Problem Display
PID: 109818 (8/N2p4/5P2/2pk1P2/2R4R/5KQ1/1n6/8 w - - 0 1)

Tattersall, Creassey Edward Cecil

The Times, 1897

8/N2p4/5P2/2pk1P2/2R4R/5KQ1/1n6/8

#2

7 + 4


15 British Chess Magazine 1904
6490 yacpdb 2009

SOLUTION


  • SOUND
  • Tries
    • 1.Sc8?
      • threat
        • 2.Se7#
        • 2.Qd6#
      • 1...Sxc4
        • 2.Se7#
      • 1...d6
        • 2.Se7#
        • 2.Qxd6#
      • 1...Kc6!
  • Keys
    • 1.Kf4!
      • 1...Sd3+
        • 2.Qxd3#
      • 1...Kxc4
        • 2.Ke5#
      • 1...Kd6
        • 2.Ke4#
      • 1...Sxc4
        • 2.Qd3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#
      • 1...d6
        • 2.Qg8#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XR(C)::S(G)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • S(a);CHECK,N_GUARD::QAR2(B),XS(a)
      • K(c);S_FLIGHT,XR(C)::R(D)+K(A)
      • K(c);P-FLIGHT::QAB(B)+K(A)
      • S(a);N_GUARD,XR(C)::QAR2(B)
      • S(a);N_GUARD::QAR2(B)
      • P(d);SBLOCK::QAB(B)


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).