MESON Chess Problem Database

Problem Display
PID: 146614 (1b6/6r1/nppNB3/1pk2p1r/2N4p/P7/3QP1nK/8 w - - 0 1)

Thomson, Robert Gavin

Hampshire Telegraph, 1920

(First published on Fri Nov 19 1920)

1b6/6r1/nppNB3/1pk2p1r/2N4p/P7/3QP1nK/8

#2

7 + 11

14868 Pirnie Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Sb7#
    • 1...Bxd6+
      • 2.Qxd6#
    • 1...Se1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sf4
      • 2.Qe3#
    • 1...Sb4
      • 2.axb4#
    • 1...Sc7
      • 2.Sb7#
    • 1...f4
      • 2.Se4#
  • Tries
    • 1.e3?
      • threat
        • 2.Qd4#
      • 1...Bxd6+
        • 2.Qxd6#
      • 1...Sxe3
        • 2.Qxe3#
      • 1...Rg4!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe5#
      • 1...Bxd6+
        • 2.Se5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Sf4
        • 2.Qe3#
      • 1...Sb4
        • 2.axb4#
      • 1...Sc7
        • 2.Sb7#
      • 1...f4
        • 2.Se4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • R(j);N_PINS(F)::S(F)
    • B(k);CHECK,OGATE,XS(F)::QAB1(A),XB(k)
    • S(a);N_GUARD::QAB(A)
    • S(a);N_GUARD::QAB(A),XS(a)
    • S(a);N_GUARD,N_PINS(F)::QAB(A)
    • S(g);OGATE::P(D),XS(g)
    • S(g);N_PINS(F)::S(F)
    • P(e);N_PINS(F)::S(F)
  • Tries
    • Try
      • P(B);
      • Threat
        • QAB1(A)
      • Vars
        • B(k);CHECK,OGATE,XS(F)::QAB1(A),XB(k)
        • S(a);OGATE,XP(B)::QAB(A),XS(a)
      • Refutation
        • R(j);
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • B(k);CHECK,SBLOCK,XS(F)::QAR(A)+S(E)
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(a);N_GUARD,N_PINS(F)::QAB(A)
      • S(g);OGATE::P(D),XS(g)
      • S(g);N_PINS(F)::S(F)
      • P(e);N_PINS(F)::S(F)
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