MESON Chess Problem Database

Problem Display
PID: 247257 (5K2/1P1Rp3/R1N1k3/B3Pp2/7p/7B/8/8 w - - 0 1)

Sommer, Bruno Oswald

Die Schwalbe, 1929

5K2/1P1Rp3/R1N1k3/B3Pp2/7p/7B/8/8

#2

8 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd7
      • 2.Sb8#
  • Tries
    • 1.Sb4+?
      • 1...Kxd7
        • 2.e6#
      • 1...Kxe5!
    • 1.Sd4+?
      • 1...Kxd7
        • 2.e6#
      • 1...Kxe5!
    • 1.Sa7+?
      • 1...Kxd7
        • 2.e6#
        • 2.b8S#
      • 1...Kxe5!
    • 1.Sxe7+?
      • 1...Kxd7
        • 2.Bxf5#
        • 2.Rd6#
        • 2.e6#
        • 2.b8S#
      • 1...Kxe5!
    • 1.Sd8+?
      • 1...Kxd7
        • 2.e6#
      • 1...Kxe5!
    • 1.Bf1?
      • 1...Kxd7
        • 2.Sb8#
      • 1...f4
        • 2.Bh3#
      • 1...h3!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Rxe7#
      • 1...Kxd7
        • 2.Sb8#
      • 1...f4
        • 2.Bh3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XR(G)::S(E)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(G)::P(C)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XP(C)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(G)::P(C)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XP(C)
    • Try
      • S(E);CHECK
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XP(C)
    • Try
      • S(E);CHECK,XP(d)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XP(C)
    • Try
      • S(E);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(G)::P(C)
      • Refutation
        • K(c);N_SPINP(b),P-FLIGHT,XP(C)
    • Try
      • B(A);N_PINP(b)
      • Vars
        • K(c);S_FLIGHT,XR(G)::S(E)
        • P(b);OGATEB::B(A)
      • Refutation
        • P(a);
  • Actual
    • B(A);N_PINP(b)
    • Threat
      • R1(G),XP(d)
    • Vars
      • K(c);S_FLIGHT,XR(G)::S(E)
      • P(b);OGATEB::B(A)
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