MESON Chess Problem Database

Problem Display
PID: 82088 (1r4n1/4p1Kb/3Pp2p/Q1BBk3/4p1RN/2PR4/1r3P2/1n6 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach-Echo, 1961

1r4n1/4p1Kb/3Pp2p/Q1BBk3/4p1RN/2PR4/1r3P2/1n6

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc3
      • 2.Qxc3#
    • 1...e3
      • 2.f4#
    • 1...exd6
      • 2.Bd4#
  • Tries
    • 1.Bxe4?
      • threat
        • 2.Sf3#
      • 1...Rxf2
        • 2.Bb6#
      • 1...Bxe4
        • 2.f4#
      • 1...Rf8
        • 2.Bb4#
      • 1...Sd2!
    • 1.Rg5+?
      • 1...Kf4
        • 2.Be3#
      • 1...Bf5
        • 2.Sg6#
      • 1...hxg5!
  • Keys
    • 1.Be3!
      • threat
        • 2.Bf4#
      • 1...Kxd6
        • 2.Bxe4#
      • 1...Rxf2
        • 2.Bb7#
      • 1...exd5
        • 2.Qxd5#
      • 1...Rf8
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(a);OGATE,XP(B)::QAB(F),XS(a)
    • P(c);N_GUARD::P(A)
    • P(g);SBLOCK,XP(I)::B(G)
  • Tries
    • Try
      • B(H);XP(c)
      • Threat
        • S(E)
      • Vars
        • R(b);N_GUARD,XP(A)::QAR(F)+B(G)
        • B(h);SBLOCK,XB(H)::P(A)
        • R(i);N_GUARD::QAR(F)+B(G)
      • Refutation
        • S(a);
    • Try
      • R(D);CHECK
      • Vars
        • K(d);S_FLIGHT::B(G)
        • B(h);P_SPINB(h)::S(E)
      • Refutation
        • P(f);XR(D)
  • Actual
    • B(G);
    • Threat
      • B(G)
    • Vars
      • K(d);S_FLIGHT,XP(I)::R(C)+B(H),XP(c)
      • R(b);N_GUARD,XP(A)::QAR(F)+B(H)
      • P(e);OGATE,P_SPINP(e),XB(H)::QAR1(F),XP(e)
      • R(i);N_GUARD::QAR(F)+B(H)
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