MESON Chess Problem Database

Problem Display
PID: 63999 (8/4K3/b3n1p1/Qn2kr1R/R3BpP1/4P3/3P4/8 w - - 0 1)

Roels, C

Chess, 1946

8/4K3/b3n1p1/Qn2kr1R/R3BpP1/4P3/3P4/8

#2

8 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Bb7?
      • threat
        • 2.Re4#
      • 1...Sd4
        • 2.exd4#
      • 1...Sc5
        • 2.exf4#
      • 1...Sg5
        • 2.d4#
      • 1...Bxb7!
    • 1.Ba8?
      • threat
        • 2.Re4#
      • 1...Sd4
        • 2.exd4#
      • 1...Sc5
        • 2.exf4#
      • 1...Sg5
        • 2.d4#
      • 1...Bb7!
    • 1.Qxb5+?
      • 1...Sc5
        • 2.Qb2#
        • 2.Qxc5#
        • 2.Qb8#
      • 1...Bxb5!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Re4#
      • 1...Sd4
        • 2.exd4#
      • 1...Sc5
        • 2.exf4#
      • 1...Sg5
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(D);
      • Threat
        • R1(C)
      • Vars
        • S(f);OGATE::P(B),XS(f)
        • S(f);N_GUARD,N_SPINS(b)::P(B),XP(a)
        • S(f);N_GUARD,N_SPINR(d)::P(A)
      • Refutation
        • B(e);XB(D)
    • Try
      • B(D);
      • Threat
        • R1(C)
      • Vars
        • S(f);OGATE::P(B),XS(f)
        • S(f);N_GUARD,N_SPINS(b)::P(B),XP(a)
        • S(f);N_GUARD,N_SPINR(d)::P(A)
      • Refutation
        • B(e);
    • Try
      • Q(F);CHECK,XS(b)
      • Refutation
        • B(e);XQ(F)
  • Actual
    • B(D);
    • Threat
      • R1(C)
    • Vars
      • S(f);OGATE::P(B),XS(f)
      • S(f);N_GUARD,N_SPINS(b)::P(B),XP(a)
      • S(f);N_GUARD,N_SPINR(d)::P(A)
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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).