MESON Chess Problem Database

Problem Display
PID: 70843 (b7/2r1R2B/1B3q2/4bN2/2ppkP1p/Q2rP1P1/3pn3/4R1NK w - - 0 1)

Stimson, James Frank (Ua Tane)

Densmore MT (Pittsburgh Gazette-Times), 1918-1920

b7/2r1R2B/1B3q2/4bN2/2ppkP1p/Q2rP1P1/3pn3/4R1NK

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Rxe5#
    • 1...Qxf5
      • 2.Rxe5#
    • 1...Qxb6
      • 2.Rxe5#
    • 1...Qc6
      • 2.Rxe5#
    • 1...Qg6
      • 2.Rxe5#
    • 1...Qh6
      • 2.Rxe5#
    • 1...Qf7
      • 2.Rxe5#
    • 1...Qf8
      • 2.Rxe5#
  • Tries
    • 1.Sd6+?
      • 1...Kd5
        • 2.Be4#
      • 1...Kxe3+!
  • Keys
    • 1.Sxd4+!
      • 1...Kxe3+
        • 2.Sc6#
      • 1...Kd5
        • 2.e4#
      • 1...Qf5
        • 2.Rxe5#
      • 1...Qg6
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(i);N_GUARD::R1(J),XB(h)
    • Q(i);N_GUARD,P_SPINQ(i),XS(H)::R1(J),XB(h)
    • Q(i);N_GUARD,XB(I)::R1(J),XB(h)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(f);N_SPINB(h),S_FLIGHT::B(K)
      • Refutation
        • K(f);CHECK,P-FLIGHT,P_SPINP(e),P_SPINR(c),P_SPINS(b),XP(E)
  • Actual
    • S(H);CHECK,XP(e)
    • Vars
      • K(f);CHECK,P-FLIGHT,P_SPINR(c),P_SPINS(b),XP(E)::B(I)+S(H)
      • K(f);N_SPINB(h),OGATE,S_FLIGHT::P(E)
      • Q(i);P_SPINQ(i)::R1(J),XB(h)
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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).