MESON Chess Problem Database

Problem Display
PID: 208121 (2K5/2N5/2p2P2/P1kpp3/3R3Q/8/3N4/8 w - - 0 1)

Collins, Francis Charles

Land and Water, 1874

(First published on Sat Sep 5 1874)

2K5/2N5/2p2P2/P1kpp3/3R3Q/8/3N4/8

#2

7 + 4

15239 Valois Notebooks 2020
6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Se4#
  • Tries
    • 1.Qh3?
      • 1...Kxd4
        • 2.Se6#
      • 1...Kd6
        • 2.Se4#
      • 1...exd4
        • 2.Qa3#
      • 1...e4!
    • 1.Qe4?
      • 1...dxe4
        • 2.Sb3#
      • 1...exd4
        • 2.Qe7#
      • 1...Kd6!
    • 1.f7?
      • threat
        • 2.f8Q#
        • 2.f8B#
      • 1...Kd6
        • 2.Se4#
        • 2.f8Q#
        • 2.f8B#
      • 1...exd4
        • 2.Qe7#
        • 2.f8Q#
        • 2.f8B#
      • 1...e4!
  • Keys
    • 1.Qg3!
      • 1...Kxd4
        • 2.Se6#
      • 1...Kd6
        • 2.Se4#
      • 1...exd4
        • 2.Qa3#
      • 1...e4
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P_SPINP(b),S_FLIGHT::S(A)
  • Tries
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT,XR(B)::S(F)
        • K(a);P_SPINP(b),S_FLIGHT::S(A)
        • P(c);SBLOCK,XR(B)::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • P(b);XQ(C)::S(A)
        • P(c);OGATE,SBLOCK,XR(B)::QAB(C)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • P(E);
      • Threat
        • P=Q
      • Refutation
        • P(c);
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT,XR(B)::S(F)
      • K(a);P_SPINP(b),S_FLIGHT::S(A)
      • P(c);SBLOCK,XR(B)::QAB(C)
      • P(c);::S(A)
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