MESON Chess Problem Database

Problem Display
PID: 207054 (1K6/8/2pk4/4NB2/2Qp1B2/3n4/8/8 w - - 0 1)

Paclt, Josef

Schachzeitung, 1865

1K6/8/2pk4/4NB2/2Qp1B2/3n4/8/8

#2

5 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sxc6#
      • 2.Sg6#
    • 1...Se1
      • 2.Sxc6#
      • 2.Sg6#
    • 1...Sb2
      • 2.Sxc6#
      • 2.Sg6#
    • 1...Sf2
      • 2.Sxc6#
      • 2.Sg6#
    • 1...Sb4
      • 2.Sxc6#
      • 2.Sg6#
    • 1...Sc5
      • 2.Sg6#
    • 1...c5
      • 2.Qe6#
  • Tries
    • 1.Sxc6+?
      • 1...Se5
        • 2.Bxe5#
      • 1...Sxf4!
    • 1.Sg6+?
      • 1...Se5
        • 2.Bxe5#
        • 2.Qxd4#
      • 1...Sxf4!
    • 1.Sd7+?
      • 1...Sxf4
        • 2.Qc5#
      • 1...Se5
        • 2.Qe6#
        • 2.Qc5#
      • 1...Ke7!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Sf7#
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Qe6#
      • 1...Sxe5
        • 2.Qxd4#
      • 1...Sb4
        • 2.Sf7#
      • 1...Sf4
        • 2.Sf7#
      • 1...c5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::B(B)+S(C)
    • P(c);SBLOCK::QAR1(A)
  • Tries
    • Try
      • S(C);CHECK,XP(c)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::B(B),XS(a)
      • Refutation
        • S(a);XB(B)
    • Try
      • S(C);CHECK
      • Refutation
        • S(a);XB(B)
    • Try
      • S(C);CHECK
      • Vars
        • S(a);XB(B)::QAB1(A)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • B(B);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT,XS(C)::QAR1(A)
      • S(a);XS(C)::QAR2(A),XP(b)
      • S(a);::S(C)
      • P(c);SBLOCK::QAR1(A)
HTML5 logo

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).