MESON Chess Problem Database

Problem Display
PID: 15609 (b5n1/pn1B4/3B3b/2Pkp1p1/2NpN3/P5P1/3R4/1K1Q4 w - - 0 1)

Hoffmann, Fritz

Journal de Geneve, 1986

b5n1/pn1B4/3B3b/2Pkp1p1/2NpN3/P5P1/3R4/1K1Q4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Qh1#
  • Tries
    • 1.Sb6+?
      • 1...Kxe4
        • 2.Qe2#
      • 1...axb6!
    • 1.Sf6+?
      • 1...Kxc4
        • 2.Qc2#
      • 1...Sxf6!
    • 1.Bxe5?
      • threat
        • 2.Rxd4#
      • 1...Kxc4
        • 2.Rxd4#
      • 1...Kxe4
        • 2.Rxd4#
        • 2.Qh1#
      • 1...d3!
    • 1.Be6+?
      • 1...Kxe4
        • 2.Qe2#
        • 2.Qg4#
        • 2.Qh1#
      • 1...Kc6
        • 2.Qa4#
      • 1...Kxe6!
    • 1.Qc2?
      • threat
        • 2.Se3#
      • 1...d3
        • 2.Qxd3#
      • 1...g4!
    • 1.Qe2?
      • threat
        • 2.Sc3#
      • 1...d3
        • 2.Qxd3#
      • 1...Sxd6!
    • 1.Qb3?
      • threat
        • 2.Sc3#
      • 1...Sxd6
        • 2.Scxd6#
      • 1...d3
        • 2.Qxd3#
      • 1...Kxe4!
    • 1.Qf3?
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Qf7#
      • 1...d3
        • 2.Qxd3#
      • 1...g4!
    • 1.Qa4?
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Qc6#
      • 1...d3
        • 2.Se3#
      • 1...Sxd6!
    • 1.Qf1?
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Bc6#
        • 2.Qg2#
        • 2.Qh1#
      • 1...d3
        • 2.Qxd3#
      • 1...Sxd6!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Se3#
      • 1...Kxc4
        • 2.Qe6#
      • 1...d3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINP(a),OGATEB,S_FLIGHT,XS(G)::QAB(B)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XS(G)::QAR2(B)
      • Refutation
        • P(f);XS(F)
    • Try
      • S(G);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XS(F)::QAR2(B)
      • Refutation
        • S(i);XS(G)
    • Try
      • B(I);XP(c)
      • Threat
        • R1(C),XP(a)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XS(F)::R1(C),XP(a)
      • Refutation
        • P(a);
    • Try
      • B(J);CHECK
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT::QAB(B)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XB(J)
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • S(G)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • S(g);XB(I)
    • Try
      • Q(B);
      • Threat
        • S(G)
      • Vars
        • S(g);XB(I)::QAB(B)+S(F),XS(g)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(b);N_SPINP(a),S_FLIGHT,XS(G)
    • Try
      • Q(B);
      • Threat
        • S(F)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XS(F)::QAB(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • P(d);
    • Try
      • Q(B);
      • Threat
        • S(G)
      • Vars
        • K(b);N_SPINP(a),S_FLIGHT,XS(G)::QAB(B)
        • P(a);::S(F)
      • Refutation
        • S(g);XB(I)
    • Try
      • Q(B);
      • Threat
        • S(G)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • S(g);XB(I)
  • Actual
    • Q(B);
    • Threat
      • S(F)
    • Vars
      • K(b);N_SPINP(a),S_FLIGHT,XS(F)::QAB(B)
      • P(a);::S(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).