MESON Chess Problem Database

Problem Display
PID: 188461 (4B3/8/2N5/ppp5/8/1kN5/1P2P3/1K6 w - - 0 1)

Perry, Lawrence

The Problemist, 1972

4B3/8/2N5/ppp5/8/1kN5/1P2P3/1K6

#2

6 + 4

56 The Problemist 1980

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Bf7#
    • 1...b4
      • 2.Sxa5#
  • Tries
    • 1.Bg6?
      • 1...Kc4
        • 2.Bf7#
      • 1...b4
        • 2.Sxa5#
      • 1...c4
        • 2.Bc2#
      • 1...a4!
  • Keys
    • 1.Se4!
      • 1...Ka4
        • 2.Sxc5#
      • 1...Kc4
        • 2.Bf7#
      • 1...a4
        • 2.Sd2#
      • 1...b4
        • 2.Sxa5#
      • 1...c4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(F)
    • P(c);SBLOCK::S(E),XP(b)
  • Tries
    • Try
      • B(F);
      • Vars
        • K(a);S_FLIGHT::B(F)
        • P(c);SBLOCK::S(E),XP(b)
        • P(d);SBLOCK::B(F)
      • Refutation
        • P(b);
  • Actual
    • S(D);
    • Vars
      • K(a);S_FLIGHT::S(D),XP(d)
      • K(a);S_FLIGHT::B(F)
      • P(b);SBLOCK::S(D)
      • P(c);SBLOCK::S(E),XP(b)
      • P(d);SBLOCK::S(D)
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