MESON Chess Problem Database

Problem Display
PID: 205718 (5K1n/8/5kBR/5N2/5P2/8/8/8 w - - 0 1)

Berhausen, Fritz

Chess Amateur (The), 1925

5K1n/8/5kBR/5N2/5P2/8/8/8

#2

5 + 2

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Se3?
      • 1...Ke6
        • 2.Bf5#
      • 1...Sf7
        • 2.Bxf7#
      • 1...Sxg6+!
    • 1.Sd4?
      • 1...Sf7
        • 2.Bxf7#
      • 1...Sxg6+!
    • 1.Sh4?
      • 1...Sxg6+
        • 2.Rxg6#
      • 1...Sf7
        • 2.Bxf7#
      • 1...Ke6!
    • 1.Sg7?
      • 1...Sf7
        • 2.Bxf7#
      • 1...Sxg6+!
  • Keys
    • 1.Se7!
      • 1...Sxg6+
        • 2.Rxg6#
      • 1...Ke6
        • 2.Bf5#
      • 1...Sf7
        • 2.Bxf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);
      • Vars
        • K(a);P-FLIGHT::R(D)+B(C),DCHECK
        • S(b);N_GUARD::R(D)+B(C),XS(b)
      • Refutation
        • S(b);CHECK,P_SPINS(b),XB(C)
    • Try
      • S(B);
      • Vars
        • S(b);N_GUARD::R(D)+B(C),XS(b)
      • Refutation
        • S(b);CHECK,P_SPINS(b),XB(C)
    • Try
      • S(B);
      • Vars
        • S(b);CHECK,OGATE,P_SPINS(b),XB(C)::R1(D),XS(b)
        • S(b);N_GUARD::R(D)+B(C),XS(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Vars
        • S(b);N_GUARD::R(D)+B(C),XS(b)
      • Refutation
        • S(b);CHECK,P_SPINS(b),XB(C)
  • Actual
    • S(B);
    • Vars
      • S(b);CHECK,OGATE,P_SPINS(b),XB(C)::R1(D),XS(b)
      • K(a);P-FLIGHT::R(D)+B(C),DCHECK
      • S(b);N_GUARD::R(D)+B(C),XS(b)
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