MESON Chess Problem Database

Problem Display
PID: 141373 (8/8/BpPNPpP1/1N1k4/5PP1/B5K1/2P5/8 w - - 0 1)

Lehanka, G

Deutsche Zeitung Bohemia, 1930

8/8/BpPNPpP1/1N1k4/5PP1/B5K1/2P5/8

#2

11 + 3

14868 Pirnie Collection 2011
5454 Near Snap 2025

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Bb7#
  • Tries
    • 1.Bc8?
      • 1...Kxc6
        • 2.Bb7#
      • 1...f5!
    • 1.c4+?
      • 1...Kxc6
        • 2.Bb7#
      • 1...Kxe6!
    • 1.f5?
      • 1...Kxc6
        • 2.Bb7#
      • 1...Ke5!
  • Keys
    • 1.Sf5!
      • 1...Kc4
        • 2.Se3#
      • 1...Ke4
        • 2.Sc3#
      • 1...Kxc6
        • 2.Se7#
      • 1...Kxe6
        • 2.Sc7#

Anticipated by 59155(0000), 203529(1924)

This anticipates 184413(1947), 91835(1956)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);OGATEB,S_FLIGHT,XP(H)::B(G)
  • Tries
    • Try
      • B(G);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(H)::B(G)
      • Refutation
        • P(c);
    • Try
      • P(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XP(H)::B(G)
      • Refutation
        • K(a);S_FLIGHT,XP(J)
    • Try
      • P(D);
      • Vars
        • K(a);OGATEB,S_FLIGHT,XP(H)::B(G)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(I);
    • Vars
      • K(a);S_FLIGHT::S(I)
      • K(a);S_FLIGHT::S(F)
      • K(a);S_FLIGHT,XP(H)::S(I)
      • K(a);S_FLIGHT,XP(J)::S(F)
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