MESON Chess Problem Database

Problem Display
PID: 161857 (6q1/3R4/BNn3p1/4p3/1p2p2R/4k3/1Q3pK1/1N2rnb1 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1983

6q1/3R4/BNn3p1/4p3/1p2p2R/4k3/1Q3pK1/1N2rnb1

#2

7 + 11

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qb3
      • 2.Qxb3#
    • 1...Qc4
      • 2.Sxc4#
    • 1...Qd5
      • 2.Sxd5#
    • 1...Qh7
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qg7
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qa8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qb8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qc8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qd8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qe8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qf8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Qh8
      • 2.Sc4#
      • 2.Sd5#
      • 2.Qb3#
    • 1...Rxb1
      • 2.Qe2#
    • 1...Rc1
      • 2.Qe2#
    • 1...Rd1
      • 2.Qe2#
    • 1...Re2
      • 2.Qxe2#
    • 1...Bh2
      • 2.Qxf2#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sh2
      • 2.Qd2#
    • 1...Sg3
      • 2.Qd2#
    • 1...b3
      • 2.Qc3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Rxe4#
      • 1...Sxd2
        • 2.Qxd2#
      • 1...Qc4
        • 2.Sdxc4#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Sg3!
    • 1.Sa3?
      • threat
        • 2.Sc2#
      • 1...bxa3
        • 2.Qc3#
      • 1...Qb3
        • 2.Qxb3#
      • 1...Qc4
        • 2.Saxc4#
        • 2.Sbxc4#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Rc1
        • 2.Qe2#
      • 1...Re2
        • 2.Qxe2#
      • 1...b3
        • 2.Qc3#
      • 1...Sd4!
    • 1.Bxf1?
      • threat
        • 2.Qd2#
      • 1...Qd5
        • 2.Sxd5#
      • 1...Rd1
        • 2.Qe2#
      • 1...Re2
        • 2.Qxe2#
      • 1...Qa2!
    • 1.Rh3+?
      • 1...Sg3
        • 2.Qd2#
      • 1...Kf4!
    • 1.Qc1+?
      • 1...Sd2
        • 2.Qxd2#
      • 1...Rxc1!
    • 1.Qc2?
      • threat
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sg3
        • 2.Qd2#
      • 1...Qd5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Rxe4#
      • 1...bxc3
        • 2.Qxc3#
      • 1...Qd5
        • 2.Scxd5#
      • 1...Qc4
        • 2.Sxc4#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Sg3
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(k);N_GUARD::QAR(B),XQ(k)
    • Q(k);N_GUARD::S(F),XQ(k)
    • R(a);N_GUARD,XS(A)::QAR1(B)
    • R(a);N_GUARD::QAR1(B)
    • R(a);N_GUARD::QAR1(B),XR(a)
    • B(c);N_GUARD::QAB1(B),XP(d)
    • S(b);N_GUARD::QAB1(B),XS(b)
    • S(b);N_GUARD::QAB1(B)
    • P(f);N_GUARD::QAR2(B)
  • Tries
    • Try
      • S(A);
      • Threat
        • R1(D),XP(g)
      • Vars
        • S(b);OGATE,XS(A)::QAB1(B),XS(b)
        • Q(k);N_GUARD::S(A),XQ(k)
        • Q(k);N_GUARD::S(F),XQ(k)
      • Refutation
        • S(b);
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • P(f);N_GUARD,XS(A)::QAR2(B)
        • Q(k);N_GUARD::QAR(B),XQ(k)
        • Q(k);N_GUARD::S(F),XQ(k)
        • R(a);N_GUARD::QAR1(B)
        • R(a);N_GUARD::QAR1(B),XR(a)
        • P(f);N_GUARD::QAR2(B)
      • Refutation
        • S(i);
    • Try
      • B(E);XS(b)
      • Threat
        • QAB1(B)
      • Vars
        • Q(k);N_GUARD::S(F),XQ(k)
        • R(a);N_GUARD::QAR1(B)
        • R(a);N_GUARD::QAR1(B),XR(a)
      • Refutation
        • Q(k);
    • Try
      • R(D);CHECK
      • Vars
        • S(b);P_SPINS(b)::QAB1(B)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::QAB1(B),XS(b)
      • Refutation
        • R(a);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);N_GUARD::S(F),XQ(k)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • S(b);N_GUARD::QAB1(B)
      • Refutation
        • Q(k);
  • Actual
    • S(A);
    • Threat
      • R1(D),XP(g)
    • Vars
      • P(f);OGATE,XS(A)::QAR2(B),XP(f)
      • Q(k);N_GUARD::S(A),XQ(k)
      • Q(k);N_GUARD::S(F),XQ(k)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • S(b);N_GUARD::QAB1(B)
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Developed and maintained by Brian Stephenson.
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