MESON Chess Problem Database

Problem Display
PID: 118310 (8/5p1B/4p3/Q4Nb1/1p2k1pP/4pNP1/1B2pr1r/Kn6 w - - 0 1)

Pradignat, Emile Leonard

La Presse, 1895

8/5p1B/4p3/Q4Nb1/1p2k1pP/4pNP1/1B2pr1r/Kn6

#2

8 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf3
      • 2.Qa8#
    • 1...Rxf3
      • 2.Sd6#
    • 1...Bf6
      • 2.S5d4#
    • 1...gxf3
      • 2.Sd6#
    • 1...exf5
      • 2.Qxf5#
  • Tries
    • 1.Se1?
      • threat
        • 2.Sd6#
        • 2.Qe5#
        • 2.Qa8#
      • 1...Rxf5
        • 2.Qe5#
        • 2.Qa8#
      • 1...exf5
        • 2.Qe5#
        • 2.Qa8#
      • 1...Bf4
        • 2.Sd6#
        • 2.Qa8#
      • 1...Bf6
        • 2.Sd6#
        • 2.Qa8#
      • 1...e5
        • 2.Sd6#
        • 2.Qxe5#
        • 2.Qa8#
      • 1...f6
        • 2.Sd6#
        • 2.Qa8#
      • 1...Sc3!
    • 1.Se5?
      • threat
        • 2.Sd6#
        • 2.Qa8#
      • 1...Rxf5
        • 2.Qa8#
      • 1...exf5
        • 2.Qa8#
      • 1...Sc3!
    • 1.Qxb4+?
      • 1...Kd3
        • 2.Se1#
      • 1...Kxf3
        • 2.Qb7#
      • 1...Kd5!
  • Keys
    • 1.Bf6!
      • threat
        • 2.S5d4#
      • 1...Kd3
        • 2.Sd6#
      • 1...Kxf3
        • 2.Qa8#
      • 1...Rxf3
        • 2.Sd6#
      • 1...Rxh4
        • 2.S5xh4#
      • 1...exf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(g);S_FLIGHT,XS(C)::QAB(F)
    • R(c);SBLOCK,XS(C)::B(H)+S(G),DCHECK
    • B(i);P_PINB(B),S_CUTP(k)::B(H)+S(G)
    • P(h);SBLOCK,XS(C)::B(H)+S(G),DCHECK
    • P(j);OGATE,P_SPINP(j),XS(G)::QAB1(F),XP(j)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);P_SPINR(c),XS(G)::QAB(F)
        • P(j);P_SPINP(j),XS(G)::QAB(F)
      • Refutation
        • S(a);
    • Try
      • Q(F);CHECK,XP(f)
      • Vars
        • K(g);S_FLIGHT::S(C)
        • K(g);S_FLIGHT,XS(C)::QAB(F)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • B(B);
    • Threat
      • B(H)+S(G)
    • Vars
      • K(g);S_FLIGHT::B(H)+S(G)
      • K(g);S_FLIGHT,XS(C)::QAB(F)
      • R(c);SBLOCK,XS(C)::B(H)+S(G),DCHECK
      • R(d);XP(E)::B(H)+S(G),XR(d)
      • P(j);OGATE,P_SPINP(j),XS(G)::QAB1(F),XP(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).