MESON Chess Problem Database

Problem Display
PID: 69546 (2qbQ3/PNkpnR2/P5p1/2P2pp1/1NK2np1/4R1B1/8/8 w - - 0 1)

Authier, Gabriel

Delaliau, Emmanuel

Het Belgisch Schaakbord (L'Echiquier Belge), 1957

2qbQ3/PNkpnR2/P5p1/2P2pp1/1NK2np1/4R1B1/8/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Qe5#
    • 1...Sc6
      • 2.Sd5#
    • 1...Sg8
      • 2.Qe5#
    • 1...d5+
      • 2.Sxd5#
    • 1...d6
      • 2.Qc6#
  • Tries
    • 1.Bxf4+?
      • 1...d6
        • 2.Sd5#
        • 2.Bxd6#
        • 2.Qc6#
      • 1...gxf4!
    • 1.Rexe7?
      • 1...Qxb7
        • 2.Qxd7#
      • 1...Qa8
        • 2.Qxd7#
      • 1...Qb8
        • 2.Qxd7#
      • 1...Bxe7!
    • 1.Rfxe7?
      • 1...Qxb7
        • 2.Qxd7#
      • 1...Qa8
        • 2.Qxd7#
      • 1...Qb8
        • 2.Qxd7#
      • 1...Bxe7!
    • 1.Qxe7?
      • threat
        • 2.Qd6#
        • 2.Qe5#
      • 1...Qxb7
        • 2.Qxd7#
      • 1...Qa8
        • 2.Qxd7#
      • 1...Qb8
        • 2.Qxd7#
      • 1...Bxe7!
  • Keys
    • 1.Rd3!
      • 1...d5+
        • 2.Sxd5#
      • 1...Qxb7
        • 2.Qxd7#
      • 1...Qa8
        • 2.Qxd7#
      • 1...Qb8
        • 2.Qxd7#
      • 1...Sd5
        • 2.Qe5#
      • 1...Sc6
        • 2.Sd5#
      • 1...Sg8
        • 2.Qe5#
      • 1...d6
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(h);OGATE,P_SPINP(g)::QAB(J)
    • S(h);N_GUARD,P_SPINP(g),SBLOCK::S(C)
    • P(g);CHECK,S_CUTS(h)::S(C),XP(g)
    • P(g);N_SPINS(a),OGATE,P_SPINS(h)::QAR1(J)
  • Tries
    • Try
      • B(B);CHECK,XS(a)
      • Refutation
        • P(d);XB(B)
    • Try
      • R(A);P_PINP(g),XS(h)
      • Vars
        • Q(i);N_GUARD,XS(H)::QAR1(J),XP(g)
        • Q(i);N_GUARD::QAR1(J),XP(g)
      • Refutation
        • B(j);N_SPINP(g),XR(A)
    • Try
      • R(I);P_PINP(g),XS(h)
      • Vars
        • Q(i);N_GUARD,XS(H)::QAR1(J),XP(g)
        • Q(i);N_GUARD::QAR1(J),XP(g)
      • Refutation
        • B(j);N_SPINP(g),XR(I)
    • Try
      • Q(J);P_PINP(g),XS(h)
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);N_GUARD,XS(H)::QAR1(J),XP(g)
        • Q(i);N_GUARD::QAR1(J),XP(g)
      • Refutation
        • B(j);N_SPINP(g),XQ(J)
  • Actual
    • R(A);
    • Vars
      • P(g);CHECK,S_CUTS(h)::S(C),XP(g)
      • Q(i);N_GUARD,XS(H)::QAR1(J),XP(g)
      • Q(i);N_GUARD::QAR1(J),XP(g)
      • S(h);OGATE,P_SPINP(g)::QAB(J)
      • S(h);N_GUARD,P_SPINP(g),SBLOCK::S(C)
      • P(g);N_SPINS(a),OGATE,P_SPINS(h)::QAR1(J)
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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).