MESON Chess Problem Database

Problem Display
PID: 256980 (3B3K/1B2RpN1/1n1kNn1Q/r5R1/1P2P3/8/4b3/q4r2 w - - 0 1)

Petite, Efren

Schakend Nederland, 1963

3B3K/1B2RpN1/1n1kNn1Q/r5R1/1P2P3/8/4b3/q4r2

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.bxc5#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Se8#
      • 1...Bb5
        • 2.e5#
      • 1...Qa4!
    • 1.Sc5?
      • threat
        • 2.Se8#
      • 1...Qa4
        • 2.e5#
      • 1...Bb5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Se8#
      • 1...Qa4
        • 2.Qxf6#
      • 1...Bb5
        • 2.Sf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(d);OGATE::P(A),XR(d)
  • Tries
    • Try
      • S(D);P_PINS(g)
      • Threat
        • S(H)
      • Vars
        • B(c);S_CUTR(d)::P(B)
      • Refutation
        • Q(a);
    • Try
      • S(D);P_PINS(g)
      • Threat
        • S(H)
      • Vars
        • Q(a);N_GUARD::P(B)
      • Refutation
        • B(c);
  • Actual
    • S(D);P_PINS(g)
    • Threat
      • S(H)
    • Vars
      • Q(a);N_GUARD::QAR2(E),XS(g)
      • B(c);S_CUTR(d)::S(H)
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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).