MESON Chess Problem Database

Problem Display
PID: 96521 (4R3/1K1N1p2/2B1np2/3p1P2/RBn1k1P1/1N4P1/4PP2/8 w - - 0 1)

Lipton, Michael

4th HM., Gazeta Czestochowska, 1966

(First published on Wed Sep 28 1966)

4R3/1K1N1p2/2B1np2/3p1P2/RBn1k1P1/1N4P1/4PP2/8

#2

12 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Bxd2#
    • 1...Sa3
      • 2.Bxa3#
    • 1...Se3
      • 2.f3#
    • 1...Sa5+
      • 2.Bxa5#
    • 1...Se5
      • 2.Sxf6#
    • 1...Sd6+
      • 2.Bxd6#
  • Tries
    • 1.Sd2+?
      • 1...Sxd2
        • 2.Bxd2#
      • 1...Kd4!
    • 1.Rxe6+?
      • 1...Se5
        • 2.Sdc5#
        • 2.Sxf6#
        • 2.Be1#
        • 2.Bd2#
        • 2.Ba3#
        • 2.Bc3#
        • 2.Ba5#
        • 2.Bc5#
        • 2.Bd6#
        • 2.Be7#
        • 2.Bf8#
      • 1...fxe6!
  • Keys
    • 1.Be7!
      • 1...Sc5+
        • 2.Bxc5#
      • 1...Sd8+
        • 2.Bxd8#
      • 1...Sd4
        • 2.Sbc5#
      • 1...Sf4
        • 2.Rxc4#
      • 1...Sg5
        • 2.Rxc4#
      • 1...Sc7
        • 2.Rxc4#
      • 1...Sg7
        • 2.Rxc4#
      • 1...Sf8
        • 2.Bxf8#
        • 2.Rxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 6
  • Sets
    • S(a);OGATEB::R(E)+B(F),XS(a)
    • S(a);SBLOCK::P(B)
    • S(a);CHECK,OGATEB::R(E)+B(F),XS(a)
    • S(a);N_SPINS(d),SBLOCK::S(K),XP(e)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(a);OGATE,XS(C)::R(E)+B(F),XS(a)
      • Refutation
        • K(b);N_SPINP(c),N_SPINS(d),P-FLIGHT
    • Try
      • R(L);CHECK,XS(d)
      • Refutation
        • P(f);XR(L)
  • Actual
    • B(F);N_PINS(d),P_PINS(a)
    • Vars
      • S(d);CHECK,OGATEB::R(L)+B(F),XS(d)
      • S(d);N_GUARD,N_SPINS(a),SBLOCK::S(C)
      • S(d);N_GUARD::R(E),XS(a)
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