MESON Chess Problem Database

Problem Display
PID: 139267 (5q2/3B1N2/2nQ1P2/2Kpp1B1/3pk3/1R4P1/b5Pb/1n3N2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schakend Nederland, 1964

5q2/3B1N2/2nQ1P2/2Kpp1B1/3pk3/1R4P1/b5Pb/1n3N2

#2

10 + 9

23 Die Schwalbe 1966

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6+
      • 2.Sxd6#
    • 1...Qh6
      • 2.Qxd5#
    • 1...Qg7
      • 2.Qxd5#
    • 1...Qa8
      • 2.Qxd5#
    • 1...Qb8
      • 2.Qxd5#
    • 1...Qc8
      • 2.Qxd5#
    • 1...Qd8
      • 2.Qxd5#
    • 1...Qe8
      • 2.Qxd5#
    • 1...Qg8
      • 2.Qxd5#
    • 1...Qh8
      • 2.Qxd5#
    • 1...Bxg3
      • 2.Sxg3#
    • 1...Sd2
      • 2.Sxd2#
    • 1...Sa3
      • 2.Sd2#
    • 1...Se7
      • 2.Qxe5#
  • Tries
    • 1.Rf3?
      • threat
        • 2.Bf5#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...Se7
        • 2.Qxe5#
      • 1...Qc8!
    • 1.g4?
      • threat
        • 2.Bf5#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...Qc8
        • 2.Qxd5#
      • 1...Se7!
  • Keys
    • 1.Se3!
      • threat
        • 2.Bf5#
      • 1...Qxd6+
        • 2.Sxd6#
      • 1...dxe3
        • 2.Rxe3#
      • 1...Qc8
        • 2.Qxd5#
      • 1...Se7
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(i);CHECK,XQ(G)::S(J),XQ(i)
    • Q(i);N_PINQ(G)::QAB1(G),XP(f)
    • B(c);XP(D)::S(A),XB(c)
    • S(a);N_GUARD::S(A),XS(a)
    • S(a);N_GUARD::S(A)
    • S(h);N_PINQ(G)::QAR1(G),XP(g)
  • Tries
    • Try
      • R(C);
      • Threat
        • B(I)
      • Vars
        • Q(i);CHECK,XQ(G)::S(J),XQ(i)
        • S(h);N_PINQ(G)::QAR1(G),XP(g)
      • Refutation
        • Q(i);N_PINQ(G)
    • Try
      • P(D);
      • Threat
        • B(I)
      • Vars
        • Q(i);CHECK,XQ(G)::S(J),XQ(i)
        • Q(i);N_PINQ(G)::QAB1(G),XP(f)
      • Refutation
        • S(h);N_PINQ(G)
  • Actual
    • S(A);
    • Threat
      • B(I)
    • Vars
      • Q(i);CHECK,XQ(G)::S(J),XQ(i)
      • P(d);OGATE,XS(A)::R1(C),XP(d)
      • Q(i);N_PINQ(G)::QAB1(G),XP(f)
      • S(h);N_PINQ(G)::QAR1(G),XP(g)
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