MESON Chess Problem Database

Problem Display
PID: 214910 (3N4/Q7/2P5/npP5/1k1K4/3R4/1pB5/8 w - - 0 1)

Barbe, Emanuel

St. Louis Globe Democrat, 1879

3N4/Q7/2P5/npP5/1k1K4/3R4/1pB5/8

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3+
      • 2.Rxb3#
    • 1...Sc4
      • 2.Rb3#
    • 1...Sxc6+
      • 2.Sxc6#
    • 1...Sb7
      • 2.Rb3#
      • 2.Qa3#
  • Tries
    • 1.Sb7?
      • threat
        • 2.Qxa5#
      • 1...Sb3+
        • 2.Rxb3#
      • 1...Sxb7
        • 2.Rb3#
        • 2.Qa3#
      • 1...Sc4
        • 2.Rb3#
      • 1...Sxc6+!
  • Keys
    • 1.Ra3!
      • threat
        • 2.Qxa5#
      • 1...Sb3+
        • 2.Rxb3#
      • 1...Sxc6+
        • 2.Sxc6#
      • 1...Kxa3
        • 2.Qxa5#
      • 1...Sc4
        • 2.Rb3#
      • 1...Sb7
        • 2.Rb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);CHECK,N_GUARD::R1(B),XS(c)
    • S(c);N_GUARD::R1(B)
    • S(c);CHECK,XP(E)::S(G),XS(c)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB1(F),XS(c)
      • Vars
        • S(c);CHECK,N_GUARD::R1(B),XS(c)
        • S(c);N_GUARD::R1(B)
      • Refutation
        • S(c);CHECK,XP(E)
  • Actual
    • R(B);
    • Threat
      • QAB1(F),XS(c)
    • Vars
      • S(c);CHECK,N_GUARD::R1(B),XS(c)
      • S(c);CHECK,XP(E)::S(G),XS(c)
      • K(b);P_SPINS(c),S_FLIGHT,XR(B)::QAR2(F),XS(c)
      • S(c);N_GUARD::R1(B)
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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).