MESON Chess Problem Database

Problem Display
PID: 266066 (8/B2R1Pq1/2KNP1p1/1PN3P1/3k1p2/8/3P4/3B4 w - - 0 1)

Fedyakov, Sergey

64 Shakhmatnoe obozrenie, 1987

8/B2R1Pq1/2KNP1p1/1PN3P1/3k1p2/8/3P4/3B4

#2

11 + 4

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Sde4+?
      • 1...Ke5
        • 2.Rd5#
      • 1...Kc4!
    • 1.Sf5+?
      • 1...Ke5
        • 2.Rd5#
      • 1...Kc4!
    • 1.Sdb7+?
      • 1...Ke5
        • 2.Rd5#
      • 1...Kc4!
    • 1.Sc8+?
      • 1...Ke5
        • 2.Rd5#
      • 1...Kc4!
    • 1.Se8+?
      • 1...Ke5
        • 2.Rd5#
      • 1...Kc4!
    • 1.Be2?
      • threat
        • 2.Sd3#
        • 2.Sc4#
      • 1...Qxf7
        • 2.Sd3#
        • 2.Sxf7#
      • 1...Qe5
        • 2.Sb3#
        • 2.Sf5#
      • 1...Qf8
        • 2.Sd3#
      • 1...Ke5!
    • 1.Bb3?
      • threat
        • 2.Sc4#
      • 1...Ke5
        • 2.Sd3#
      • 1...Qxf7
        • 2.Sxf7#
      • 1...Qe5
        • 2.Sf5#
      • 1...Qf8!
  • Keys
    • 1.Bc2!
      • threat
        • 2.Sd3#
      • 1...Ke5
        • 2.Sc4#
      • 1...Qe5
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(J)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(J)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(J)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(J)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(a);N_GUARD,S_FLIGHT::R1(J)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(d);::B(I)+S(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • R(J)+S(G)
      • Vars
        • K(a);N_GUARD,S_FLIGHT::S(D)
        • Q(d);XP(K)::R(J)+S(G),XQ(d)
        • Q(d);SBLOCK::R(J)+S(G),DCHECK
      • Refutation
        • Q(d);
  • Actual
    • B(A);
    • Threat
      • B(I)+S(D)
    • Vars
      • K(a);N_GUARD,S_FLIGHT::S(G)
      • Q(d);SBLOCK::B(I)+S(D),DCHECK
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).