MESON Chess Problem Database

Problem Display
PID: 260748 (8/6p1/3Kn3/pR2N3/4kpP1/1nR2N2/8/8 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Neue Zurcher Zeitung, 2006

8/6p1/3Kn3/pR2N3/4kpP1/1nR2N2/8/8

#2

6 + 6

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sbd4
      • 2.Sd2#
    • 1...Sed4
      • 2.Sg5#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Rd3#
      • 1...Sxd2!
    • 1.Sg5+?
      • 1...Kd4
        • 2.Rd3#
      • 1...Sxg5!
    • 1.Sc4?
      • threat
        • 2.Re5#
      • 1...Sbc5
        • 2.Scd2#
      • 1...Sec5!
    • 1.Sf7?
      • threat
        • 2.Re5#
      • 1...Sec5
        • 2.S7g5#
      • 1...Sbc5!
    • 1.Rb4+?
      • 1...Sbd4
        • 2.Sd2#
      • 1...Sed4
        • 2.Sg5#
      • 1...axb4!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Re5#
      • 1...Sbc5
        • 2.Sd2#
      • 1...Sec5
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • S(a);N_GUARD,SBLOCK::S(B)
    • S(e);N_GUARD,SBLOCK::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT,S_CUTS(a)::R1(A)
      • Refutation
        • S(a);XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • K(b);P-FLIGHT,S_CUTS(e)::R1(A)
      • Refutation
        • S(e);XS(B)
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • S(a);N_GUARD::S(E)
      • Refutation
        • S(e);
    • Try
      • S(E);
      • Threat
        • R1(D)
      • Vars
        • S(e);N_GUARD::S(E)
      • Refutation
        • S(a);
    • Try
      • R(D);CHECK
      • Vars
        • S(a);P_SPINS(a)::S(B)
        • S(e);P_SPINS(e)::S(B)
      • Refutation
        • P(d);XR(D)
  • Actual
    • S(E);
    • Threat
      • R1(D)
    • Vars
      • S(a);N_GUARD::S(B)
      • S(e);N_GUARD::S(B)
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