MESON Chess Problem Database

Problem Display
PID: 210072 (8/8/8/5N2/4p2K/R1p1p1B1/2RPk3/8 w - - 0 1)

Hoffmann, Peter

Deutsche Schachblatter, 1981

8/8/8/5N2/4p2K/R1p1p1B1/2RPk3/8

#2

6 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.dxc3+?
      • 1...Kd1
        • 2.Sxe3#
      • 1...Kf1
        • 2.Ra1#
      • 1...Kf3
        • 2.Sd4#
      • 1...Kd3!
    • 1.dxe3+?
      • 1...Kf1
        • 2.Ra1#
      • 1...Kd3
        • 2.Raxc3#
      • 1...Kf3
        • 2.Rf2#
      • 1...Kd1!
    • 1.d4+?
      • 1...Kd1
        • 2.Sxe3#
      • 1...Kf1
        • 2.Ra1#
      • 1...Kd3
        • 2.Raxc3#
      • 1...Kf3!
  • Keys
    • 1.d3+!
      • 1...Kd1
        • 2.Sxe3#
      • 1...Kf1
        • 2.Ra1#
      • 1...Kxd3
        • 2.Raxc3#
      • 1...Kf3
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(B);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::S(F),XP(c)
        • K(a);S_FLIGHT::R(C)
        • K(a);S_FLIGHT::S(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(B);CHECK,XP(c)
      • Vars
        • K(a);S_FLIGHT::R(C)
        • K(a);P_SPINP(b),S_FLIGHT::R1(C),XP(b)
        • K(a);OGATE,S_FLIGHT::R1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(a);S_FLIGHT::S(F),XP(c)
        • K(a);S_FLIGHT::R(C)
        • K(a);P_SPINP(b),S_FLIGHT::R1(C),XP(b)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • P(B);CHECK
    • Vars
      • K(a);S_FLIGHT::S(F),XP(c)
      • K(a);S_FLIGHT::R(C)
      • K(a);P_SPINP(b),S_FLIGHT,XP(B)::R1(C),XP(b)
      • K(a);S_FLIGHT::S(F)
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