MESON Chess Problem Database

Problem Display
PID: 249322 (3bN3/4Pn1B/4p2B/4k3/1r2PN1p/1PP3pr/Q4n2/2K2R2 w - - 0 1)

Schweighofer, Alois

Schach-Aktiv, 1991

3bN3/4Pn1B/4p2B/4k3/1r2PN1p/1PP3pr/Q4n2/2K2R2

#2

11 + 9

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sd3#
      • 2.Bg7#
    • 1...Sh1
      • 2.Sd3#
      • 2.Bg7#
    • 1...Sd3+
      • 2.Sxd3#
    • 1...Sg4
      • 2.Sd3#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Bg7#
      • 1...Sd3+
        • 2.Sxd3#
      • 1...Sxe4
        • 2.Sg6#
      • 1...Sxh6
        • 2.Qd6#
      • 1...Sg4
        • 2.Sd3#
      • 1...Bxe7!
    • 1.Qxf2?
      • threat
        • 2.Sd3#
        • 2.Bg7#
        • 2.Qc5#
      • 1...Rxe4
        • 2.Bg7#
        • 2.Qc5#
      • 1...Bxe7
        • 2.Sd3#
      • 1...Sxh6
        • 2.Sd3#
        • 2.Qc5#
      • 1...Rc4
        • 2.Sd3#
        • 2.Bg7#
      • 1...Rd4
        • 2.Bg7#
        • 2.Qxd4#
        • 2.cxd4#
      • 1...Rb5
        • 2.Sd3#
        • 2.Bg7#
        • 2.Qd4#
      • 1...Bb6
        • 2.Sd3#
        • 2.Bg7#
      • 1...g2
        • 2.Bg7#
        • 2.Qc5#
      • 1...gxf2!
    • 1.Qa5+?
      • 1...Rb5
        • 2.Qxb5#
      • 1...Bxa5!
    • 1.exd8Q?
      • threat
        • 2.Qf6#
      • 1...Sd3+
        • 2.Sxd3#
      • 1...Sxe4
        • 2.Sd3#
        • 2.Sg6#
      • 1...Sg4
        • 2.Sd3#
      • 1...Sxd8!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Sg6#
      • 1...Sd3+
        • 2.Sxd3#
      • 1...Rxe4
        • 2.Qb5#
      • 1...Sxe4
        • 2.Bg7#
      • 1...Sh8
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • S(a);CHECK,N_GUARD::S(G),XS(a)
    • S(a);N_GUARD::S(G)
  • Tries
    • Try
      • Q(C);
      • Threat
        • B(H)
      • Vars
        • S(a);CHECK,N_GUARD::S(G),XS(a)
        • S(a);SBLOCK,XP(F)::S(G)
        • S(h);N_GUARD,XB(H)::QAB1(C)
        • S(a);N_GUARD::S(G)
      • Refutation
        • B(i);XP(I)
    • Try
      • Q(C);XS(a)
      • Threat
        • DUALS(3)
      • Vars
        • B(i);XP(I)::S(G)
      • Refutation
        • P(b);XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • R(d);N_GUARD,P_SPINR(d)::QAR(C),XR(d)
      • Refutation
        • B(i);XQ(C)
    • Try
      • P(I);XB(i)
      • Threat
        • QAB1(I)
      • Vars
        • S(a);CHECK,N_GUARD::S(G),XS(a)
        • S(a);N_GUARD::S(G)
      • Refutation
        • S(h);XQ(I)
  • Actual
    • Q(C);
    • Threat
      • S(G)
    • Vars
      • S(a);CHECK,N_GUARD::S(G),XS(a)
      • R(d);N_GUARD,P_SPINR(d),XP(F)::QAR(C)
      • S(a);P_SPINS(a),XP(F)::B(H)
      • S(h);N_GUARD::QAR(C)
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