MESON Chess Problem Database

Problem Display
PID: 78159 (3n2Q1/8/6K1/1Pp1N3/2r1k1N1/3pP1pB/3np3/5b2 w - - 0 1)

Pradignat, Emile Leonard

La Presse, 1898

3n2Q1/8/6K1/1Pp1N3/2r1k1N1/3pP1pB/3np3/5b2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Qxc4#
    • 1...Se6
      • 2.Qa8#
    • 1...Sf7
      • 2.Qa8#
  • Tries
    • 1.Sf6+?
      • 1...Kxe5
        • 2.Qd5#
      • 1...Kxe3!
    • 1.Bg2+?
      • 1...Sf3
        • 2.Bxf3#
        • 2.Qxc4#
      • 1...Bxg2!
    • 1.Qxd8?
      • threat
        • 2.Qxd3#
        • 2.Qa8#
      • 1...e1Q
        • 2.Qa8#
      • 1...e1S
        • 2.Qa8#
      • 1...e1B
        • 2.Qa8#
      • 1...e1R
        • 2.Qa8#
      • 1...Rc3
        • 2.Qa8#
      • 1...Ra4
        • 2.Qxd3#
      • 1...Rd4!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sg5#
      • 1...Kf3
        • 2.Sg5#
      • 1...Kd5
        • 2.Sf6#
      • 1...Sxf7
        • 2.Qa8#
      • 1...Sf3
        • 2.Sd6#
      • 1...Se6
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(b);N_GUARD::QAR2(G),XR(f)
    • S(i);OGATE::QAB(G)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(g);P-FLIGHT,XS(E)::QAR1(G)
      • Refutation
        • K(g);P-FLIGHT,XP(A)
    • Try
      • B(B);CHECK
      • Refutation
        • B(a);XB(B)
    • Try
      • Q(G);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);::QAB(G)
        • R(f);::QAB(G)
        • R(f);::QAB1(G),XP(d)
      • Refutation
        • R(f);
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(g);S_FLIGHT::S(E)
      • K(g);S_FLIGHT::S(C)
      • S(i);OGATE,XS(E)::QAB(G)
      • S(b);SBLOCK::S(E)
      • S(i);OGATE::QAB(G)
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).