MESON Chess Problem Database

Problem Display
PID: 244829 (k1N5/B1p5/B7/2K5/2N5/8/8/8 w - - 0 1)

Froberg, Johan Hilding Laurentius

Skakbladet, 1963

k1N5/B1p5/B7/2K5/2N5/8/8/8

#2

5 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.S4b6#
  • Tries
    • 1.Kb4?
      • 1...c6
        • 2.S4b6#
      • 1...c5+!
    • 1.Kd4?
      • 1...c6
        • 2.S4b6#
      • 1...c5+!
    • 1.Kb5?
      • 1...c5
        • 2.S4b6#
      • 1...c6+!
    • 1.Kd5?
      • 1...c5
        • 2.S4b6#
      • 1...c6+!
    • 1.Bb5?
      • threat
        • 2.Bc6#
      • 1...c6
        • 2.Bxc6#
      • 1...Kb7!
  • Keys
    • 1.Sa5!
      • 1...c6
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(a);N_GUARD::S(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(a);N_GUARD::S(A)
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);S_FLIGHT
      • Vars
        • P(a);N_GUARD::S(A)
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(a);N_GUARD::S(A)
      • Refutation
        • P(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(a);N_GUARD::S(A)
      • Refutation
        • P(a);CHECK
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • P(a);::B(C),XP(a)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(A);
    • Vars
      • P(a);::B(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).