MESON Chess Problem Database

Problem Display
PID: 276591 (7q/8/5R2/2Q5/2P1pN2/2B1K1P1/R7/2N2k2 w - - 0 1)

Ahlheim, Karl-Heinz

To Mat, 1962

7q/8/5R2/2Q5/2P1pN2/2B1K1P1/R7/2N2k2

#2

9 + 3

15601 Albrecht-Leiss-Degener Collection 2024

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Sxh3#
    • 1...Qa8
      • 2.Sh3#
    • 1...Qe8
      • 2.Sh3#
    • 1...Qg8
      • 2.Sh3#
  • Tries
    • 1.Ra1?
      • threat
        • 2.Sa2#
        • 2.Sce2#
        • 2.Sb3#
        • 2.Scd3#
      • 1...Qh5
        • 2.Sce2#
      • 1...Qa8
        • 2.Sa2#
      • 1...Qb8
        • 2.Sb3#
      • 1...Qd8
        • 2.Scd3#
      • 1...Kg1!
    • 1.Qh5?
      • threat
        • 2.Qd1#
      • 1...Kg1
        • 2.Qd1#
      • 1...Qd8
        • 2.Qh1#
      • 1...Qxh5!
  • Keys
    • 1.Kxe4!
      • threat
        • 2.Qf2#
      • 1...Qh1+
        • 2.Sg2#
      • 1...Qh7+
        • 2.Sg6#
      • 1...Qa8+
        • 2.Sd5#
      • 1...Qe8+
        • 2.Se6#
      • 1...Qh2
        • 2.Sg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD,P_PINP(E)::R(I)+S(G),XQ(c)
    • Q(c);N_GUARD::R(I)+S(G)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(4)
      • Vars
        • Q(c);::R(B)+S(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR2(H)
      • Vars
        • K(a);P-FLIGHT::QAR(H)
        • Q(c);N_GUARD::QAR2(H)
      • Refutation
        • Q(c);XQ(H)
  • Actual
    • K(D);P-FLIGHT,XP(b)
    • Threat
      • QAR1(H)
    • Vars
      • Q(c);CHECK,N_GUARD::R(I)+S(G)
      • Q(c);N_GUARD::R(I)+S(G)
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