MESON Chess Problem Database

Problem Display
PID: 261452 (1k6/1bR5/pB6/N7/7K/8/6B1/8 w - - 0 1)

Somma, Francesco

L'Italia Scacchistica, 1931

1k6/1bR5/pB6/N7/7K/8/6B1/8

#2

5 + 3

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ka8
      • 2.Rc8#
  • Tries
    • 1.Sxb7?
      • 1...Ka8
        • 2.Rc8#
      • 1...a5!
    • 1.Bh3?
      • 1...Bf3
        • 2.Rc8#
      • 1...Bh1
        • 2.Rc8#
      • 1...Bg2
        • 2.Rc8#
      • 1...Be4
        • 2.Rc8#
      • 1...Bd5
        • 2.Rc8#
      • 1...Bc6
        • 2.Rc8#
      • 1...Ba8
        • 2.Rc8#
      • 1...Bc8
        • 2.Rxc8#
      • 1...Ka8!
    • 1.Rxb7+?
      • 1...Kc8
        • 2.Bh3#
      • 1...Ka8!
  • Keys
    • 1.Rd7!
      • 1...Ka8
        • 2.Rd8#
      • 1...Kc8
        • 2.Rd8#
      • 1...Bxg2
        • 2.Rd8#
      • 1...Bf3
        • 2.Rd8#
      • 1...Be4
        • 2.Rd8#
      • 1...Bd5
        • 2.Rd8#
      • 1...Bc6
        • 2.Rd8#
      • 1...Ba8
        • 2.Rd8#
      • 1...Bc8
        • 2.Ba7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,P-FLIGHT,P_SPINB(b)::R(E)
  • Tries
    • Try
      • S(C);XB(b)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::R(E)
      • Refutation
        • P(a);
    • Try
      • B(A);
      • Vars
        • B(b);N_GUARD::R1(E)
        • B(b);N_GUARD,SBLOCK::R1(E)
        • B(b);N_GUARD::R1(E),XB(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(E);CHECK,XB(b)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::B(A)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • R(E);
    • Vars
      • K(c);P-FLIGHT,P_SPINB(b)::R(E)
      • K(c);P-FLIGHT,S_CUTB(b)::R1(E)
      • B(b);N_GUARD,XB(A)::R(E)
      • B(b);N_GUARD::R(E)
      • B(b);SBLOCK::B(D)
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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).