MESON Chess Problem Database

Problem Display
PID: 237269 (2Q5/1K6/1p1N1b2/2Pk1r1R/2p1pB2/2qrPn2/8/3R4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2015

2Q5/1K6/1p1N1b2/2Pk1r1R/2p1pB2/2qrPn2/8/3R4

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...bxc5
      • 2.Qg8#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Qc6#
      • 1...Se5
        • 2.Sxc3#
      • 1...Sd4!
    • 1.Sxf5?
      • threat
        • 2.Se7#
        • 2.Qc6#
      • 1...Qe5
        • 2.Qc6#
      • 1...Be7
        • 2.Sxe7#
        • 2.Qc6#
      • 1...Sd4
        • 2.Se7#
      • 1...Sg5
        • 2.Qc6#
      • 1...Se5!
    • 1.Se8?
      • threat
        • 2.Qc6#
      • 1...Sd4
        • 2.Sxf6#
      • 1...Se5!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Qc6#
      • 1...Kxe4
        • 2.Qxf5#
      • 1...Sd4
        • 2.Sxf6#
      • 1...Se5
        • 2.Sxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(h);SBLOCK,XP(D)::QAB(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(H)
      • Vars
        • S(c);S_CUTB(i)::S(F),XQ(a)
      • Refutation
        • S(c);N_SPINR(b),P_SPINR(g)
    • Try
      • S(F);XR(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);::QAB1(H)
        • S(c);N_SPINR(b)::R(E)+S(F),DCHECK
        • S(c);::QAB1(H)
      • Refutation
        • S(c);
    • Try
      • S(F);
      • Threat
        • QAB1(H)
      • Vars
        • S(c);N_SPINR(b),P_SPINR(g),S_CUTQ(a)::S(F),XB(i)
      • Refutation
        • S(c);
  • Actual
    • S(F);XP(e)
    • Threat
      • QAB1(H)
    • Vars
      • K(f);N_SPINR(b),S_FLIGHT,XS(F)::QAB1(H),XR(g)
      • S(c);N_SPINR(b),P_SPINR(g),S_CUTQ(a)::S(F),XB(i)
      • S(c);S_CUTB(i)::S(F),XQ(a)
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Developed and maintained by Brian Stephenson.
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