MESON Chess Problem Database

Problem Display
PID: 180836 (2K2b2/1n3Pp1/3k2P1/1p1PN3/1R6/B7/8/3R1Q2 w - - 0 1)

Petite, Efren

Problem Observer, 2013

2K2b2/1n3Pp1/3k2P1/1p1PN3/1R6/B7/8/3R1Q2

#2

9 + 5

5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Rxb5#
    • 1...Kxe5
      • 2.Qf4#
  • Tries
    • 1.Sc4+?
      • 1...Kc5
        • 2.Qg1#
        • 2.Qf2#
      • 1...Ke7
        • 2.Re1#
      • 1...bxc4!
    • 1.Sc6?
      • 1...Kc5
        • 2.Rxb5#
      • 1...Sa5
        • 2.Rxb5#
      • 1...Sc5
        • 2.Qf4#
      • 1...Sd8
        • 2.Rxb5#
      • 1...Be7!
    • 1.Sd7?
      • 1...Ke7
        • 2.Re4#
      • 1...Be7
        • 2.Qf4#
      • 1...Sa5
        • 2.Rxb5#
      • 1...Sd8
        • 2.Rxb5#
      • 1...Sc5!
    • 1.Qf6+?
      • 1...Kc5
        • 2.Sd7#
        • 2.Rc4#
        • 2.Qc6#
      • 1...gxf6!
  • Keys
    • 1.Qf4!
      • 1...Kc5
        • 2.Sd7#
      • 1...Ke7
        • 2.Sc6#
      • 1...Sc5
        • 2.Sc6#
      • 1...Be7
        • 2.Sd7#
      • 1...Sa5
        • 2.Rxb5#
      • 1...Sd8
        • 2.Rxb5#

Anticipated by 84955(1992)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::B(C)+R(D),DCHECK,XP(a)
    • K(b);OGATEB,S_FLIGHT,XS(F)::QAB1(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::R(A)
      • Refutation
        • P(a);XS(F)
    • Try
      • S(F);
      • Vars
        • K(b);S_FLIGHT::B(C)+R(D),DCHECK,XP(a)
        • S(c);N_GUARD::B(C)+R(D),XP(a)
        • S(c);SBLOCK::QAB(B)
      • Refutation
        • B(e);
    • Try
      • S(F);
      • Vars
        • K(b);S_FLIGHT::B(C)+R(D),DCHECK
        • B(e);SBLOCK::QAB(B)
        • S(c);N_GUARD::B(C)+R(D),XP(a)
      • Refutation
        • S(c);
    • Try
      • Q(B);CHECK
      • Refutation
        • P(d);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • S(c);SBLOCK::QAB(B)+S(F)
      • B(e);SBLOCK::QAB(B)+S(F)
      • S(c);N_GUARD::B(C)+R(D),XP(a)
HTML5 logo

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).