MESON Chess Problem Database

Problem Display
PID: 197385 (8/5Q2/2bN4/p1p1pB2/r2k2qR/3p1RPp/3P4/4N2K w - - 0 1)

Bouchez, Laurent

Phenix, 1992

8/5Q2/2bN4/p1p1pB2/r2k2qR/3p1RPp/3P4/4N2K

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc4#
    • 1...Ra2
      • 2.Qc4#
    • 1...Ra3
      • 2.Qc4#
    • 1...Rc4
      • 2.Qxc4#
    • 1...Bxf3+
      • 2.Sxf3#
    • 1...Be4
      • 2.Sb5#
    • 1...Bb5
      • 2.Sxb5#
    • 1...Bb7
      • 2.Sb5#
    • 1...Bd7
      • 2.Rxd3#
    • 1...Ba8
      • 2.Sb5#
    • 1...Be8
      • 2.Rxd3#
  • Tries
    • 1.Rxg4+?
      • 1...Be4
        • 2.Sb5#
        • 2.Rxe4#
      • 1...e4!
  • Keys
    • 1.Be4!
      • threat
        • 2.Rxd3#
      • 1...Qxf3+
        • 2.Sxf3#
      • 1...Qxg3
        • 2.Sf5#
      • 1...Qxe4
        • 2.Sf5#
      • 1...Bxe4
        • 2.Sb5#
      • 1...c4
        • 2.Qa7#
      • 1...Ra3
        • 2.Qc4#
      • 1...Bb5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(c);N_GUARD,P_PINS(A)::QAR1(I)
    • R(c);N_GUARD::QAR1(I)
    • R(c);N_GUARD::QAR1(I),XR(c)
    • B(i);CHECK,XR(D)::S(A),XB(i)
    • B(i);N_GUARD,N_SPINQ(e)::S(H)
    • B(i);N_GUARD,N_PINR(D)::S(H),XB(i)
    • B(i);N_GUARD::S(H)
    • B(i);N_PINR(D)::R1(D),XP(a)
  • Tries
    • Try
      • R(F);CHECK,XQ(e)
      • Refutation
        • P(h);N_PINR(D),P_SPINP(h)
  • Actual
    • B(G);N_PINQ(e),N_SPINR(D)
    • Threat
      • R1(D),XP(a)
    • Vars
      • Q(e);CHECK,XR(D)::S(A),XQ(e)
      • Q(e);N_GUARD,XP(E)::S(H)
      • Q(e);N_GUARD,P_PINR(D),P_SPINQ(e),XB(G)::S(H)
      • B(i);N_GUARD,P_PINR(D),SBLOCK,XB(G)::S(H)
      • P(g);OGATEB::QAB(I)
      • R(c);N_GUARD::QAR1(I)
      • B(i);N_GUARD::QAR1(I)
HTML5 logo

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).