MESON Chess Problem Database

Problem Display
PID: 255987 (1b1R4/1K3R2/4p1P1/4k3/3pNpp1/B2P4/4Qpqn/7B w - - 0 1)

Ahues, Herbert Siegfried Oskar

Berliner Morgenpost, 1962

1b1R4/1K3R2/4p1P1/4k3/3pNpp1/B2P4/4Qpqn/7B

#2

9 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Sg3#
    • 1...Qxe4+
      • 2.Qxe4#
    • 1...Qg1
      • 2.Sd2#
      • 2.Sxf2#
      • 2.Sc3#
      • 2.Sg3#
      • 2.Sc5#
      • 2.Sg5#
      • 2.Sd6#
    • 1...Qg3
      • 2.Sxg3#
    • 1...Sf3
      • 2.Sd2#
      • 2.Sxf2#
      • 2.Sc3#
      • 2.Sg3#
      • 2.Sc5#
      • 2.Sg5#
    • 1...g3
      • 2.Qh5#
  • Tries
    • 1.Bd6+?
      • 1...Kd5
        • 2.Sf6#
        • 2.Bc7#
        • 2.Bxb8#
        • 2.Qa2#
      • 1...Bxd6!
    • 1.Bf8?
      • threat
        • 2.Bg7#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Bd6!
    • 1.Rd5+?
      • 1...Kxd5
        • 2.Sf6#
      • 1...exd5!
  • Keys
    • 1.Rh8!
      • threat
        • 2.Rh5#
      • 1...Qxe4+
        • 2.Qxe4#
      • 1...Kd5
        • 2.Sf6#
      • 1...Qh3
        • 2.Sg3#
      • 1...Sf3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(b);N_PINS(E)::QAR(B)+S(E)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAR1(B),XQ(b)
    • Q(b);N_PINS(E)::QAR(B)+S(E),XQ(b)
    • P(f);OGATE::QAR(B)
  • Tries
    • Try
      • B(C);CHECK
      • Refutation
        • B(i);XB(C)
    • Try
      • B(C);
      • Threat
        • B(C)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAR1(B),XQ(b)
      • Refutation
        • B(i);
    • Try
      • R(I);CHECK,N_SPINS(E)
      • Vars
        • K(g);P-FLIGHT,XR(I)::S(E)
      • Refutation
        • P(h);XR(I)
  • Actual
    • R(I);
    • Threat
      • R(I)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAR1(B),XQ(b)
      • K(g);N_PINS(E),P-FLIGHT::S(E)
      • Q(b);N_PINS(E)::QAR(B)+S(E)
      • S(c);N_PINS(E)::QAR(B)+S(E)
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