MESON Chess Problem Database

Problem Display
PID: 82286 (5Q1B/3p4/1p1rP3/1p1k1p2/1P1N1n2/1K1B1P1b/8/3R4 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Sachsische Zeitung, 1986

5Q1B/3p4/1p1rP3/1p1k1p2/1P1N1n2/1K1B1P1b/8/3R4

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Qxf5#
    • 1...Bg2
      • 2.Qxf5#
  • Tries
    • 1.Bxb5?
      • threat
        • 2.Bc4#
      • 1...Bf1
        • 2.Qxf5#
      • 1...Rc6!
    • 1.Bxf5?
      • threat
        • 2.Be4#
      • 1...Bxf5
        • 2.Qxf5#
      • 1...Rxe6!
  • Keys
    • 1.Sxb5!
      • threat
        • 2.Qxd6#
      • 1...Kc6
        • 2.Qa8#
      • 1...Kxe6
        • 2.Sc7#
      • 1...Rxe6
        • 2.Be4#
      • 1...Rc6
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAR2(H),XP(e)
  • Tries
    • Try
      • B(C);XP(c)
      • Threat
        • B(C)
      • Vars
        • B(a);N_GUARD::QAR2(H),XP(e)
      • Refutation
        • R(g);
    • Try
      • B(C);XP(e)
      • Threat
        • B(C)
      • Vars
        • B(a);OGATE,XB(C)::QAR2(H),XB(a)
      • Refutation
        • R(g);XP(G)
  • Actual
    • S(F);XP(c)
    • Threat
      • QAR1(H),XR(g)
    • Vars
      • K(d);S_FLIGHT::QAB(H)
      • K(d);S_FLIGHT,XP(G)::S(F)
      • R(g);SBLOCK,XP(G)::R(A)+B(C),DCHECK
      • R(g);SBLOCK::R(A)+B(C),DCHECK
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