MESON Chess Problem Database

Problem Display
PID: 214531 (2Q5/8/1N1p1pb1/3Rp1r1/1n2k3/4p1p1/4N1K1/8 w - - 0 1)

Gold, Samuel

Baltimore American and Commercial Advertiser, 1880

2Q5/8/1N1p1pb1/3Rp1r1/1n2k3/4p1p1/4N1K1/8

#2

5 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rg4
      • 2.Qxg4#
    • 1...Rf5
      • 2.Qc4#
    • 1...Rh5
      • 2.Qg4#
    • 1...Bf5
      • 2.Qc4#
    • 1...Sa2
      • 2.Qc2#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sxd5
      • 2.Qc2#
    • 1...Sa6
      • 2.Qc2#
    • 1...f5
      • 2.Qc4#
  • Tries
    • 1.Sa4?
      • threat
        • 2.Sac3#
      • 1...Kxd5
        • 2.Sac3#
      • 1...Sxd5
        • 2.Qc2#
      • 1...Sa2!
    • 1.Qc2+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sxc2!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sxf6#
      • 1...Kxd5
        • 2.Sxf6#
      • 1...Kf5
        • 2.Sc5#
      • 1...Sxd5
        • 2.Qc2#
      • 1...Rf5
        • 2.Qc4#
      • 1...f5
        • 2.Sf6#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(f);N_GUARD::QAR2(E),XR(f)
    • R(f);SBLOCK::QAR2(E)
    • R(f);N_GUARD::QAR2(E)
    • B(i);SBLOCK::QAR2(E)
    • S(c);N_GUARD::QAB(E)
    • S(c);N_GUARD::QAB(E),XS(c)
    • S(c);N_GUARD,XR(C)::QAB(E)
    • P(h);SBLOCK::QAR2(E)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(D)
      • Vars
        • K(d);S_FLIGHT,XR(C)::S(D)
        • S(c);N_GUARD,SBLOCK,XR(C)::QAB(E)
      • Refutation
        • S(c);
    • Try
      • Q(E);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(E),XS(c)
      • Refutation
        • S(c);XQ(E)
  • Actual
    • S(D);
    • Threat
      • S(D),XP(h)
    • Vars
      • K(d);S_FLIGHT,XR(C)::S(D),XP(h)
      • K(d);P_SPINP(e),S_FLIGHT::QAB(E)+S(D)
      • S(c);N_GUARD,SBLOCK,XR(C)::QAB(E)
      • R(f);SBLOCK::QAR2(E)
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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).