MESON Chess Problem Database

Problem Display
PID: 107144 (8/2p2p2/1pQPkp2/4bn2/3pR1Bp/3N4/1KN1n2r/4R3 w - - 0 1)

Fedyakov, Sergey

Kudesnik, 1991

8/2p2p2/1pQPkp2/4bn2/3pR1Bp/3N4/1KN1n2r/4R3

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Sf4#
    • 1...Sg1
      • 2.Sf4#
    • 1...Sc3
      • 2.Sf4#
    • 1...Sg3
      • 2.Sf4#
    • 1...Sf4
      • 2.Sxf4#
    • 1...b5
      • 2.Sc5#
  • Tries
    • 1.R1xe2?
      • threat
        • 2.Sxd4#
        • 2.Sf4#
      • 1...Rxe2
        • 2.Sf4#
      • 1...Rf2
        • 2.Sxd4#
      • 1...cxd6!
  • Keys
    • 1.Rxd4!
      • threat
        • 2.Qe8#
      • 1...Bxd4+
        • 2.Sxd4#
      • 1...Bxd6
        • 2.Re4#
      • 1...Sxd4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • S(a);N_GUARD,P_PINS(C)::S(D)
    • S(a);N_GUARD,P_PINS(C)::S(D),XS(a)
    • P(g);N_GUARD::S(D)
  • Tries
    • Try
      • R(A);XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • R(b);P_PINS(C),XR(A)::S(D)
        • R(b);::S(C),XP(c)
      • Refutation
        • P(j);P_SPINP(j),XP(H)
  • Actual
    • R(E);N_PINB(e),P_SPINR(E),XP(c)
    • Threat
      • QAR2(G)
    • Vars
      • B(e);CHECK,N_SPINS(f),P_SPINS(a),XR(E)::S(C),XB(e)
      • B(e);N_PINR(E),N_SPINS(f),P_SPINB(e),P_SPINS(a),XP(H)::R(E)
      • S(a);N_GUARD,P_PINS(C),P_SPINB(e),XR(E)::S(D)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).