MESON Chess Problem Database

Problem Display
PID: 82301 (7Q/1B2p3/1K2p3/1pN5/2kP4/R2N4/n3r3/B7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schach, 1987

7Q/1B2p3/1K2p3/1pN5/2kP4/R2N4/n3r3/B7

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Rc3#
    • 1...Sc3
      • 2.Rxc3#
    • 1...Sb4
      • 2.Rc3#
  • Tries
    • 1.Sb2+?
      • 1...Kb4
        • 2.Rb3#
      • 1...Rxb2!
    • 1.Se5+?
      • 1...Kb4
        • 2.Rb3#
      • 1...Rxe5!
    • 1.Sa4?
      • threat
        • 2.Qc8#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Rb2
        • 2.Saxb2#
      • 1...Sb4
        • 2.Rc3#
      • 1...Re5!
    • 1.Se4?
      • threat
        • 2.Qc8#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Sb4
        • 2.Se5#
        • 2.Rc3#
      • 1...Rb2!
    • 1.Sd7?
      • threat
        • 2.Qc8#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Re5
        • 2.S7xe5#
      • 1...Sb4
        • 2.Rc3#
      • 1...Rb2!
  • Keys
    • 1.Sa6!
      • threat
        • 2.Qc8#
      • 1...Sc3
        • 2.Rxc3#
      • 1...Rb2
        • 2.Sxb2#
      • 1...Re5
        • 2.Sxe5#
      • 1...Sb4
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::R1(B)
    • S(a);N_GUARD::R1(B),XS(a)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(B)
      • Refutation
        • R(b);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::R1(B)
      • Refutation
        • R(b);XS(C)
    • Try
      • S(E);
      • Threat
        • QAR(H)
      • Vars
        • S(a);N_GUARD::R1(B),XS(a)
        • R(b);N_GUARD::S(E),XR(b)
        • S(a);N_GUARD::R1(B)
      • Refutation
        • R(b);
    • Try
      • S(E);
      • Threat
        • QAR(H)
      • Vars
        • S(a);N_GUARD::R1(B),XS(a)
      • Refutation
        • R(b);
    • Try
      • S(E);
      • Threat
        • QAR(H)
      • Vars
        • S(a);N_GUARD::R1(B),XS(a)
        • R(b);N_GUARD::S(E),XR(b)
        • S(a);N_GUARD::R1(B)
      • Refutation
        • R(b);
  • Actual
    • S(E);
    • Threat
      • QAR(H)
    • Vars
      • S(a);N_GUARD::R1(B),XS(a)
      • R(b);N_GUARD::S(C),XR(b)
      • S(a);N_GUARD::R1(B)
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