MESON Chess Problem Database

Problem Display
PID: 102615 (4K1B1/1p1R1p2/3N3P/Rp1k2P1/1P3P2/P3Pn2/3P4/8 w - - 0 1)

Apro, Laszlo

Europe Echecs, 1968

4K1B1/1p1R1p2/3N3P/Rp1k2P1/1P3P2/P3Pn2/3P4/8

#2

12 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Bxf7#
  • Tries
    • 1.Sf5+?
      • 1...Kc4
        • 2.Bxf7#
      • 1...Ke4
        • 2.Sg3#
      • 1...Ke6
        • 2.Sg7#
      • 1...Kc6!
    • 1.Sxf7+?
      • 1...Kc4
        • 2.Se5#
        • 2.Sd8#
        • 2.Sh8#
      • 1...Ke4
        • 2.Bh7#
      • 1...Ke6
        • 2.Sd6#
      • 1...Kc6!
    • 1.Rxb5+?
      • 1...Ke6
        • 2.Bxf7#
        • 2.f5#
      • 1...Kc6!
  • Keys
    • 1.Sxb5+!
      • 1...Kc4
        • 2.Bxf7#
      • 1...Ke4
        • 2.Sc3#
      • 1...Kc6
        • 2.Rd6#
      • 1...Ke6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(b),P_SPINP(e),S_FLIGHT::B(L),XP(e)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(c);N_SPINP(b),P_SPINP(e),S_FLIGHT::B(L),XP(e)
        • K(c);N_SPINP(b),S_FLIGHT::S(H)
        • K(c);N_SPINP(b),P_SPINP(e),S_FLIGHT::S(H)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • S(H);CHECK,XP(e)
      • Vars
        • K(c);N_SPINP(b),S_FLIGHT::B(L)
        • K(c);N_SPINP(b),S_FLIGHT::B(L)+S(H)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • R(F);CHECK,P_PINP(e),XP(b)
      • Refutation
        • K(c);N_SPINP(e),S_FLIGHT
  • Actual
    • S(H);CHECK,P_PINP(e),XP(b)
    • Vars
      • K(c);S_FLIGHT::B(L),XP(e)
      • K(c);N_SPINP(e),S_FLIGHT::S(H)
      • K(c);N_SPINP(e),S_FLIGHT::R1(J)
      • K(c);S_FLIGHT::S(H)
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