MESON Chess Problem Database

Problem Display
PID: 258730 (8/1K4p1/8/1Q1nP3/3bkPNN/3pP3/5R2/5R2 w - - 0 1)

Semenschenyuk, A

Sychov, Vladimir Petrovich

Szachy, 1979

8/1K4p1/8/1Q1nP3/3bkPNN/3pP3/5R2/5R2

#2

9 + 5

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Rxf4#
    • 1...d2
      • 2.Qb1#
  • Tries
    • 1.Qc6?
      • threat
        • 2.Qg6#
      • 1...g6
        • 2.Qxg6#
      • 1...Bxe3!
  • Keys
    • 1.Re2!
      • threat
        • 2.Sf2#
      • 1...Bxe3
        • 2.Qc4#
      • 1...Sxe3
        • 2.Qc6#
      • 1...dxe2
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(d);OGATE,XP(D)::R1(B),XS(d)
    • P(a);OGATEB::QAB(G)
  • Tries
    • Try
      • Q(G);P_PINS(d)
      • Threat
        • QAB(G)
      • Vars
        • P(e);::QAB(G),XP(e)
      • Refutation
        • B(b);XP(C)
  • Actual
    • R(B);
    • Threat
      • S(E)
    • Vars
      • B(b);OGATEB,P_SPINB(b),XP(C)::QAR2(G)
      • S(d);OGATEB,P_SPINS(d),XP(C)::QAB(G)
      • P(a);OGATEB,XR(B)::QAB(G)
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).