MESON Chess Problem Database

Problem Display
PID: 159498 (3R4/Kp3RN1/bN6/4p3/2rPkPr1/2p1p3/4Q3/8 w - - 0 1)

Antonov, Yuri Mikhailovich

Hlas l'udu, 1980

3R4/Kp3RN1/bN6/4p3/2rPkPr1/2p1p3/4Q3/8

#2

8 + 8

15148 Sadier Collection 2016
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...exd4
      • 2.Re8#
    • 1...exf4
      • 2.Re7#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Qxe3#
      • 1...Kxd4
        • 2.Qxe3#
      • 1...exd4
        • 2.Re7#
      • 1...exf4
        • 2.Sf6#
      • 1...Rg3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qxe3#
      • 1...Kxf4
        • 2.Qxe3#
      • 1...exd4
        • 2.Sd6#
      • 1...exf4
        • 2.Re8#
      • 1...Rg3
        • 2.Sxg3#

Anticipated by 93905(1963)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(f);OGATEB,SBLOCK,XP(B)::R(H)
    • P(f);OGATEB,SBLOCK,XP(C)::R(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAR1(A),XP(b)
      • Vars
        • K(d);N_SPINP(b),P-FLIGHT,XP(B)::QAB1(A),XP(b)
        • P(f);OGATEB,SBLOCK,XP(B)::R(F)
        • P(f);SBLOCK,XP(C)::S(D)
      • Refutation
        • R(e);
  • Actual
    • S(G);
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • K(d);N_SPINP(b),P-FLIGHT,XP(C)::QAB1(A),XP(b)
      • P(f);SBLOCK,XP(B)::S(G)
      • P(f);OGATEB,SBLOCK,XP(C)::R(H)
      • R(e);N_GUARD::S(G),XR(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).