MESON Chess Problem Database

Problem Display
PID: 1008 (8/1p6/RN6/7q/N2n2R1/pk1B1p2/1r2p2p/Q3B2K w - - 0 1)

Petite, Efren

The Problemist Supplement, 1996

8/1p6/RN6/7q/N2n2R1/pk1B1p2/1r2p2p/Q3B2K

#2

8 + 9

5454 Near Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.Sc5#
    • 1...Qg6
      • 2.Sc5#
    • 1...Qf7
      • 2.Sc5#
    • 1...Qe8
      • 2.Sc5#
    • 1...Qh3
      • 2.Sc5#
    • 1...Qh4
      • 2.Sc5#
    • 1...Qc5
      • 2.Sxc5#
    • 1...Qh6
      • 2.Sc5#
    • 1...Qh7
      • 2.Sc5#
    • 1...Qh8
      • 2.Sc5#
    • 1...Rb1
      • 2.Qxb1#
    • 1...Ra2
      • 2.Qc3#
    • 1...Sc2
      • 2.Bc4#
    • 1...Sb5
      • 2.Rb4#
    • 1...Sf5
      • 2.Sc5#
      • 2.Rb4#
    • 1...Se6
      • 2.Rb4#
    • 1...a2
      • 2.Qxb2#
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qxa3#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Ra2
        • 2.Qc3#
      • 1...Sc2
        • 2.Sd2#
      • 1...Sb5
        • 2.Sa5#
      • 1...a2
        • 2.Qxb2#

Anticipated by 135752(1964)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 11
  • Sets
    • Q(h);N_GUARD,XR(F)::S(E)
    • Q(h);N_GUARD::S(E)
    • Q(h);N_GUARD::S(E),XQ(h)
    • R(a);OGATEB,P_PINB(B)::QAR2(A),XR(a)
    • R(a);OGATE,SBLOCK::QAR1(A)
    • S(g);SBLOCK::B(D)
    • S(g);OGATE::R1(F)
    • P(d);N_GUARD::QAR1(A),XR(a)
  • Actual
    • S(H);
    • Threat
      • QAR1(A),XP(d)
    • Vars
      • Q(h);N_GUARD::S(E),XQ(h)
      • R(a);OGATE,SBLOCK::QAR1(A)
      • S(g);S_CUTR(a)::S(H)
      • S(g);S_CUTQ(h)::S(H)
      • P(d);N_GUARD::QAR1(A),XR(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).