MESON Chess Problem Database

Problem Display
PID: 157410 (3r2b1/q7/R4p2/nRNk1NpQ/K1pb4/p1P5/6pB/3rn3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1956

3r2b1/q7/R4p2/nRNk1NpQ/K1pb4/p1P5/6pB/3rn3

#2

8 + 13

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Se7#
    • 1...Qb8
      • 2.Se7#
    • 1...Qxa6
      • 2.Se7#
    • 1...Qe7
      • 2.Sxe7#
    • 1...Qa8
      • 2.Se7#
    • 1...Rd6
      • 2.Rxd6#
    • 1...Ra8
      • 2.Rd6#
    • 1...Rb8
      • 2.Rd6#
    • 1...Rc8
      • 2.Rd6#
    • 1...Re8
      • 2.Rd6#
    • 1...Rf8
      • 2.Rd6#
    • 1...Be3
      • 2.Sxe3#
    • 1...Be5
      • 2.Se3#
    • 1...Sc2
      • 2.Qf3#
    • 1...Sd3
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sb7
      • 2.Se7#
    • 1...g4
      • 2.Se3#
      • 2.Se7#
  • Tries
    • 1.Qe2?
      • threat
        • 2.Qe4#
      • 1...Qxc5
        • 2.Se7#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Re8
        • 2.Rd6#
      • 1...Be3
        • 2.Sxe3#
      • 1...Bxc5!
    • 1.Qe8?
      • threat
        • 2.Qe4#
      • 1...Rxe8
        • 2.Rd6#
      • 1...Bxc5
        • 2.Se3#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Be5
        • 2.Se3#
      • 1...Be6
        • 2.Qxe6#
      • 1...Qxc5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Qe4#
      • 1...Qxc5
        • 2.Se7#
      • 1...Bxc5
        • 2.Se3#
      • 1...Qe7
        • 2.Sxe7#
      • 1...Re8
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 15
  • Sets
    • Q(k);N_GUARD::S(F)
    • Q(k);N_GUARD,XR(H)::S(F)
    • Q(k);N_GUARD::S(F),XQ(k)
    • R(l);N_GUARD::R1(H),XR(l)
    • R(l);N_GUARD::R1(H)
    • B(f);N_GUARD::S(F),XB(f)
    • B(f);N_GUARD::S(F)
    • S(b);N_GUARD::QAB(G)
    • S(b);N_GUARD::QAB(G),XS(b)
    • S(g);P_PINR(H),S_CUTQ(k)::S(F)
  • Tries
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • Q(k);N_GUARD,P_SPINQ(k),XS(E)::S(F)
        • Q(k);N_GUARD::S(F),XQ(k)
        • R(l);N_GUARD::R1(H)
        • B(f);N_GUARD::S(F),XB(f)
      • Refutation
        • B(f);P_SPINB(f),XS(E)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Vars
        • R(l);N_GUARD,XQ(G)::R1(H)
        • B(f);N_GUARD,P_SPINB(f),XS(E)::S(F)
        • Q(k);N_GUARD::S(F),XQ(k)
        • B(f);N_GUARD::S(F)
        • B(m);N_GUARD::QAB1(G),XB(m)
      • Refutation
        • Q(k);P_SPINQ(k),XS(E)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • Q(k);N_GUARD,P_SPINQ(k),XS(E)::S(F)
      • B(f);N_GUARD,P_SPINB(f),XS(E)::S(F)
      • Q(k);N_GUARD::S(F),XQ(k)
      • R(l);N_GUARD::R1(H)
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