MESON Chess Problem Database

Problem Display
PID: 52674 (1KB5/1p3pb1/Q1b3pR/2ppk3/4N2P/2p3p1/4R1P1/4B3 w - - 0 1)

Foster, Geoffrey R

The Problemist, 2003

1KB5/1p3pb1/Q1b3pR/2ppk3/4N2P/2p3p1/4R1P1/4B3

#2

9 + 10

56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Bxc3#
    • 1...Kf4
      • 2.Bxg3#
  • Tries
    • 1.Sf2+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Kf4
        • 2.Sd3#
        • 2.Sh3#
      • 1...Kf6
        • 2.Sg4#
      • 1...Kd6!
    • 1.Sxc3+?
      • 1...Kf4
        • 2.Bd2#
      • 1...Kd6
        • 2.Sb5#
      • 1...Kf6
        • 2.Sxd5#
      • 1...Kd4!
    • 1.Sxg3+?
      • 1...Kd4
        • 2.Bf2#
      • 1...Kd6
        • 2.Sf5#
      • 1...Kf6
        • 2.Sh5#
      • 1...Kf4!
    • 1.Sxc5+?
      • 1...Kd4
        • 2.Sb3#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd6
        • 2.Sxb7#
      • 1...Kf6!
  • Keys
    • 1.Sg5+!
      • 1...Kd4
        • 2.Sf3#
      • 1...Kf4
        • 2.Sh3#
      • 1...Kd6
        • 2.Sxf7#
      • 1...Kf6
        • 2.Sh7#

This is after 10008

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(e);S_FLIGHT::B(A),XP(a)
    • K(e);S_FLIGHT::B(A),XP(b)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(F)
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D)
      • Refutation
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT
    • Try
      • S(D);CHECK,XP(a)
      • Vars
        • K(e);S_FLIGHT::B(A)
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D)
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D),XP(d)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(D);CHECK,XP(b)
      • Vars
        • K(e);S_FLIGHT::B(A)
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(D);CHECK,XP(c)
      • Vars
        • K(e);S_FLIGHT::S(D)
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D),XP(h)
      • Refutation
        • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT
  • Actual
    • S(D);CHECK
    • Vars
      • K(e);S_FLIGHT::S(D)
      • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D),XP(i)
      • K(e);P_SPINB(f),P_SPINP(g),S_FLIGHT::S(D)
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