MESON Chess Problem Database

Problem Display
PID: 230876 (8/B7/1R1qpN1P/4k3/3N4/6P1/1PQ4K/8 w - - 0 1)

Holt, Locke

Preston Guardian, 1882

(First published on Tue Jun 6 1882)

8/B7/1R1qpN1P/4k3/3N4/6P1/1PQ4K/8

#2

9 + 3

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qc3#
    • 1...Qa3
      • 2.Rxe6#
    • 1...Qb4
      • 2.Rxe6#
    • 1...Qc7
      • 2.Rxe6#
    • 1...Qb8
      • 2.Rxe6#
    • 1...Qf8
      • 2.Rxe6#
    • 1...Qd8
      • 2.Rxe6#
  • Tries
    • 1.Sg4+?
      • 1...Kxd4
        • 2.Rxd6#
      • 1...Kd5!
    • 1.Rxd6?
      • threat
        • 2.Rxe6#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Kxf6!
    • 1.Qf5+?
      • 1...Kxd4
        • 2.Rb4#
      • 1...exf5!
    • 1.Qc1?
      • threat
        • 2.Qf4#
      • 1...Kxd4
        • 2.Qc3#
      • 1...Qxd4
        • 2.Qg5#
      • 1...Kxf6!
    • 1.Qd2?
      • threat
        • 2.Qf4#
      • 1...Qxd4
        • 2.Qg5#
      • 1...Kxf6!
    • 1.Qe2+?
      • 1...Kxd4
        • 2.Rb4#
        • 2.Rxd6#
      • 1...Kxf6!
  • Keys
    • 1.Qc7!
      • 1...Kxd4
        • 2.Qc3#
      • 1...Kxf6
        • 2.Qg7#
      • 1...Qxc7
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(a);OGATEB,P_PINP(D),S_FLIGHT,XS(E)::QAB1(B)
    • Q(b);OGATE::R1(F),XP(c)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(a);P_PINP(D),S_FLIGHT,XS(E)::B(I)+R(F),DCHECK,XQ(b)
      • Refutation
        • K(a);P-FLIGHT,P_PINP(D)
    • Try
      • R(F);XQ(b)
      • Threat
        • R1(F),XP(c)
      • Vars
        • K(a);S_FLIGHT,XR(F)::QAB1(B)
      • Refutation
        • K(a);P_SPINP(c),S_FLIGHT,XS(G)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P_PINP(D),S_FLIGHT,XS(E)::B(I)+R(F),DCHECK
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);OGATEB,P_PINP(D),S_FLIGHT,XS(E)::QAB1(B)
        • Q(b);SBLOCK,XS(E)::QAR2(B)
      • Refutation
        • K(a);P_PINP(D),S_FLIGHT,XS(G)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • Q(b);SBLOCK,XS(E)::QAR2(B)
      • Refutation
        • K(a);P_PINP(D),S_FLIGHT,XS(G)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P_PINP(D),S_FLIGHT,XS(G)
  • Actual
    • Q(B);P_PINQ(b)
    • Vars
      • K(a);N_SPINQ(b),OGATEB,P_PINP(D),S_FLIGHT,XS(E)::QAB1(B)
      • K(a);N_SPINQ(b),OGATEB,P_PINP(D),S_FLIGHT,XS(G)::QAB1(B)
      • Q(b);N_SPINQ(b),OGATE,XQ(B)::R1(F),XP(c)
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