MESON Chess Problem Database

Problem Display
PID: 110669 (8/3K4/8/3k4/5P2/1NpBp3/2P1P3/3n1N2 w - - 0 1)

Hultberg, Gustav Herbert

Springaren, 1951

8/3K4/8/3k4/5P2/1NpBp3/2P1P3/3n1N2

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Sxe3#
    • 1...Sf2
      • 2.Sxe3#
  • Tries
    • 1.Bf5?
      • 1...Sb2
        • 2.Sxe3#
      • 1...Sf2
        • 2.Sxe3#
      • 1...Kc4!
    • 1.Bg6?
      • 1...Sb2
        • 2.Sxe3#
      • 1...Sf2
        • 2.Sxe3#
      • 1...Kc4!
    • 1.Bh7?
      • 1...Sb2
        • 2.Sxe3#
      • 1...Sf2
        • 2.Sxe3#
      • 1...Kc4!
  • Keys
    • 1.Sfd2!
      • threat
        • 2.Bc4#
        • 2.Be4#
      • 1...cxd2
        • 2.c4#
      • 1...exd2
        • 2.e4#
      • 1...Sb2
        • 2.Be4#
      • 1...Sf2
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(A),XP(c)
  • Tries
    • Try
      • B(E);
      • Vars
        • S(a);N_GUARD::S(A),XP(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(E);
      • Vars
        • S(a);N_GUARD::S(A),XP(c)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • B(E);
      • Vars
        • S(a);N_GUARD::S(A),XP(c)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • S(A);
    • Threat
      • DUALS(2)
    • Vars
      • P(b);OGATE,XS(A)::P(B)
      • P(c);OGATE,XS(A)::P(C)
      • S(a);::B(E)
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