Problem Display
PID: 48685 (8/1n3NQ1/K1p1b1rb/1pk3p1/2ppPN2/P5B1/B2r4/8 w - - 0 1)

Wright, Stanley

Chess Chips, 1878

8/1n3NQ1/K1p1b1rb/1pk3p1/2ppPN2/P5B1/B2r4/8

#2

8 + 11


SOLUTION


  • SOUND
  • Sets
    • 1...Rxg7
      • 2.Sxe6#
    • 1...Bh3
      • 2.Qe5#
    • 1...Bg4
      • 2.Qe5#
    • 1...Bf5
      • 2.Qe5#
    • 1...Bd7
      • 2.Qe5#
    • 1...Bc8
      • 2.Qe5#
  • Tries
    • 1.Qf8+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Bxf8!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Sxb7#
      • 1...Kd6
        • 2.Sd3#
        • 2.Sfxe6#
        • 2.Sxb7#
      • 1...Rxg7
        • 2.Sfxe6#
      • 1...Sxd8
        • 2.Qe7#
      • 1...Bc8
        • 2.Qe5#
      • 1...Sa5
        • 2.Qe7#
      • 1...Sd6
        • 2.Qa7#

There are these versions: 121132

FEATURES


  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(i);N_GUARD,XQ(H)::S(E),XB(h)
    • B(h);N_GUARD::QAR2(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::QAB1(H),XS(k)
      • Refutation
        • B(j);XQ(H)
  • Actual
    • S(G);
    • Threat
      • S(G),XS(k)
    • Vars
      • R(i);N_GUARD,XQ(H)::S(E),XB(h)
      • S(k);N_GUARD,XS(G)::QAB(H)
      • B(h);N_GUARD::QAR2(H)
      • S(k);N_GUARD::QAB(H)
      • S(k);OGATE,SBLOCK::QAB(H)


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).