MESON Chess Problem Database

Problem Display
PID: 93793 (8/1K6/5p2/1pNk1P1b/pnR5/6Q1/4n3/6B1 w - - 0 1)

Karel, Jan

Ceske listy sachove, 1899

8/1K6/5p2/1pNk1P1b/pnR5/6Q1/4n3/6B1

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rd4+?
      • 1...Kxc5
        • 2.Qd6#
      • 1...Sxd4!
    • 1.Qd3+?
      • 1...Ke5
        • 2.Sd7#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sxd3!
    • 1.Qg8+?
      • 1...Ke5
        • 2.Qe6#
      • 1...Kd6
        • 2.Qe6#
      • 1...Bf7!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.Sb6#
      • 1...Sxg3
        • 2.Rd4#
      • 1...bxc4
        • 2.Sxf6#
      • 1...Sd4
        • 2.Rxd4#
      • 1...Sf4
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(e);P-FLIGHT,XS(D)::QAB1(B)
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(D)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(B),XS(a)
      • Refutation
        • S(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(B)
      • Refutation
        • B(f);P_SPINB(f)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • K(e);S_FLIGHT,XR(C)::S(D)
      • S(a);N_GUARD,XQ(B)::R1(C)
      • P(d);SBLOCK,XR(C)::S(D),XP(g)
      • S(a);N_GUARD::R1(C),XS(a)
      • S(a);N_GUARD::R1(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).