MESON Chess Problem Database

Problem Display
PID: 287291 (b7/1B2p3/4N1KP/bn3N2/rR2qBp1/5kp1/p1R5/7n w - - 0 1)

Hoffmann, Fritz

Mat, 1987

b7/1B2p3/4N1KP/bn3N2/rR2qBp1/5kp1/p1R5/7n

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Sh4#
      • 2.Sg5#
    • 1...Qc6
      • 2.Sh4#
    • 1...Qxb7
      • 2.Sh4#
      • 2.Sg5#
  • Tries
    • 1.Bc1?
      • threat
        • 2.Sg5#
      • 1...Qc6
        • 2.Sh4#
      • 1...Sf2!
    • 1.Rxe4?
      • threat
        • 2.Sh4#
        • 2.Sg5#
        • 2.Re3#
      • 1...Rxe4
        • 2.Sh4#
      • 1...Bxb7
        • 2.Sg5#
        • 2.Re3#
      • 1...Sf2
        • 2.Sh4#
        • 2.Re3#
      • 1...Bd2!
  • Keys
    • 1.Kh5!
      • threat
        • 2.Sh4#
      • 1...Qd5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(f);N_PINS(D),P_PINS(E)::S(D)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • Q(f);N_PINS(D),P_PINS(E)::S(D)
      • Refutation
        • S(a);
    • Try
      • R(B);N_SPINS(D),XQ(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(e);P_SPINR(e),XR(B)::S(D)
      • Refutation
        • B(h);
  • Actual
    • K(F);N_SPINS(D),S_FLIGHT
    • Threat
      • S(D)
    • Vars
      • Q(f);P_PINS(D)::S(E)
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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).