MESON Chess Problem Database

Problem Display
PID: 82399 (3R1B1b/4pK1B/3P2n1/1R1Pk3/q3NpP1/1N2p3/2Q5/6n1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Schachzeitung, 2002

3R1B1b/4pK1B/3P2n1/1R1Pk3/q3NpP1/1N2p3/2Q5/6n1

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bg7
      • 2.Bxg7#
    • 1...exd6
      • 2.Bxd6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qf5#
      • 1...Qxb3
        • 2.Qe4#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sh4
        • 2.Sd3#
      • 1...e6!
    • 1.Sf6?
      • threat
        • 2.Qf5#
      • 1...Qxb3
        • 2.Qe4#
      • 1...e6
        • 2.Sd7#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sh4!
    • 1.Qb2+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Kxe4!
    • 1.Qc3+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Kxe4!
  • Keys
    • 1.Sec5!
      • threat
        • 2.Qf5#
      • 1...Kxd5
        • 2.Sxa4#
      • 1...Qxb3
        • 2.Qe4#
      • 1...e6
        • 2.Sd7#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sh4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • B(h);N_GUARD::B(K),XB(h)
    • P(g);OGATE,XP(G)::B(K),XP(g)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);N_GUARD,P_PINP(F),XS(B)::QAR1(A)
        • Q(c);N_GUARD::QAR1(A),XQ(c)
        • S(f);::S(C)
      • Refutation
        • P(g);
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);N_GUARD,P_PINP(F),XS(B)::QAR1(A)
        • P(g);::S(C)
        • Q(c);N_GUARD::QAR1(A),XQ(c)
      • Refutation
        • S(f);
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(A),XQ(c)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(f),XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(A),XQ(c)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(f),XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(e);P-FLIGHT,XP(F)::R(E)+S(C),XQ(c)
      • Q(c);N_GUARD,P_PINP(F),XS(B)::QAR1(A)
      • P(g);::S(C)
      • Q(c);N_GUARD::QAR1(A),XQ(c)
      • S(f);::S(C)
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