MESON Chess Problem Database

Problem Display
PID: 227985 (1K6/3N4/k2N4/3p4/1PnP4/P7/7R/5B2 w - - 0 1)

Pieper, Peter

2nd HM., Kieler Schachgesellschaft, 1970

1K6/3N4/k2N4/3p4/1PnP4/P7/7R/5B2

#2

8 + 3

16882 KSG-Problemschach 1969-1987 (Muck/Laue) 1993
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Sb2#
        • 2.Sd2#
        • 2.Se3#
        • 2.Sa5#
        • 2.Sce5#
        • 2.Scb6#
        • 2.Sd6#
      • 1...dxc4
        • 2.Bxc4#
      • 1...Kb5!
    • 1.Se4?
      • 1...dxe4
        • 2.Bxc4#
      • 1...Kb5!
  • Keys
    • 1.Re2!
      • 1...Sxa3
        • 2.Ra2#
      • 1...Sxd6
        • 2.Re6#
      • 1...Sb2
        • 2.Rxb2#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sa5
        • 2.b5#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sb6
        • 2.Sc5#

Anticipated by 140100(1916), 58111(1928), 140101(1938), 157162(1946), 145956(1951)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);XS(a)
      • Threat
        • DUALS(7)
      • Vars
        • P(b);OGATE,P_SPINP(b),XS(F)::B(A),XP(b)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(F);
      • Vars
        • P(b);N_GUARD,XS(F)::B(A),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(B);N_PINS(a)
    • Vars
      • S(a);OGATEB,XP(C)::B(A)+R(B)
      • S(a);OGATEB,XS(F)::B(A)+R(B)
      • S(a);OGATEB::B(A)+R(B),XS(a)
      • S(a);SBLOCK::P(D)
      • S(a);SBLOCK::S(G)
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