 (8/3qr3/b1p5/5n2/6R1/2N1kB2/R7/Kn1Q4 w - - 0 1)

Anonymous

Detroit Free Press, 1878

8/3qr3/b1p5/5n2/6R1/2N1kB2/R7/Kn1Q4

#2

6 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rxe4#
    • 1...Rf7
      • 2.Re4#
    • 1...Rg7
      • 2.Re4#
    • 1...Rh7
      • 2.Re4#
    • 1...Be2
      • 2.Qxe2#
    • 1...Bb7
      • 2.Qe2#
    • 1...Bc8
      • 2.Qe2#
  • Tries
    • 1.Re2+?
      • 1...Bxe2
        • 2.Qxe2#
      • 1...Kxf3!
  • Keys
    • 1.Be2!
      • threat
        • 2.Qg1#
      • 1...Kf2
        • 2.Qg1#
      • 1...Qxd1
        • 2.Sxd1#
      • 1...Bxe2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(g);N_GUARD::R1(F),XR(g)
    • R(g);N_GUARD::R1(F)
    • B(d);N_GUARD::QAR1(B),XB(d)
    • B(d);N_GUARD::QAR1(B)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • B(d);OGATE,XR(C)::QAR1(B),XB(d)
      • Refutation
        • K(b);P-FLIGHT,XB(E)
  • Actual
    • B(E);
    • Threat
      • QAB(B)
    • Vars
      • K(b);S_FLIGHT::QAB1(B)
      • Q(f);XQ(B)::S(D),XQ(f)
      • B(d);OGATE,XB(E)::QAR1(B),XB(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).