MESON Chess Problem Database

Problem Display
PID: 153386 (8/8/4kB2/2K1NR1r/8/8/2nN4/5Q2 w - - 0 1)

Berd, Benjamin M

Good Companions (January Meredith Ty.), 1916

8/8/4kB2/2K1NR1r/8/8/2nN4/5Q2

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Qa6#
  • Tries
    • 1.Rxh5?
      • threat
        • 2.Qa6#
        • 2.Qf5#
      • 1...Se3
        • 2.Qa6#
      • 1...Sb4
        • 2.Qf5#
      • 1...Sd4!
  • Keys
    • 1.Sdf3!
      • 1...Kxf5
        • 2.Sg5#
      • 1...Rxf5
        • 2.Qa6#
      • 1...Rh1
        • 2.Sg5#
      • 1...Rh2
        • 2.Sg5#
      • 1...Rh3
        • 2.Sg5#
      • 1...Rh4
        • 2.Sg5#
      • 1...Rg5
        • 2.Sxg5#
      • 1...Rh6
        • 2.Sg5#
      • 1...Rh7
        • 2.Sg5#
      • 1...Rh8
        • 2.Sg5#
      • 1...Sa1
        • 2.Sd4#
      • 1...Se1
        • 2.Sd4#
      • 1...Sa3
        • 2.Sd4#
      • 1...Se3
        • 2.Sd4#
      • 1...Sb4
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 15
    • REMOVED MATES = 0
  • Sets
    • R(b);P_PINS(D),SBLOCK,XR(E)::QAR(A)
  • Tries
    • Try
      • R(E);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR(A)
        • S(a);::QAB1(A)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Vars
      • K(c);S_FLIGHT,XR(E)::QAR(A)+S(B)
      • R(b);P_PINS(D),SBLOCK,XR(E)::QAR(A)
      • R(b);N_GUARD::S(B)
      • R(b);N_GUARD::S(B),XR(b)
      • S(a);N_GUARD::S(B)
      • S(a);N_GUARD::S(B),XS(a)
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