MESON Chess Problem Database

Problem Display
PID: 196023 (q7/n7/B2pn3/2pk2p1/Q3pP2/8/K3P3/8 w - - 0 1)

Kerles, Josef

Haagsche Courant, 1899

q7/n7/B2pn3/2pk2p1/Q3pP2/8/K3P3/8

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qc4#
    • 1...Sd4
      • 2.Bc4#
    • 1...Sc6
      • 2.Qc4#
    • 1...c4
      • 2.Qxc4#
  • Tries
    • 1.Qb3+?
      • 1...Kd4
        • 2.e3#
      • 1...c4
        • 2.Qxc4#
      • 1...Kc6!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Sxf4
        • 2.Qxe4#
      • 1...exd3
        • 2.e4#
      • 1...gxf4
        • 2.Qxe4#
      • 1...Sd4
        • 2.Bc4#
      • 1...Sc7
        • 2.Qxe4#
      • 1...Sg7
        • 2.Qxe4#
      • 1...Sd8
        • 2.Qxe4#
      • 1...Sf8
        • 2.Qxe4#
      • 1...Sb5
        • 2.Bxe4#
      • 1...c4
        • 2.Qxc4#
      • 1...Sc6
        • 2.Bxe4#
      • 1...Sc8
        • 2.Bxe4#
      • 1...e3
        • 2.Be4#
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • Q(h);SBLOCK::QAB1(C)
    • S(f);SBLOCK::B(E)
    • S(g);SBLOCK::QAB1(C)
    • P(b);::QAB1(C),XP(b)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);P-FLIGHT::P(B)
        • P(b);P_SPINP(b)::QAB1(C),XP(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • B(E);
    • Threat
      • DUALS(2)
    • Vars
      • S(f);XP(D)::QAB1(C),XP(a)
      • P(a);OGATE,XB(E)::P(B)
      • P(d);XP(D)::QAB1(C),XP(a)
      • S(f);SBLOCK::B(E)
      • S(f);::QAB1(C),XP(a)
      • S(g);P_PINQ(C)::B(E),XP(a)
      • P(b);::QAB1(C),XP(b)
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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).