MESON Chess Problem Database

Problem Display
PID: 214803 (3R1B2/K7/3n2P1/3k1bNQ/P3nP2/1P6/N3R1r1/7B w - - 0 1)

Koerper, Rudolph

St. Louis Globe Democrat, 1877

3R1B2/K7/3n2P1/3k1bNQ/P3nP2/1P6/N3R1r1/7B

#2

12 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rxd6#
  • Tries
    • 1.Rxd6+?
      • 1...Kc5
        • 2.Sxe4#
        • 2.Se6#
      • 1...Sxd6!
  • Keys
    • 1.Se6!
      • 1...Kc6
        • 2.Sb4#
      • 1...Kxe6
        • 2.Rxd6#
      • 1...Rxe2
        • 2.Rxd6#
      • 1...Rxg6
        • 2.Rxd6#
      • 1...Rg1
        • 2.Rxd6#
      • 1...Rf2
        • 2.Rxd6#
      • 1...Rh2
        • 2.Rxd6#
      • 1...Rg3
        • 2.Rxd6#
      • 1...Rg4
        • 2.Rxd6#
      • 1...Rg5
        • 2.Rxd6#
      • 1...Sd2
        • 2.Sb4#
        • 2.Rxd6#
      • 1...Sf2
        • 2.Sb4#
        • 2.Rxd6#
      • 1...Sc3
        • 2.Sb4#
        • 2.Rxd6#
      • 1...Sg3
        • 2.Sb4#
        • 2.Rxd6#
      • 1...Sc5
        • 2.Sb4#
        • 2.Rxd6#
      • 1...Sg5
        • 2.Sb4#
        • 2.Rxd6#
      • 1...Sf6
        • 2.Sb4#
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD,P_SPINR(a),SBLOCK::R1(K),XS(e)
  • Tries
    • Try
      • R(K);CHECK,XS(e)
      • Refutation
        • S(b);P_SPINR(a),XR(K)
  • Actual
    • S(G);P_PINB(d)
    • Vars
      • K(c);N_SPINB(d),N_SPINS(e),S_FLIGHT::S(B)
      • K(c);N_SPINB(d),N_SPINS(e),P_SPINS(b),S_FLIGHT,XS(G)::R1(K),XS(e)
      • R(a);N_SPINS(e),P_SPINS(b),XR(C)::R1(K),XS(e)
      • R(a);N_SPINS(e),P_SPINS(b),XP(I)::R1(K),XS(e)
      • R(a);N_SPINS(e),P_SPINS(b)::R1(K),XS(e)
      • R(a);N_SPINB(d),N_SPINS(e),P_SPINS(b)::R1(K),XS(e)
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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).