MESON Chess Problem Database

Problem Display
PID: 82290 (7B/b2p4/3R2K1/Q2P4/3nkpN1/4n3/2P5/5R2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Due Alfieri, 1986

7B/b2p4/3R2K1/Q2P4/3nkpN1/4n3/2P5/5R2

#2

8 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd5
      • 2.Qxd5#
    • 1...Sf3
      • 2.Sf2#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qd3#
      • 1...Sexc2
        • 2.Rxf4#
      • 1...f3
        • 2.Qxe3#
      • 1...Sdxc2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qd3#
      • 1...Sexc2
        • 2.Sf2#
      • 1...Sdxc2
        • 2.Sf6#
      • 1...f3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(a);OGATE,XP(E)::QAB1(D),XS(a)
    • S(b);SBLOCK::S(C)
  • Tries
    • Try
      • Q(D);
      • Threat
        • QAB1(D)
      • Vars
        • S(a);XP(B)::R1(A),XP(d)
        • P(d);N_GUARD::QAR1(D),XS(a)
      • Refutation
        • S(b);XP(B)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • S(a);XP(B)::S(C)
      • S(b);XP(B)::S(C)
      • P(d);N_GUARD::QAR1(D),XS(a)
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