MESON Chess Problem Database

Problem Display
PID: 81925 (8/nQ4N1/1pr3qR/P2kP2r/1B1Pp2b/2R1P3/K1N5/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Die Schwalbe, 1997

8/nQ4N1/1pr3qR/P2kP2r/1B1Pp2b/2R1P3/K1N5/8

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rd6#
    • 1...Qf7
      • 2.Rd6#
    • 1...Qh7
      • 2.Rd6#
    • 1...Qe8
      • 2.Rd6#
    • 1...Qg1
      • 2.Rd6#
    • 1...Qg2
      • 2.Rd6#
    • 1...Qg3
      • 2.Rd6#
    • 1...Qg4
      • 2.Rd6#
    • 1...Qg5
      • 2.Rd6#
    • 1...Qd6
      • 2.Rxd6#
    • 1...Qxg7
      • 2.Rd6#
    • 1...bxa5
      • 2.Rc5#
    • 1...b5
      • 2.Rc5#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Sb4#
      • 1...Qxd6
        • 2.Rxd6#
      • 1...bxa5
        • 2.Rc5#
      • 1...Qg2
        • 2.Qf7#
      • 1...Rxe5!
    • 1.Be7?
      • threat
        • 2.Sb4#
      • 1...bxa5
        • 2.Rc5#
      • 1...Qg2
        • 2.Rd6#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Bxe7!
    • 1.Bf8?
      • threat
        • 2.Sb4#
      • 1...bxa5
        • 2.Rc5#
      • 1...Qg2
        • 2.Rd6#
      • 1...Qd6
        • 2.Rxd6#
      • 1...Be7!
  • Keys
    • 1.Bc5!
      • threat
        • 2.Sb4#
      • 1...bxa5
        • 2.Qb3#
      • 1...bxc5
        • 2.Rxc5#
      • 1...Qg2
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(g);OGATE::R1(I)
    • Q(g);OGATE,P_PINS(B)::R1(I)
    • Q(g);OGATE::R1(I),XQ(g)
    • Q(g);OGATE,XS(K)::R1(I)
    • P(e);N_GUARD,XP(G)::R1(C)
    • P(e);N_GUARD::R1(C)
  • Tries
    • Try
      • B(E);
      • Threat
        • S(B)
      • Vars
        • Q(g);OGATE,XB(E)::R1(I),XQ(g)
        • P(e);N_GUARD,XP(G)::R1(C)
        • Q(g);N_GUARD,P_PINS(B)::QAB(J)
      • Refutation
        • R(d);XP(H)
    • Try
      • B(E);
      • Threat
        • S(B)
      • Vars
        • P(e);N_GUARD,XP(G)::R1(C)
        • Q(g);OGATE,P_PINS(B)::R1(I)
        • Q(g);OGATE::R1(I),XQ(g)
      • Refutation
        • B(b);XB(E)
    • Try
      • B(E);
      • Threat
        • S(B)
      • Vars
        • P(e);N_GUARD,XP(G)::R1(C)
        • Q(g);OGATE,P_PINS(B)::R1(I)
        • Q(g);OGATE::R1(I),XQ(g)
      • Refutation
        • B(b);
  • Actual
    • B(E);
    • Threat
      • S(B)
    • Vars
      • P(e);OGATE,XP(G)::QAB(J)
      • P(e);OGATE,XB(E)::R1(C),XP(e)
      • Q(g);OGATE,P_PINS(B)::R1(I)
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