MESON Chess Problem Database

Problem Display
PID: 233315 (2B1R2B/2p2pnP/4N3/rQp1kpp1/6r1/6b1/pP4P1/K7 w - - 0 1)

Kofman, Rafael Moiseevich

Chess Life, 1969

2B1R2B/2p2pnP/4N3/rQp1kpp1/6r1/6b1/pP4P1/K7

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Keys
    • 1.Sf4+!
      • 1...Kd4
        • 2.Qd3#
      • 1...Kxf4
        • 2.Qc4#
      • 1...Kd6
        • 2.Qd7#
      • 1...Kf6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Actual
    • S(E);CHECK
    • Vars
      • K(f);N_SPINP(e),S_FLIGHT::QAR1(D)
      • K(f);N_SPINP(e),N_SPINS(k),S_FLIGHT,XS(E)::QAR(D)
      • K(f);N_SPINP(e),N_SPINS(k),S_FLIGHT::QAR1(D)
      • K(f);N_SPINP(e),S_FLIGHT::QAR(D)
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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).