MESON Chess Problem Database

Problem Display
PID: 147189 (2B1R2N/3n1pr1/2N1b2n/Rq3kPQ/1r2p2K/1p2P1p1/6P1/8 w - - 0 1)

Langstaff, William A

Bristol Times and Mirror, 1926

(First published on Mon Jan 25 1926)

2B1R2N/3n1pr1/2N1b2n/Rq3kPQ/1r2p2K/1p2P1p1/6P1/8

#2

10 + 11

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Se7#
    • 1...Rxg5
      • 2.Qxg5#
    • 1...Bc4
      • 2.Sd4#
    • 1...Bd5
      • 2.Re5#
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sg8
      • 2.Qg4#
    • 1...Se5
      • 2.Se7#
    • 1...f6
      • 2.g6#
  • Tries
    • 1.Rxb5+?
      • 1...Bd5
        • 2.Bxd7#
        • 2.Rxd5#
        • 2.Re5#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Se5
        • 2.Se7#
        • 2.Rxe5#
      • 1...Rxb5!
    • 1.Qe2?
      • threat
        • 2.Qf1#
      • 1...Bc4
        • 2.Sd4#
      • 1...Bd5
        • 2.Re5#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Se5
        • 2.Se7#
      • 1...Sc5!
    • 1.gxh6+?
      • 1...Rg5
        • 2.Qxg5#
      • 1...Kf6!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qf1#
      • 1...Bc4
        • 2.Sd4#
      • 1...Bd5
        • 2.Re5#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sc5
        • 2.Qd5#
      • 1...Se5
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(e);::S(G)
    • R(k);OGATE,P_SPINR(k),XP(E)::QAR1(F),XR(k)
    • B(g);P_SPINS(i),S_CUTR(c)::S(G)
    • B(g);N_SPINQ(e),OGATE,P_SPINS(i)::R1(I)
    • S(h);N_GUARD::QAB1(F),XS(h)
    • S(h);N_GUARD::QAB1(F)
    • S(i);N_SPINQ(e),P_SPINB(g),SBLOCK::S(G)
    • P(j);SBLOCK::QAR(F)+P(E)
  • Tries
    • Try
      • R(D);CHECK,XQ(e)
      • Vars
        • S(i);N_GUARD,P_SPINB(g),P_SPINS(i)::R(D),XS(i)
      • Refutation
        • R(c);XR(D)
    • Try
      • Q(F);
      • Threat
        • QAR(F)
      • Vars
        • B(g);P_SPINS(i),S_CUTR(c)::S(G)
        • B(g);N_SPINQ(e),OGATE,P_SPINS(i)::R1(I)
        • S(h);N_GUARD::QAB1(F),XS(h)
        • S(i);N_SPINQ(e),P_SPINB(g),SBLOCK::S(G)
      • Refutation
        • S(i);N_SPINQ(e),P_SPINB(g)
    • Try
      • P(E);CHECK,XS(h)
      • Vars
        • R(k);N_GUARD,P_SPINR(k)::QAR1(F),XR(k)
      • Refutation
        • K(f);N_SPINQ(e),P-FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • B(g);P_SPINS(i),S_CUTR(c)::S(G)
      • B(g);N_SPINQ(e),OGATE,P_SPINS(i)::R1(I)
      • S(h);N_GUARD::QAB1(F),XS(h)
      • S(i);N_GUARD,N_SPINQ(e),P_SPINB(g),S_CUTQ(e)::QAR2(F)
      • S(i);N_SPINQ(e),P_SPINB(g),SBLOCK::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).