MESON Chess Problem Database

Problem Display
PID: 82364 (3Qn3/b1p2b2/2R1pN1K/2pNkp1p/7R/3P4/2r5/6B1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Freie Presse, 1995

3Qn3/b1p2b2/2R1pN1K/2pNkp1p/7R/3P4/2r5/6B1

#2

8 + 10

6490 yacpdb 2009
23 Die Schwalbe 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sg7
      • 2.Qxc7#
    • 1...exd5
      • 2.Sd7#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sd7#
      • 1...Sxf6
        • 2.Qxc7#
      • 1...f4!
    • 1.Sf4?
      • threat
        • 2.Sd7#
      • 1...Sxf6
        • 2.Qxc7#
      • 1...Rf2!
    • 1.Sg4+?
      • 1...fxg4
        • 2.Qg5#
      • 1...hxg4!
    • 1.Rxe6+?
      • 1...Kxe6
        • 2.Qe7#
      • 1...Bxe6!
    • 1.Qxc7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sxc7!
  • Keys
    • 1.Se7!
      • threat
        • 2.Sd7#
      • 1...Kxf6
        • 2.Sg6#
      • 1...Sxf6
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(j);N_GUARD::QAB(H),XP(h)
    • P(f);SBLOCK,XS(D)::S(F)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(F)
      • Vars
        • S(j);N_GUARD,SBLOCK,XS(F)::QAB(H),XP(h)
      • Refutation
        • P(d);
    • Try
      • S(D);
      • Threat
        • S(F)
      • Vars
        • S(j);N_GUARD,SBLOCK,XS(F)::QAB(H),XP(h)
      • Refutation
        • R(a);
    • Try
      • S(F);CHECK
      • Vars
        • P(d);S_CUTP(e),XS(F)::QAR2(H)
      • Refutation
        • P(e);XS(F)
    • Try
      • R(E);CHECK,XP(f)
      • Vars
        • K(c);P-FLIGHT,XR(E)::QAR1(H)
      • Refutation
        • B(i);XR(E)
    • Try
      • Q(H);CHECK,XP(h)
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAB1(H),XS(j)
      • Refutation
        • S(j);XQ(H)
  • Actual
    • S(D);
    • Threat
      • S(F)
    • Vars
      • K(c);P_SPINP(f),S_FLIGHT,XS(F)::QAB(H)+S(D)
      • S(j);N_GUARD,SBLOCK,XS(F)::QAB(H),XP(h)
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