MESON Chess Problem Database

Problem Display
PID: 141740 (2R3B1/4p3/K3P1p1/p1Pk1qQn/3B1P2/1PPNRP2/p2pr3/8 w - - 0 1)

Knuppert, Hugo

1st Prize, Main-Post, 1973-1974

2R3B1/4p3/K3P1p1/p1Pk1qQn/3B1P2/1PPNRP2/p2pr3/8

#2

13 + 9

259 Thema Danicum 1976
102 Probleemblad 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.Qxe5#
    • 1...Sxf4
      • 2.Sxf4#
    • 1...a4
      • 2.Sb4#
  • Tries
    • 1.Se5?
      • threat
        • 2.Rd8#
      • 1...Qd3+
        • 2.Sxd3#
      • 1...Qxe6+
        • 2.Sc6#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Qf7
        • 2.Sxf7#
      • 1...Qf8
        • 2.Sf7#
      • 1...Sf6!
    • 1.Bf6?
      • threat
        • 2.c4#
      • 1...exf6
        • 2.e7#
      • 1...Qe5
        • 2.Qxe5#
      • 1...Sxf6!
    • 1.Qxe7?
      • threat
        • 2.Qd6#
        • 2.Qd8#
        • 2.Qb7#
        • 2.Qd7#
      • 1...Qxe6+
        • 2.Bxe6#
        • 2.Qd6#
        • 2.Qxe6#
      • 1...Qxf4
        • 2.Qb7#
      • 1...Sf6
        • 2.Qd6#
        • 2.Qb7#
      • 1...Qe5
        • 2.Qb7#
      • 1...Qg5
        • 2.Qxg5#
        • 2.Qd6#
        • 2.Qb7#
        • 2.Qd7#
      • 1...Qf6
        • 2.Qd6#
        • 2.Qb7#
        • 2.Qd7#
      • 1...Qf7
        • 2.Qd6#
      • 1...Qf8
        • 2.Qb7#
      • 1...Qxd3+!
  • Keys
    • 1.Be5!
      • threat
        • 2.c4#
      • 1...Qxd3+
        • 2.Rxd3#
      • 1...Qxe6+
        • 2.Bd6#
      • 1...Qxf4
        • 2.Bxf4#
      • 1...Qxe5
        • 2.Qxe5#
      • 1...Qf7
        • 2.Bf6#
      • 1...Qe4
        • 2.fxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • Q(f);OGATE::QAR1(I),XQ(f)
    • S(g);XP(G)::S(C),XS(g)
    • P(d);N_GUARD::S(C)
  • Tries
    • Try
      • S(C);N_PINQ(f)
      • Threat
        • R(L)
      • Vars
        • Q(f);CHECK::QAR(I)+S(C),XQ(f)
        • Q(f);CHECK,P_SPINQ(f),XP(K)::QAR(I)+S(C)
        • Q(f);OGATE,P_SPINQ(f),XS(C)::QAR1(I),XQ(f)
        • Q(f);::QAR(I)+S(C),XQ(f)
        • Q(f);::QAR(I)+S(C)
      • Refutation
        • S(g);
    • Try
      • B(F);
      • Threat
        • P(B)
      • Vars
        • P(i);OGATE,XB(F)::B(M)+P(K)
        • Q(f);OGATE::QAR1(I),XQ(f)
      • Refutation
        • S(g);XB(F)
    • Try
      • Q(I);N_PINQ(f),XP(i)
      • Threat
        • DUALS(4)
      • Vars
        • Q(f);XP(G)::QAB(I)
        • Q(f);::QAB(I)
        • Q(f);::QAR1(I)
      • Refutation
        • Q(f);CHECK,XS(C)
  • Actual
    • B(F);N_PINQ(f)
    • Threat
      • P(B)
    • Vars
      • Q(f);CHECK,OGATE,XS(C)::R(D),XQ(f)
      • Q(f);CHECK,OGATEB,P_SPINQ(f),XP(K)::QAR(I)+B(F)
      • Q(f);OGATE,XP(G)::QAR(I)+B(F),XQ(f)
      • Q(f);OGATE,P_SPINQ(f),XB(F)::QAR1(I),XQ(f)
      • Q(f);OGATEB::QAR(I)+B(F)
      • Q(f);OGATE::P(E),XQ(f)
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Developed and maintained by Brian Stephenson.
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