MESON Chess Problem Database

Problem Display
PID: 123416 (K2k4/P1R1R3/2pr1p2/3r4/3N4/8/2Q5/8 w - - 0 1)

Krzeli, Ratislav

Canadian Chess Chat, 1982

K2k4/P1R1R3/2pr1p2/3r4/3N4/8/2Q5/8

#2

6 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Sxe6#
  • Tries
    • 1.Rc8+?
      • 1...Kxe7
        • 2.Qh7#
      • 1...Kxc8!
    • 1.Qb3?
      • threat
        • 2.Qb8#
      • 1...Rb5
        • 2.Qg8#
      • 1...Rd7!
    • 1.Qg6?
      • threat
        • 2.Qe8#
        • 2.Qg8#
      • 1...Rg5
        • 2.Qe8#
      • 1...Rd7!
    • 1.Qh7?
      • threat
        • 2.Qg8#
        • 2.Qh8#
      • 1...Rd7
        • 2.Se6#
      • 1...Rh5
        • 2.Qg8#
      • 1...Rg5!
    • 1.Qxc6?
      • threat
        • 2.Re8#
        • 2.Qe8#
      • 1...Rxc6
        • 2.Sxc6#
      • 1...Re5
        • 2.Qe8#
        • 2.Qxd6#
      • 1...Re6
        • 2.Sxe6#
        • 2.Qe8#
      • 1...Rd7!
  • Keys
    • 1.Qh2!
      • threat
        • 2.Qh8#
      • 1...Rd7
        • 2.Sxc6#
      • 1...Rg5
        • 2.Qxd6#
      • 1...Rh5
        • 2.Qxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::S(B),XR(c)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(e);S_FLIGHT,XR(E)::QAR(A)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(b),XR(D)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • R(a);OGATE::QAR(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::QAR1(A)
      • Refutation
        • R(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_GUARD::S(B)
        • R(a);::QAR(A)
      • Refutation
        • R(a);
    • Try
      • Q(A);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);XQ(A)::S(B),XR(c)
      • Refutation
        • R(c);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • R(c);N_GUARD::S(B),XP(b)
      • R(a);N_GUARD::QAR2(A),XR(c)
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).