MESON Chess Problem Database

Problem Display
PID: 48724 (3K4/b1pN4/B1p2pp1/2r3r1/R2PkB2/6p1/3QN1P1/8 w - - 0 1)

Strerath, Otto

Schach-Express, 1949

3K4/b1pN4/B1p2pp1/2r3r1/R2PkB2/6p1/3QN1P1/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rcd5
      • 2.Bd3#
      • 2.Qc2#
      • 2.Qd3#
    • 1...Rcf5
      • 2.Sc3#
    • 1...Rgd5
      • 2.Sxg3#
      • 2.Bd3#
      • 2.Qd3#
    • 1...Rgf5
      • 2.dxc5#
    • 1...f5
      • 2.Sf6#
      • 2.dxc5#
  • Tries
    • 1.Qe3+?
      • 1...Kd5
        • 2.Sxf6#
      • 1...Kf5!
  • Keys
    • 1.Bc8!
      • threat
        • 2.Sxf6#
      • 1...Kd5
        • 2.Sxf6#
      • 1...Kf5
        • 2.Sxc5#
      • 1...Rcd5
        • 2.Qc2#
      • 1...Rcf5
        • 2.Sc3#
      • 1...Rgd5
        • 2.Sxg3#
      • 1...Rgf5
        • 2.dxc5#
      • 1...f5
        • 2.Sf6#
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,SBLOCK::S(B)
    • R(d);SBLOCK::R(D)+P(E),XR(c)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(H),XP(f)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(G);
    • Threat
      • S(H),XP(f)
    • Vars
      • K(b);S_FLIGHT::S(H),XP(f)
      • K(b);S_FLIGHT::B(G)+S(H),XR(c)
      • R(c);N_GUARD,P_PINS(H),SBLOCK::QAB(A)
      • R(c);N_GUARD,SBLOCK::S(B)
      • R(d);N_GUARD,P_PINS(H),SBLOCK::S(B),XP(a)
      • R(d);SBLOCK::R(D)+P(E),XR(c)
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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).