MESON Chess Problem Database

Problem Display
PID: 165402 (1B6/4bQ1B/R3r3/1KPkNp1p/2pp3r/1Np1p3/1P1Rn3/1q6 w - - 0 1)

Knuppert, Hugo

1st Prize, Sahovski Glasnik, 1961

1B6/4bQ1B/R3r3/1KPkNp1p/2pp3r/1Np1p3/1P1Rn3/1q6

#2

10 + 12

133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe6#
    • 1...Re4
      • 2.Qxe6#
    • 1...Sf4
      • 2.Rxd4#
    • 1...f4
      • 2.Qxe6#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qxf5#
      • 1...Re4
        • 2.Sb4#
      • 1...Bd6
        • 2.Qb7#
      • 1...Sf4!
    • 1.Sg4?
      • threat
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qxf5#
      • 1...Bd6
        • 2.Qb7#
      • 1...Sf4
        • 2.Rxd4#
      • 1...Qe4!
    • 1.Sg6?
      • threat
        • 2.Qxe6#
      • 1...Qe4
        • 2.Sxe7#
      • 1...Re4
        • 2.Sxe7#
      • 1...Bd6
        • 2.Qb7#
      • 1...Sf4
        • 2.Rxd4#
      • 1...Ke4!
    • 1.Sd7?
      • threat
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qxf5#
      • 1...Qe4
        • 2.Sb6#
      • 1...Re4
        • 2.Sb6#
      • 1...Sf4
        • 2.Rxd4#
      • 1...Bd6!
    • 1.Bxf5?
      • threat
        • 2.Qxe6#
      • 1...Sf4
        • 2.Rxd4#
      • 1...Qxf5!
  • Keys
    • 1.Sxc4!
      • threat
        • 2.Qxe6#
      • 1...Ke4
        • 2.Qxf5#
      • 1...Qe4
        • 2.Sb6#
      • 1...Re4
        • 2.Sb6#
      • 1...Bd6
        • 2.Qb7#
      • 1...Sf4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);SBLOCK::QAB1(H),XR(k)
    • R(g);SBLOCK::QAB1(H),XR(k)
    • S(b);N_GUARD,S_CUTR(g)::R1(B),XP(f)
    • P(i);::QAB1(H),XR(k)
  • Tries
    • Try
      • S(F);N_PINP(f)
      • Threat
        • QAB1(H),XR(k)
      • Vars
        • K(h);N_SPINR(k),P_SPINP(i),S_FLIGHT::QAB1(H),XP(i)
        • R(g);SBLOCK::S(F)
        • B(l);OGATE::QAB(H)
      • Refutation
        • S(b);
    • Try
      • S(F);
      • Threat
        • QAB1(H),XR(k)
      • Vars
        • K(h);N_SPINP(f),N_SPINR(k),P_SPINP(i),S_FLIGHT::QAB1(H),XP(i)
        • B(l);OGATE::QAB(H)
        • S(b);N_GUARD::R1(B),XP(f)
      • Refutation
        • Q(a);
    • Try
      • S(F);
      • Threat
        • QAB1(H),XR(k)
      • Vars
        • Q(a);SBLOCK::S(F),XB(l)
        • R(g);SBLOCK::S(F),XB(l)
        • B(l);OGATE::QAB(H)
        • S(b);N_GUARD,S_CUTR(g)::R1(B),XP(f)
      • Refutation
        • K(h);N_SPINP(f),N_SPINR(k),S_FLIGHT
    • Try
      • S(F);
      • Threat
        • QAB1(H),XR(k)
      • Vars
        • K(h);N_SPINP(f),N_SPINR(k),P_SPINP(i),S_FLIGHT::QAB1(H),XP(i)
        • Q(a);SBLOCK::S(F)
        • R(g);SBLOCK::S(F)
        • S(b);N_GUARD,S_CUTR(g)::R1(B),XP(f)
      • Refutation
        • B(l);
    • Try
      • B(I);XP(i)
      • Threat
        • QAB1(H),XR(k)
      • Vars
        • S(b);N_GUARD,S_CUTR(g)::R1(B),XP(f)
      • Refutation
        • Q(a);XB(I)
  • Actual
    • S(F);XP(e)
    • Threat
      • QAB1(H),XR(k)
    • Vars
      • K(h);N_SPINP(f),N_SPINR(k),P_SPINP(i),S_FLIGHT::QAB1(H),XP(i)
      • Q(a);SBLOCK::S(F)
      • R(g);SBLOCK::S(F)
      • B(l);OGATE::QAB(H)
      • S(b);N_GUARD,S_CUTR(g)::R1(B),XP(f)
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