MESON Chess Problem Database

Problem Display
PID: 210143 (4k1K1/1N2b2R/nNP3P1/3pn1pB/Q7/8/4q3/8 w - - 0 1)

Kohring, Rolf

Badische Neueste Nachrichten, 1992

4k1K1/1N2b2R/nNP3P1/3pn1pB/Q7/8/4q3/8

#2

8 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bd8
      • 2.Sd6#
    • 1...Sd3
      • 2.c7#
    • 1...Sf3
      • 2.g7#
    • 1...Sc4
      • 2.c7#
    • 1...Sg4
      • 2.g7#
    • 1...Sxc6
      • 2.Qxc6#
    • 1...Sxg6
      • 2.Bxg6#
    • 1...Sd7
      • 2.cxd7#
    • 1...Sf7
      • 2.gxf7#
  • Tries
    • 1.c7+?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Qb5!
    • 1.g7+?
      • 1...Sg6
        • 2.Bxg6#
      • 1...Sf7
        • 2.Bxf7#
      • 1...Qxh5!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Rxe7#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Sxg6
        • 2.Bxg6#
      • 1...Ba3
        • 2.Sf6#
      • 1...Bb4
        • 2.Sf6#
      • 1...Bc5
        • 2.Sf6#
      • 1...Bd6
        • 2.Sf6#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Bd8
        • 2.Sd6#
      • 1...Bf8
        • 2.Sf6#
      • 1...Sd3
        • 2.c7#
      • 1...Sf3
        • 2.g7#
      • 1...Sc4
        • 2.c7#
      • 1...Sg4
        • 2.g7#
      • 1...Sd7
        • 2.cxd7#
      • 1...Sf7
        • 2.gxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(f);N_GUARD,SBLOCK::S(F)
    • S(c);N_GUARD,S_CUTQ(a)::QAB(A)+P(D)
    • S(c);N_GUARD,S_CUTQ(a)::B(B)+P(E)
    • S(c);OGATE,P_SPINS(c),XP(D)::QAB(A),XS(c)
    • S(c);OGATE,P_SPINS(c),XP(E)::B(B),XS(c)
    • S(c);OGATE::P(D),XS(c)
    • S(c);OGATE::P(E),XS(c)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAB(A),XS(c)
        • S(c);N_GUARD,P_SPINS(c)::QAB1(A),XS(c)
      • Refutation
        • Q(a);P_SPINQ(a)
    • Try
      • P(E);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::B(B),XS(c)
      • Refutation
        • Q(a);XB(B)
  • Actual
    • S(C);XP(b)
    • Threat
      • R1(G),XB(f)
    • Vars
      • S(c);OGATE,P_SPINS(c),XP(D)::QAB(A),XS(c)
      • S(c);OGATE,P_SPINS(c),XP(E)::B(B),XS(c)
      • B(f);N_GUARD::S(C)
      • B(f);N_GUARD::S(C),XB(f)
      • B(f);N_GUARD,SBLOCK::S(F)
      • S(c);N_GUARD,S_CUTQ(a)::QAB(A)+P(D)
      • S(c);N_GUARD,S_CUTQ(a)::B(B)+P(E)
      • S(c);OGATE::P(D),XS(c)
      • S(c);OGATE::P(E),XS(c)
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