MESON Chess Problem Database

Problem Display
PID: 261022 (1B6/1R3n1K/P1k1N1Np/P2r2r1/3p4/8/2q1P3/1bR2B1Q w - - 0 1)

Handloser, Ralf Chris

4th HM., Neue Zurcher Zeitung, 2014

1B6/1R3n1K/P1k1N1Np/P2r2r1/3p4/8/2q1P3/1bR2B1Q

#2

11 + 8

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Rxc4#
    • 1...Qc5
      • 2.Sxd4#
      • 2.Rxc5#
    • 1...Rf5
      • 2.Se7#
    • 1...d3
      • 2.Se7#
  • Tries
    • 1.e3?
      • threat
        • 2.Bb5#
      • 1...Qc4
        • 2.Rxc4#
      • 1...Sd6
        • 2.Rc7#
      • 1...d3
        • 2.Se7#
      • 1...Rg2!
  • Keys
    • 1.e4!
      • threat
        • 2.Se7#
      • 1...Rxg6
        • 2.exd5#
      • 1...dxe4 ep
        • 2.Bb5#
      • 1...Rd7
        • 2.Rb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(b);OGATE::R(A),XQ(b)
    • R(e);N_PINS(H)::S(H)
    • P(c);N_PINS(H)::S(H)
  • Tries
    • Try
      • P(D);
      • Threat
        • B(B)
      • Vars
        • Q(b);OGATE::R(A),XQ(b)
        • S(h);SBLOCK::R1(I)
        • P(c);N_PINS(H)::S(H)
      • Refutation
        • R(e);N_SPINR(d)
  • Actual
    • P(D);N_PINR(d),N_SPINS(H)
    • Threat
      • S(H)
    • Vars
      • R(e);N_GUARD,XS(H)::P(D),XR(d)
      • P(c);EP,P_PINS(H),P_SPINR(d),XP(D)::B(B)
      • R(d);SBLOCK::R1(I)
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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).