MESON Chess Problem Database

Problem Display
PID: 2478 (b2b4/Rn1B2B1/RnPk1p2/p1N5/P3P3/5N2/1Q6/7K w - - 0 1)

Lord, Frederick William

The Westminster Papers, 1874

b2b4/Rn1B2B1/RnPk1p2/p1N5/P3P3/5N2/1Q6/7K

#2

11 + 7

1693 English Chess Problems 1876

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qd4#
    • 1...Kc7
      • 2.Qh2#
    • 1...Ke7
      • 2.Qxf6#
    • 1...Bc7
      • 2.Bf8#
    • 1...f5
      • 2.Qe5#
  • Tries
    • 1.Sxb7+?
      • 1...Kc7
        • 2.Qh2#
      • 1...Ke7
        • 2.Qxf6#
      • 1...Bxb7!
    • 1.Bf8+?
      • 1...Kc7
        • 2.Qh2#
      • 1...Be7!
    • 1.Qxf6+?
      • 1...Kxc5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qe5#
        • 2.Qf4#
      • 1...Bxf6!
    • 1.cxb7?
      • 1...Kxc5
        • 2.Qd4#
      • 1...Kc7
        • 2.Qh2#
      • 1...Ke7
        • 2.Qxf6#
      • 1...Bc7
        • 2.Bf8#
      • 1...Be7
        • 2.Qxb6#
      • 1...f5
        • 2.Qe5#
      • 1...Bxb7!
  • Keys
    • 1.c7!
      • 1...Kxc5
        • 2.Qd4#
      • 1...Kxc7
        • 2.Qh2#
      • 1...Ke7
        • 2.Qxf6#
      • 1...Bxc7
        • 2.Bf8#
      • 1...Sxc5
        • 2.c8S#
      • 1...Be7
        • 2.Qxb6#
      • 1...f5
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XS(F)::QAB1(B)
    • K(c);P_SPINS(e),S_FLIGHT::QAB(B)
    • K(c);S_FLIGHT::QAB1(B),XP(d)
    • B(g);N_GUARD,SBLOCK::B(K)
    • P(d);N_GUARD::QAB1(B)
  • Tries
    • Try
      • S(F);CHECK,XS(e)
      • Vars
        • K(c);S_FLIGHT::QAB(B)
        • K(c);S_FLIGHT::QAB1(B),XP(d)
      • Refutation
        • B(f);XS(F)
    • Try
      • B(K);CHECK
      • Vars
        • K(c);P_SPINS(e),S_FLIGHT::QAB(B)
      • Refutation
        • B(g);P_SPINB(g)
    • Try
      • Q(B);CHECK,XP(d)
      • Vars
        • K(c);S_FLIGHT,XS(F)::QAB1(B)
      • Refutation
        • B(g);XQ(B)
    • Try
      • P(H);P_PINS(b),XS(e)
      • Vars
        • K(c);N_SPINS(b),S_FLIGHT,XS(F)::QAB1(B)
        • K(c);N_SPINS(b),S_FLIGHT::QAB(B)
        • K(c);N_SPINS(b),S_FLIGHT::QAB1(B),XP(d)
        • B(g);N_GUARD,SBLOCK::B(K)
        • B(g);N_GUARD,SBLOCK::QAR2(B),XS(b)
        • P(d);N_GUARD::QAB1(B)
      • Refutation
        • B(f);XP(H)
  • Actual
    • P(H);P_PINS(b)
    • Vars
      • K(c);N_SPINS(b),S_FLIGHT,XS(F)::QAB1(B)
      • K(c);N_SPINS(b),P_SPINS(e),S_FLIGHT,XP(H)::QAB(B)
      • K(c);N_SPINS(b),S_FLIGHT::QAB1(B),XP(d)
      • B(g);N_GUARD,SBLOCK,XP(H)::B(K)
      • S(e);SBLOCK,XS(F)::P=S
      • B(g);SBLOCK::QAR2(B),XS(b)
      • P(d);N_GUARD::QAB1(B)
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