MESON Chess Problem Database

Problem Display
PID: 203185 (nKR5/1p3NQ1/b7/4R1p1/1P1k3r/5P2/2P3Nb/6n1 w - - 0 1)

Stillingfleet Johnson, George

Western Daily Mercury, 1920

(First published on Fri Jun 18 1920)

nKR5/1p3NQ1/b7/4R1p1/1P1k3r/5P2/2P3Nb/6n1

#2

9 + 8

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rf5#
    • 1...Bxe5+
      • 2.Qxe5#
    • 1...Bd3
      • 2.c3#
  • Tries
    • 1.Qxg5?
      • threat
        • 2.Qe3#
        • 2.Qd8#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Bc4
        • 2.Qe3#
      • 1...Re4
        • 2.Qd8#
      • 1...Rf4
        • 2.Rd5#
        • 2.Qd8#
      • 1...Rh6
        • 2.Qe3#
      • 1...Rh8
        • 2.Qe3#
      • 1...Bf4
        • 2.Qd8#
      • 1...Bb5
        • 2.Qe3#
      • 1...Sb6
        • 2.Qe3#
      • 1...Sc7!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sf5#
      • 1...Bxe5+
        • 2.Qxe5#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sc7
        • 2.Re4#
      • 1...Rf4
        • 2.Re4#
      • 1...Bd3
        • 2.c3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);N_PINR(E)::QAB(G)+R(E)
    • B(b);CHECK,OGATE,P_SPINB(b),XR(E)::QAB1(G),XB(b)
    • B(f);SBLOCK::P(A)
  • Tries
    • Try
      • Q(G);XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);CHECK,OGATE,XR(E)::QAB1(G),XB(b)
        • B(f);::QAB1(G)
        • R(d);::QAR(G)
        • R(d);::QAB1(G)
        • B(b);::QAR(G)
        • S(h);::QAB1(G)
      • Refutation
        • S(h);N_PINR(E)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • B(b);CHECK,OGATE,P_SPINB(b),XR(E)::QAB1(G),XB(b)
      • B(f);N_GUARD::R1(I),XB(f)
      • S(h);N_PINR(E)::QAB(G)+R(E),DCHECK
      • R(d);N_PINR(E)::QAB(G)+R(E),DCHECK
      • B(f);SBLOCK::P(A)
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