MESON Chess Problem Database

Problem Display
PID: 231015 (8/4p3/1P2P3/B3kP2/1N2p2P/4N3/2P3K1/R5Q1 w - - 0 1)

Collins, Francis Charles

English Mechanic and World of Science, 1879

(First published on Fri Nov 7 1879)

8/4p3/1P2P3/B3kP2/1N2p2P/4N3/2P3K1/R5Q1

#2

11 + 3

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Sc4#
  • Tries
    • 1.Sc6+?
      • 1...Kf4
        • 2.Rf1#
        • 2.Qf2#
      • 1...Kf6
        • 2.Bc3#
      • 1...Kd6!
    • 1.Ra3?
      • 1...Kf4
        • 2.Qh2#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Qa1#
      • 1...Kd4!
    • 1.Qd1?
      • 1...Kf6
        • 2.Qd4#
      • 1...Kf4!
  • Keys
    • 1.Ra4!
      • 1...Kd4
        • 2.Sd3#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd6
        • 2.Sc4#
      • 1...Kf6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(E)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(b);S_FLIGHT::B(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(A);
      • Vars
        • K(b);S_FLIGHT::QAB(B)
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAB(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(b);S_FLIGHT::R(A)+S(F)
      • K(b);S_FLIGHT::S(F)
      • K(b);S_FLIGHT::S(E)
      • K(b);S_FLIGHT::QAB(B)
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