MESON Chess Problem Database

Problem Display
PID: 57222 (8/7K/R1R1pB1b/3kNn2/2p1p3/1n6/3qN3/3Q4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Comm., Troll, 1995

8/7K/R1R1pB1b/3kNn2/2p1p3/1n6/3qN3/3Q4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sc3#
    • 1...Sa1
      • 2.Ra5#
    • 1...Sc1
      • 2.Ra5#
    • 1...Sa5
      • 2.Rxa5#
    • 1...c3
      • 2.Qxb3#
    • 1...e3
      • 2.Qh1#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sc3#
      • 1...Sbd4
        • 2.Rc5#
      • 1...Sfd4
        • 2.Rd6#
      • 1...c3
        • 2.Sxc3#
        • 2.Qxb3#
      • 1...e5!
    • 1.Ra5+?
      • 1...Sc5
        • 2.Raxc5#
      • 1...Sxa5!
    • 1.Qxd2+?
      • 1...Sxd2
        • 2.Ra5#
      • 1...Sbd4
        • 2.Sc3#
        • 2.Ra5#
      • 1...Sfd4
        • 2.Sc3#
      • 1...Bxd2!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sb4#
      • 1...Qxd3
        • 2.Sc3#
      • 1...cxd3
        • 2.Qxb3#
      • 1...exd3
        • 2.Qh1#
      • 1...e3
        • 2.Qh1#
      • 1...Qb4
        • 2.Sxb4#
        • 2.Sdf4#
      • 1...Bf8
        • 2.Sdf4#
      • 1...Sbd4
        • 2.Rc5#
      • 1...Sfd4
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(a);::S(B)
    • S(b);N_GUARD::R(D)
    • S(b);N_GUARD::R(D),XS(b)
    • P(c);OGATEB::QAB(A),XS(b)
    • P(d);OGATEB::QAB(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(B)
      • Vars
        • S(b);N_GUARD,N_SPINQ(a)::R1(E)
        • S(f);N_GUARD,N_SPINQ(a)::R1(E)
      • Refutation
        • P(g);
    • Try
      • R(D);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(D),XS(b)
      • Refutation
        • S(b);XR(D)
    • Try
      • Q(A);CHECK,XQ(a)
      • Vars
        • S(b);XQ(A)::R(D)
        • S(f);P_SPINS(f)::S(B)
      • Refutation
        • B(h);XQ(A)
  • Actual
    • S(C);N_PINQ(a)
    • Threat
      • S(C)
    • Vars
      • Q(a);N_GUARD,P_SPINQ(a),XS(C)::S(B)
      • P(c);OGATEB,XS(C)::QAB(A),XS(b)
      • P(d);OGATEB,XS(C)::QAB(A)
      • P(d);OGATEB::QAB(A)
      • B(h);N_GUARD::S(C)
      • S(b);N_GUARD::R1(E)
      • S(f);N_GUARD::R1(E)
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