MESON Chess Problem Database

Problem Display
PID: 123049 (3r4/3Rp1P1/p1n1PPQB/2R5/B2qN2K/2PkNp1p/3PbP2/1nr5 w - - 0 1)

Boyer, Jean-Pierre

4th Prize, Oudot MT, 1975-1976

3r4/3Rp1P1/p1n1PPQB/2R5/B2qN2K/2PkNp1p/3PbP2/1nr5

#2

14 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Bc2#
    • 1...Re1
      • 2.Bc2#
    • 1...Rf1
      • 2.Bc2#
    • 1...Rg1
      • 2.Bc2#
    • 1...Rh1
      • 2.Bc2#
    • 1...Rc2
      • 2.Bxc2#
    • 1...a5
      • 2.Bb5#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sg3#
      • 1...Sxd2
        • 2.Sxd2#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...exf6
        • 2.Sexf6#
      • 1...Se5
        • 2.Sxe5#
      • 1...Rxd7!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sf4#
      • 1...Qxf2+
        • 2.Sxf2#
        • 2.Sg3#
      • 1...Qxf6+
        • 2.Sexf6#
      • 1...Qxc5
        • 2.Sd6#
      • 1...Qxa4
        • 2.Sb4#
      • 1...Qxd5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::B(E)
    • R(b);N_GUARD::B(E),XR(b)
    • P(h);N_GUARD::B(E)
  • Tries
    • Try
      • S(D);N_SPINS(F)
      • Threat
        • QAB(K)+S(F)
      • Vars
        • S(a);XP(A)::QAB(K)+S(F),XS(a)
        • S(a);XP(C)::QAB(K)+S(F),XS(a)
        • P(j);XP(J)::QAB(K)+S(F),XP(j)
        • S(i);N_GUARD::S(D),XS(i)
      • Refutation
        • R(k);N_SPINQ(g),XR(M)
  • Actual
    • S(D);N_PINQ(g)
    • Threat
      • S(D)
    • Vars
      • Q(g);CHECK,N_PINS(F),XP(J)::QAB(K)+S(F),XQ(g)
      • Q(g);N_PINS(F),XR(H)::QAB(K)+S(F)
      • Q(g);XB(E)::R(M)+S(D),DCHECK
      • Q(g);N_PINS(F),P_SPINQ(g),XS(D)::QAB(K)+S(F)
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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).