MESON Chess Problem Database

Problem Display
PID: 150645 (1r6/r7/p2p4/2pB3R/3kPP2/3PnKb1/N3P3/3n2Q1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 2013

1r6/r7/p2p4/2pB3R/3kPP2/3PnKb1/N3P3/3n2Q1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qxe3#
    • 1...Sc3
      • 2.Qxe3#
  • Tries
    • 1.Bb3?
      • threat
        • 2.Rd5#
      • 1...Sf2
        • 2.Qa1#
      • 1...Sc3
        • 2.Qxe3#
      • 1...d5
        • 2.Rxd5#
      • 1...Bf2!
    • 1.Bf7?
      • threat
        • 2.Rd5#
      • 1...Bf2
        • 2.Qg7#
      • 1...Sc3
        • 2.Qxe3#
      • 1...d5
        • 2.Rxd5#
      • 1...Sf2!
  • Keys
    • 1.Bb7!
      • threat
        • 2.Rd5#
      • 1...Bf2
        • 2.Qg7#
      • 1...Sf2
        • 2.Qa1#
      • 1...Sc3
        • 2.Qxe3#
      • 1...d5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • B(H);
      • Threat
        • R1(I)
      • Vars
        • S(a);N_SPINS(b),OGATE::QAB(A)
        • S(a);N_GUARD::QAB1(A),XS(b)
        • P(g);::R1(I),XP(g)
      • Refutation
        • B(c);N_SPINS(b)
    • Try
      • B(H);
      • Threat
        • R1(I)
      • Vars
        • B(c);N_SPINS(b),OGATE::QAB(A)
        • S(a);N_GUARD::QAB1(A),XS(b)
        • P(g);::R1(I),XP(g)
      • Refutation
        • S(a);N_SPINS(b)
  • Actual
    • B(H);
    • Threat
      • R1(I)
    • Vars
      • B(c);N_SPINS(b),OGATE::QAB(A)
      • S(a);N_SPINS(b),OGATE::QAB(A)
      • S(a);N_GUARD::QAB1(A),XS(b)
      • P(g);::R1(I),XP(g)
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