MESON Chess Problem Database

Problem Display
PID: 222650 (8/3p4/P1kP4/p1B3P1/K1BP3Q/2p1rN2/2P4P/8 w - - 0 1)

McArthur, William Johnstone

English Mechanic and World of Science, 1884

(First published on Fri Feb 8 1884)

8/3p4/P1kP4/p1B3P1/K1BP3Q/2p1rN2/2P4P/8

#2

11 + 5

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Se5#
      • 2.Qe4#
    • 1...Rxf3
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Re5
      • 2.Sxe5#
  • Keys
    • 1.Qf2!
      • 1...Rxf3
        • 2.Qxf3#
        • 2.d5#
      • 1...Re1
        • 2.d5#
      • 1...Re2
        • 2.d5#
      • 1...Rd3
        • 2.Se5#
      • 1...Re4
        • 2.d5#
      • 1...Re5
        • 2.Sxe5#
      • 1...Re6
        • 2.d5#
      • 1...Re7
        • 2.d5#
      • 1...Re8
        • 2.d5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD,XS(C)::QAB(G)
    • R(b);N_GUARD::QAB(G),XR(b)
    • R(b);N_GUARD::S(C),XR(b)
  • Actual
    • Q(G);
    • Vars
      • R(b);::P(F)
      • R(b);N_GUARD::S(C)
      • R(b);N_GUARD::S(C),XR(b)
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