MESON Chess Problem Database

Problem Display
PID: 68784 (2N1n1rr/Q5Nb/5kn1/7B/5B2/1K3R2/8/b7 w - - 0 1)

Bridgwater, Ralph Herbert

Sp. Prize, Grantham Journal, 1926

2N1n1rr/Q5Nb/5kn1/7B/5B2/1K3R2/8/b7

#2

7 + 7

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1956
6467 BCPS Solving Ty. (Harrogate) 2009
15372 Bridgwater Scrapbook 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf4
      • 2.Qe7#
    • 1...Sh4
      • 2.Qxa1#
      • 2.Qe7#
      • 2.Qf7#
    • 1...Se5
      • 2.Qe7#
    • 1...Se7
      • 2.Qxa1#
      • 2.Qxe7#
    • 1...Sf8
      • 2.Qxa1#
      • 2.Qe7#
      • 2.Qf7#
  • Tries
    • 1.Bc1+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Ke5!
    • 1.Bd2+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Ke5!
    • 1.Bh2+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Kg5!
    • 1.Be3+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Ke5!
    • 1.Bg3+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Kg5!
    • 1.Bd6+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Kg5!
    • 1.Bh6+?
      • 1...Sf4
        • 2.Qxa1#
        • 2.Qe7#
      • 1...Ke5!
    • 1.Bb8+?
      • 1...Sf4
        • 2.Qe7#
      • 1...Kg5!
    • 1.Qxa1+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Kf7!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Be5#
      • 1...Kf7
        • 2.Qe7#
      • 1...Kxg7
        • 2.Bh6#
      • 1...Rxg7
        • 2.Bg5#
      • 1...Sxf4
        • 2.Qe7#
      • 1...Sxg7
        • 2.Bg5#
      • 1...Be5
        • 2.Bxe5#
      • 1...Se5
        • 2.Bxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(c);N_GUARD,P_SPINS(c),XB(C)::QAB1(E)
    • S(c);N_GUARD::QAB1(E)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(C);CHECK
      • Vars
        • S(c);P_SPINS(c)::QAB1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);CHECK,XB(a)
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB1(E),XS(c)
      • Refutation
        • K(b);P-FLIGHT,P_SPINS(c)
  • Actual
    • Q(E);
    • Threat
      • R(B)+B(C),DCHECK
    • Vars
      • K(b);P-FLIGHT,P_SPINS(c)::QAR1(E)
      • K(b);S_FLIGHT,XS(F)::B(C)
      • R(f);SBLOCK,XS(F)::R(B)+B(C),DCHECK
      • S(c);N_GUARD,P_SPINS(c),XB(C)::QAB1(E)
      • S(e);SBLOCK,XS(F)::R(B)+B(C),DCHECK
      • B(a);::R(B)+B(C),DCHECK,XB(a)
      • S(c);::R(B)+B(C),DCHECK,XS(c)
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