MESON Chess Problem Database

Problem Display
PID: 173214 (8/4Q2K/prP5/rk1pN3/8/1b1p4/1N6/5B2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problem Observer, 1990

8/4Q2K/prP5/rk1pN3/8/1b1p4/1N6/5B2

#2

6 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Bxd3#
    • 1...Ba4
      • 2.Bxd3#
  • Tries
    • 1.Sbxd3?
      • threat
        • 2.Qb4#
      • 1...Ka4
        • 2.Sb2#
      • 1...Ra4
        • 2.Qc5#
      • 1...Rb7!
  • Keys
    • 1.Sexd3!
      • threat
        • 2.Qc5#
      • 1...Kxc6
        • 2.Se5#
      • 1...Rxc6
        • 2.Qb4#
      • 1...Rb7
        • 2.Qxb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::B(A),XP(b)
  • Tries
    • Try
      • S(B);XP(b)
      • Threat
        • QAR1(E)
      • Vars
        • K(d);S_FLIGHT::S(B)
        • R(c);SBLOCK::QAR1(E)
      • Refutation
        • R(g);P_PINQ(E)
  • Actual
    • S(C);XP(b)
    • Threat
      • QAR1(E)
    • Vars
      • K(d);S_FLIGHT,XP(D)::S(C)
      • R(g);SBLOCK,XP(D)::QAR1(E)
      • R(g);OGATEB,P_PINQ(E)::QAR2(E),XR(g)
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