MESON Chess Problem Database

Problem Display
PID: 198370 (6nQ/K3pp2/R4r2/3Pk3/R7/4NP1B/p6b/1b6 w - - 0 1)

Beechey, H

Brisbane Courier, 1920

6nQ/K3pp2/R4r2/3Pk3/R7/4NP1B/p6b/1b6

#2

8 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Rxe4#
    • 1...Bg1
      • 2.f4#
  • Tries
    • 1.Sg4+?
      • 1...Kf5
        • 2.Qh5#
      • 1...Kxd5!
    • 1.Rxf6?
      • threat
        • 2.Re6#
      • 1...Sxf6
        • 2.Qb8#
      • 1...e6
        • 2.Rxe6#
      • 1...Be4
        • 2.Rxe4#
      • 1...exf6!
    • 1.Qh5+?
      • 1...Bf5
        • 2.Re4#
      • 1...Rf5!
  • Keys
    • 1.Be6!
      • threat
        • 2.Sg4#
      • 1...fxe6
        • 2.Rxe6#
      • 1...Be4
        • 2.Rxe4#
      • 1...Bf5
        • 2.Qxh2#
      • 1...Bg1
        • 2.f4#
      • 1...Sh6
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::R1(D),XB(a)
    • B(c);N_GUARD,P_PINS(A)::P(B)
  • Tries
    • Try
      • S(A);CHECK
      • Vars
        • K(d);N_SPINR(e),P-FLIGHT::QAR2(H)
      • Refutation
        • K(d);N_SPINR(e),P-FLIGHT,XP(E)
    • Try
      • R(F);XR(e)
      • Threat
        • QAB(H)+R(F),DCHECK
      • Vars
        • S(h);OGATE,P_SPINS(h),SBLOCK,XR(F)::QAB(H)
        • P(f);::QAB(H)+R(F),DCHECK,XP(f)
        • B(a);N_GUARD::R1(D),XB(a)
      • Refutation
        • P(f);P_SPINP(f),XR(F)
    • Try
      • Q(H);CHECK,N_PINR(e)
      • Vars
        • B(a);P_SPINB(a)::R1(D)
      • Refutation
        • R(e);P_SPINR(e)
  • Actual
    • B(C);
    • Threat
      • S(A)
    • Vars
      • P(g);OGATE,XB(C)::R1(F),XP(g)
      • B(a);N_GUARD::R1(D),XB(a)
      • B(a);::QAB(H),XB(c)
      • B(c);N_GUARD,P_PINS(A)::P(B)
      • S(h);OGATE::QAB(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).