MESON Chess Problem Database

Problem Display
PID: 34839 (3bR3/3pN1K1/3P1RP1/1Np1kB2/1p6/3p3n/8/2Q1r2b w - - 0 1)

Grinblat, Arieh

Retter, Yosef

HM., Ukrainian Folk Crafts, 2001

3bR3/3pN1K1/3P1RP1/1Np1kB2/1p6/3p3n/8/2Q1r2b

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Sc6#
    • 1...Sf4
      • 2.Qb2#
  • Tries
    • 1.Qxe1+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Kf4!
    • 1.Qxc5+?
      • 1...Bd5
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Be4!
      • threat
        • 2.Sc6#
      • 1...Kxe4
        • 2.Qxe1#
      • 1...Rxe4
        • 2.Qxc5#
      • 1...Bxe4
        • 2.Qb2#
      • 1...Bxe7
        • 2.Rxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(b);SBLOCK::R(I)+S(G),DCHECK
    • S(d);SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);CHECK,XR(a)
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::QAR1(A),XB(b)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • Q(A);CHECK,XP(f)
      • Vars
        • B(b);P_SPINB(b)::QAB1(A)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • R(I)+S(G),DCHECK
    • Vars
      • K(g);OGATEB,P-FLIGHT,XB(C)::QAR(A),XR(a)
      • R(a);SBLOCK,XB(C)::QAR2(A),XP(f)
      • B(b);SBLOCK,XB(C)::QAB(A)
      • B(i);OGATE,P_SPINB(i),XS(G)::R(I),XB(i)
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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).