MESON Chess Problem Database

Problem Display
PID: 84457 (4R3/5p2/R1K1bk1B/8/2Np3N/3P4/8/8 w - - 0 1)

Funk, Jacob E

Good Companions, 1919

4R3/5p2/R1K1bk1B/8/2Np3N/3P4/8/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5+
      • 2.Kxd5#
    • 1...Bd7+
      • 2.Kxd7#
  • Tries
    • 1.Se3?
      • 1...Bd5+
        • 2.Kxd5#
        • 2.Sxd5#
      • 1...Bd7+
        • 2.Kxd7#
      • 1...Ke5
        • 2.Sg4#
      • 1...Bh3
        • 2.Sd5#
      • 1...Ba2
        • 2.Sg4#
      • 1...Bb3
        • 2.Sg4#
      • 1...Bc4
        • 2.Sg4#
      • 1...Bg4
        • 2.Sxg4#
        • 2.Sd5#
      • 1...Bf5
        • 2.Sd5#
      • 1...Bc8
        • 2.Sd5#
      • 1...dxe3!
  • Keys
    • 1.Sb6!
      • 1...Bd5+
        • 2.Sxd5#
      • 1...Bd7+
        • 2.Sxd7#
      • 1...Ke5
        • 2.Sd7#
      • 1...Bh3
        • 2.Sd5#
      • 1...Ba2
        • 2.Sd7#
      • 1...Bb3
        • 2.Sd7#
      • 1...Bc4
        • 2.Sd7#
      • 1...Bg4
        • 2.Sd5#
      • 1...Bf5
        • 2.Sd5#
      • 1...Bc8
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK::R(D)+K(E),XB(b)
  • Tries
    • Try
      • S(B);
      • Vars
        • B(b);CHECK::R(D)+K(E),XB(b)
        • K(c);P_SPINB(b),S_FLIGHT::S(B)
        • B(b);N_GUARD::S(B)
      • Refutation
        • P(a);XS(B)
  • Actual
    • S(B);
    • Vars
      • B(b);CHECK,N_GUARD::S(B),XB(b)
      • K(c);P_SPINB(b),S_FLIGHT::S(B)
      • B(b);N_GUARD::S(B)
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