MESON Chess Problem Database

Problem Display
PID: 199627 (4R3/1K5B/3ppQN1/5b2/2p1kNPR/5p2/2pr1P2/8 w - - 0 1)

Aloni, Yoel

Hod, N

Variantim, 1994

4R3/1K5B/3ppQN1/5b2/2p1kNPR/5p2/2pr1P2/8

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qxf5#
    • 1...Bxg6
      • 2.Bxg6#
      • 2.Rxe6#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Qxe6+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Bxe6!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Qxf5#
      • 1...Kd3
        • 2.Sef4#
      • 1...Kd5
        • 2.Qxf5#
      • 1...Rxf2
        • 2.Qd4#
      • 1...Bxg4
        • 2.Se7#
      • 1...Bxe6
        • 2.Sf4#
      • 1...Bxg6
        • 2.Sf4#
      • 1...Rd5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • R(b);SBLOCK::QAB1(E),XB(f)
    • P(g);N_GUARD::QAR1(E)
  • Tries
    • Try
      • Q(E);CHECK,XP(h)
      • Vars
        • K(e);OGATE,P-FLIGHT::QAB1(E)
      • Refutation
        • B(f);P_SPINB(f),XQ(E)
  • Actual
    • S(B);XP(h)
    • Threat
      • QAB1(E),XB(f)
    • Vars
      • K(e);S_FLIGHT::S(B)
      • K(e);S_FLIGHT::QAR2(E),XB(f)
      • R(b);N_GUARD,XP(A)::QAR1(E)
      • B(f);P_SPINB(f),XP(C)::B(H)+S(F)
      • B(f);P_SPINB(f),XS(B)::B(H)+S(F)
      • B(f);N_GUARD,P_SPINB(f),XS(F)::R(I)+S(B)
      • R(b);SBLOCK::R(I)+S(B),DCHECK
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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).