MESON Chess Problem Database

Problem Display
PID: 146830 (BB1K4/Q3R3/3Nb2p/4k1bR/2p1NpP1/4np2/8/3r4 w - - 0 1)

Isaev, Leonid Antonovich

2nd Prize, Grantham Journal, 1926

(First published on Sat Jul 3 1926)

BB1K4/Q3R3/3Nb2p/4k1bR/2p1NpP1/4np2/8/3r4

#2

9 + 9

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sf7#
      • 2.Sc8#
      • 2.Se8#
    • 1...Rb1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf7#
    • 1...Rc1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sf7#
      • 2.Sc8#
      • 2.Se8#
    • 1...Re1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sf7#
      • 2.Sc8#
      • 2.Se8#
    • 1...Rf1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sf7#
      • 2.Sc8#
      • 2.Se8#
    • 1...Rg1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sf7#
      • 2.Sc8#
      • 2.Se8#
    • 1...Rh1
      • 2.Sxc4#
      • 2.Sb5#
      • 2.Sf5#
      • 2.Sf7#
      • 2.Sc8#
      • 2.Se8#
    • 1...Rxd6+
      • 2.Bxd6#
  • Tries
    • 1.Rxg5+?
      • 1...Sf5
        • 2.Rxf5#
      • 1...hxg5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd7#
      • 1...Kd4
        • 2.Sb5#
      • 1...Kf6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(a);CHECK,OGATE,P_SPINR(a),XS(D)::B(H),XR(a)
  • Tries
    • Try
      • R(C);CHECK,N_SPINR(F),P_PINB(h),XB(g)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(C),XS(b)
      • Refutation
        • P(i);XR(C)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • K(f);N_PINS(D),N_SPINB(g),S_FLIGHT::S(D)
      • K(f);N_PINR(F),N_SPINB(g),S_FLIGHT::R1(F),XB(h)
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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).