MESON Chess Problem Database

Problem Display
PID: 48036 (7K/5B2/7k/8/3pP1R1/R4P2/4b2N/5r2 w - - 0 1)

Nanning, Frederik Willem

Die Schwalbe, 1932

7K/5B2/7k/8/3pP1R1/R4P2/4b2N/5r2

#2

7 + 4

3310 2345 Chess Problems 1997
136 Problem Observer 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Ra6#
    • 1...Bxf3
      • 2.Ra6#
    • 1...Ba6
      • 2.Rxa6#
    • 1...d3
      • 2.Ra6#
  • Tries
    • 1.Ra5?
      • threat
        • 2.Rh4#
        • 2.Rg6#
        • 2.Rh5#
      • 1...Bxf3
        • 2.Rg6#
        • 2.Rh5#
        • 2.Ra6#
      • 1...Rg1
        • 2.Rh4#
        • 2.Rh5#
      • 1...Bb5!
    • 1.Rg7?
      • threat
        • 2.Sg4#
      • 1...Bxf3
        • 2.Ra6#
      • 1...Rg1!
    • 1.Rg8?
      • threat
        • 2.Sg4#
      • 1...Bxf3
        • 2.Ra6#
      • 1...Rg1!
  • Keys
    • 1.f4!
      • threat
        • 2.Rh3#
      • 1...Bxg4
        • 2.Sxg4#
      • 1...Rf3
        • 2.Rh4#
      • 1...Bd3
        • 2.Rh4#
      • 1...Bf3
        • 2.Ra6#
      • 1...d3
        • 2.Ra6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(b);N_GUARD::R(B)
    • B(b);N_GUARD,XP(C)::R(B)
    • B(b);N_GUARD::R(B),XB(b)
    • P(c);S_CUTB(b)::R(B)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Refutation
        • B(b);
    • Try
      • R(E);
      • Threat
        • S(A)
      • Vars
        • B(b);N_GUARD,XP(C)::R(B)
      • Refutation
        • R(a);
    • Try
      • R(E);
      • Threat
        • S(A)
      • Vars
        • B(b);N_GUARD,XP(C)::R(B)
      • Refutation
        • R(a);
  • Actual
    • P(C);
    • Threat
      • R(B)
    • Vars
      • B(b);XR(E)::S(A),XB(b)
      • R(a);S_CUTB(b)::R(E)
      • B(b);N_GUARD::R(E)
      • B(b);N_GUARD::R(B)
      • P(c);S_CUTB(b)::R(B)
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