MESON Chess Problem Database

Problem Display
PID: 59326 (3q2N1/7b/7B/3Pb3/1R1pknQ1/4P2p/B2PP1n1/K4R2 w - - 0 1)

Comay, Ofer

Costeff, Gadi

Einat, Paz

Elkies, Noam D

2nd Prize, Halkidiki Quick Ty., 2004

3q2N1/7b/7B/3Pb3/1R1pknQ1/4P2p/B2PP1n1/K4R2

#2

11 + 8

721 Variantim 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Bb1#
    • 1...Bf5
      • 2.Qf3#
    • 1...Sxe3
      • 2.d3#
  • Tries
    • 1.Qxg2+?
      • 1...Kf5
        • 2.e4#
      • 1...Sxg2
        • 2.d3#
      • 1...hxg2!
    • 1.Qg6+?
      • 1...Sxg6
        • 2.d3#
      • 1...Bxg6!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Rxd4#
      • 1...Qxd5
        • 2.Sf6#
      • 1...Sxe3
        • 2.Rxf4#
      • 1...Sxe2
        • 2.Bb1#
      • 1...Sxe6
        • 2.d3#
      • 1...Qb6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(h);SBLOCK,XP(I)::B(C)
    • B(g);SBLOCK::QAB1(H)
    • S(a);SBLOCK,XP(F)::P(D)
  • Tries
    • Try
      • Q(H);CHECK,N_PINS(e),XS(a)
      • Vars
        • K(d);N_SPINP(c),OGATE,P_SPINS(e),S_FLIGHT::P(F)
        • S(e);XQ(H)::P(D)
      • Refutation
        • P(b);XQ(H)
    • Try
      • Q(H);CHECK,N_PINS(e)
      • Vars
        • S(e);XQ(H)::P(D)
      • Refutation
        • B(g);XQ(H)
  • Actual
    • Q(H);N_PINS(e),P_PINB(f)
    • Threat
      • R1(G),XP(c)
    • Vars
      • Q(h);N_GUARD,XP(I)::S(K)
      • S(a);N_GUARD,XP(F)::R1(B),XS(e)
      • S(e);N_GUARD,XP(E)::B(C)
      • S(e);N_GUARD,N_SPINB(f),XQ(H)::P(D)
      • Q(h);N_GUARD::S(K)
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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).