MESON Chess Problem Database

Problem Display
PID: 82171 (8/1r2n2R/3p4/2b1N2R/4kPP1/2P1p2N/B1p1K3/nrQ5 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach-Echo, 1975

8/1r2n2R/3p4/2b1N2R/4kPP1/2P1p2N/B1p1K3/nrQ5

#2

10 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...R1b2
      • 2.Qh1#
    • 1...R1b3
      • 2.Qh1#
    • 1...R1b4
      • 2.Qh1#
    • 1...R1b5
      • 2.Qh1#
    • 1...R1b6
      • 2.Qh1#
    • 1...Ba3
      • 2.Qxe3#
    • 1...Bb4
      • 2.Qxe3#
    • 1...dxe5
      • 2.Rxe5#
  • Tries
    • 1.Sd3?
      • threat
        • 2.Sg5#
      • 1...R1b3
        • 2.Qh1#
      • 1...R7b3
        • 2.Rxe7#
      • 1...Sb3!
    • 1.Sf3?
      • threat
        • 2.Sfg5#
      • 1...R7b3
        • 2.Rxe7#
      • 1...Sb3
        • 2.Qxc2#
      • 1...R1b3!
    • 1.Sf7?
      • threat
        • 2.Sfg5#
      • 1...R1b3
        • 2.Qh1#
      • 1...Sb3
        • 2.Qxc2#
      • 1...R7b3!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Sg5#
      • 1...Sxg6
        • 2.Bd5#
      • 1...R1b3
        • 2.Qh1#
      • 1...R7b3
        • 2.Rxe7#
      • 1...Sb3
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD::QAB(A)
    • B(f);N_GUARD::QAR1(A),XP(d)
    • P(g);OGATE,XS(H)::R1(I),XP(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(E)
      • Vars
        • R(b);N_GUARD::QAB(A)
        • R(h);N_GUARD::R(J),XS(i)
      • Refutation
        • S(a);
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • R(h);N_GUARD::R(J),XS(i)
        • S(a);N_GUARD::QAB(A),XP(c)
      • Refutation
        • R(b);
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • R(b);N_GUARD::QAB(A)
        • S(a);N_GUARD::QAB(A),XP(c)
      • Refutation
        • R(h);
  • Actual
    • S(H);
    • Threat
      • S(E)
    • Vars
      • S(i);N_GUARD,XS(H)::B(B)
      • R(b);N_GUARD::QAB(A)
      • R(h);N_GUARD::R(J),XS(i)
      • S(a);N_GUARD::QAB(A),XP(c)
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