MESON Chess Problem Database

Problem Display
PID: 152357 (8/8/3pp3/3kN3/3P1r2/2Q2P1B/1n6/1K6 w - - 0 1)

Laws, Benjamin Glover

Pen & Pencil, 1888

(First published on Sat Oct 13 1888)

8/8/3pp3/3kN3/3P1r2/2Q2P1B/1n6/1K6

#2

6 + 5

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qa5#
    • 1...Sd1
      • 2.Qc4#
    • 1...Sd3
      • 2.Qc4#
    • 1...Sa4
      • 2.Qc4#
    • 1...Sc4
      • 2.Qxc4#
    • 1...dxe5
      • 2.Qc5#
  • Tries
    • 1.Kxb2?
      • threat
        • 2.Qc4#
      • 1...Rxd4
        • 2.Qa5#
      • 1...dxe5
        • 2.Qc5#
      • 1...Rxf3!
    • 1.Qb3+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Kxd4!
  • Keys
    • 1.Bg2!
      • 1...Rxf3
        • 2.Bxf3#
      • 1...Rxd4
        • 2.Qa5#
      • 1...dxe5
        • 2.Qc5#
      • 1...Re4
        • 2.fxe4#
      • 1...Rg4
        • 2.fxg4#
      • 1...Rh4
        • 2.f4#
      • 1...Rf5
        • 2.f4#
      • 1...Rf6
        • 2.f4#
      • 1...Rf7
        • 2.f4#
      • 1...Rf8
        • 2.f4#
      • 1...Sd1
        • 2.Qc4#
      • 1...Sd3
        • 2.Qc4#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK,XP(E)::QAR(B)
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
    • P(d);N_GUARD,XS(F)::QAR1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT,XS(a)
      • Threat
        • QAB1(B)
      • Vars
        • R(b);SBLOCK,XP(E)::QAR(B)
        • P(d);N_GUARD,XS(F)::QAR1(B)
      • Refutation
        • R(b);XP(C)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
      • Refutation
        • K(c);P-FLIGHT,XP(E)
  • Actual
    • B(D);
    • Vars
      • R(b);OGATE,P_SPINR(b),XP(C)::B(D),XR(b)
      • R(b);SBLOCK,XP(E)::QAR(B)
      • P(d);N_GUARD,XS(F)::QAR1(B)
      • R(b);OGATE::P(C),XR(b)
      • R(b);OGATE::B(D)+P(C),XR(b)
      • R(b);OGATE::B(D)+P(C)
      • S(a);N_GUARD::QAB1(B)
      • S(a);N_GUARD::QAB1(B),XS(a)
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