MESON Chess Problem Database

Problem Display
PID: 141339 (7b/2p2p2/1n2kp2/3RnN2/1N3p1P/7K/2Q5/8 w - - 0 1)

Siehenschnur, P

Der Reichsbote, 1900

7b/2p2p2/1n2kp2/3RnN2/1N3p1P/7K/2Q5/8

#2

6 + 8

5454 Near Snap 2011
14868 Pirnie Collection 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.Qc6#
    • 1...Sf3
      • 2.Qc6#
    • 1...Sg4
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sg6
      • 2.Qc6#
    • 1...Sed7
      • 2.Qc6#
    • 1...c5
      • 2.Rd6#
    • 1...c6
      • 2.Rd6#
  • Tries
    • 1.Sa6?
      • threat
        • 2.Sxc7#
      • 1...Kxd5
        • 2.Sxc7#
      • 1...Sxd5
        • 2.Sc5#
      • 1...c5
        • 2.Sc7#
        • 2.Rd6#
      • 1...c6
        • 2.Sc7#
        • 2.Rd6#
      • 1...Sa8!
    • 1.Sg7+?
      • 1...Ke7
        • 2.Qc5#
      • 1...Bxg7!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sxf4#
      • 1...Kxd5
        • 2.Sxf4#
      • 1...Kxf5
        • 2.Sc5#
      • 1...Sxd3
        • 2.Qc6#
      • 1...Sxd5
        • 2.Sc5#
      • 1...Sg6
        • 2.Qc6#
      • 1...f3
        • 2.Sf4#

Anticipated by 141340(1893)

This anticipates 120666(1901)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • S(b);N_GUARD::QAR2(A)
    • S(b);N_GUARD::QAR2(A),XS(b)
    • P(f);N_GUARD::R1(E)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C),XP(f)
      • Vars
        • K(d);S_FLIGHT,XR(E)::S(C),XP(f)
        • S(c);SBLOCK,XR(E)::S(C)
      • Refutation
        • S(c);
    • Try
      • S(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(A)
      • Refutation
        • B(h);XS(F)
  • Actual
    • S(C);
    • Threat
      • S(C),XP(a)
    • Vars
      • K(d);S_FLIGHT,XR(E)::S(C),XP(a)
      • K(d);P_SPINS(b),S_FLIGHT,XS(F)::QAB(A)+S(C)
      • S(b);N_GUARD,XS(C)::QAR2(A)
      • S(c);SBLOCK,XR(E)::S(C)
      • S(b);N_GUARD::QAR2(A)
      • P(a);::S(C)
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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).