MESON Chess Problem Database

Problem Display
PID: 139415 (8/3P4/1KNP1Rn1/p2k1p1b/p4P1p/B2P1P1N/1PB2PQ1/8 w - - 0 1)

Baird, Edith Elina Helen (Mrs WJ)

The Observer, 1921

(First published on Sun Dec 25 1921)

8/3P4/1KNP1Rn1/p2k1p1b/p4P1p/B2P1P1N/1PB2PQ1/8

#2

14 + 7

56 The Problemist 1937
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf3
      • 2.Qxf3#
    • 1...Bg4
      • 2.fxg4#
    • 1...Sxf4
      • 2.Sxf4#
  • Tries
    • 1.Se7+?
      • 1...Kd4
        • 2.Bc5#
      • 1...Sxe7!
    • 1.Rxf5+?
      • 1...Se5
        • 2.Rxe5#
      • 1...Ke6!
    • 1.Rxg6?
      • 1...Bxf3
        • 2.Qxf3#
      • 1...Bg4
        • 2.fxg4#
      • 1...Bxg6!
    • 1.Qxg6?
      • threat
        • 2.Rxf5#
        • 2.Qxf5#
      • 1...Bg4
        • 2.Qf7#
        • 2.Qg8#
      • 1...Bxg6!
  • Keys
    • 1.Bc5!
      • 1...Bxf3
        • 2.Qxf3#
      • 1...Sxf4
        • 2.Sxf4#
      • 1...Se5
        • 2.Se7#
      • 1...Bg4
        • 2.fxg4#
      • 1...Se7
        • 2.Sxe7#
      • 1...Sf8
        • 2.Se7#
      • 1...Sh8
        • 2.Se7#
      • 1...a3
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE,P_SPINB(f),XP(G)::QAB(D),XB(f)
    • B(f);OGATE::QAB(D)+P(G),XB(f)
    • S(g);XP(I)::S(H),XS(g)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • K(d);P-FLIGHT::B(E)
      • Refutation
        • S(g);XS(K)
    • Try
      • R(M);CHECK,XP(e)
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::R1(M),XS(g)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • R(M);XS(g)
      • Vars
        • B(f);OGATE,P_SPINB(f),XP(G)::QAB(D),XB(f)
        • B(f);OGATE::QAB(D)+P(G),XB(f)
      • Refutation
        • B(f);XR(M)
    • Try
      • Q(D);XS(g)
      • Threat
        • DUALS(2)
      • Refutation
        • B(f);XQ(D)
  • Actual
    • B(E);
    • Vars
      • B(f);OGATE,P_SPINB(f),XP(G)::QAB(D),XB(f)
      • S(g);XP(I)::S(H),XS(g)
      • S(g);N_GUARD::S(K)
      • B(f);OGATE::QAB(D)+P(G),XB(f)
      • S(g);N_GUARD::S(K),XS(g)
      • P(a);N_GUARD::B(B)
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