MESON Chess Problem Database

Problem Display
PID: 140062 (1nr5/pQ1N4/B4p1p/1q3N1K/bBk1p3/P1n5/P1P5/b7 w - - 0 1)

Fenner, A Jack

The Problemist, 1938

1nr5/pQ1N4/B4p1p/1q3N1K/bBk1p3/P1n5/P1P5/b7

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bb3
      • 2.axb3#
  • Tries
    • 1.Qxc8+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kd5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qd4#
      • 1...Kd5
        • 2.Se3#
      • 1...Qxa6
        • 2.Se3#
      • 1...Sxa2
        • 2.Qe6#
      • 1...axb6
        • 2.Sxb6#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Sb1
        • 2.Qe6#
      • 1...Sd1
        • 2.Qe6#
      • 1...Se2
        • 2.Qe6#
      • 1...Sd5
        • 2.Sd6#
      • 1...Sc6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 1
  • Sets
    • B(c);OGATE::P(A),XB(c)
  • Tries
    • Try
      • Q(H);CHECK,XR(k)
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAR2(H),XS(j)
      • Refutation
        • K(d);N_PINS(E),N_SPINQ(f),S_FLIGHT
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(d);N_PINS(E),N_SPINQ(f),S_FLIGHT::S(E)
      • Q(f);N_PINS(E),N_SPINQ(f),XB(G)::S(E)
      • S(b);N_GUARD,XP(A)::QAB(H)
      • P(i);XQ(H)::S(I),XP(i)
      • R(k);N_GUARD::QAR1(H),XR(k)
      • S(b);N_GUARD::QAB(H)
      • S(b);N_PINS(E),SBLOCK::S(E)
      • S(j);S_CUTR(k)::QAR1(H)
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).