MESON Chess Problem Database

Problem Display
PID: 164214 (BB3R2/8/3nq3/3Rp3/1N1pk2b/8/Kn4P1/Q4N2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

stern, 1997

(First published on Thu Jun 19 1997)

BB3R2/8/3nq3/3Rp3/1N1pk2b/8/Kn4P1/Q4N2

#2

9 + 7

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qh3
      • 2.Rxd6#
    • 1...Qg4
      • 2.Rxd6#
    • 1...Qxd5+
      • 2.Bxd5#
    • 1...Qg6
      • 2.Rxd6#
    • 1...Qh6
      • 2.Rxd6#
    • 1...Be1
      • 2.Qxe1#
    • 1...Be7
      • 2.Qe1#
    • 1...Bd8
      • 2.Qe1#
    • 1...Sbc4
      • 2.Rxd4#
    • 1...Sdc4
      • 2.Rxe5#
  • Tries
    • 1.Sg3+?
      • 1...Ke3
        • 2.Qc1#
        • 2.Qe1#
      • 1...Bxg3!
    • 1.Qb1+?
      • 1...Sd3
        • 2.Qxd3#
      • 1...d3!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Sd2#
      • 1...Qxd5+
        • 2.Bxd5#
      • 1...Qh6
        • 2.Rxd6#
      • 1...Be1
        • 2.Qxe1#
      • 1...Bg5
        • 2.Sg3#
      • 1...Sbc4
        • 2.Rxd4#
      • 1...Sdc4
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • Q(g);N_PINR(F)::B(G)+R(F),XS(f)
    • Q(g);CHECK,OGATE,P_SPINQ(g),XR(F)::B(G),XQ(g)
    • B(d);N_GUARD::QAR(A),XB(d)
    • B(d);N_GUARD::QAR(A)
    • S(a);N_PINR(F)::B(G)+R(F),DCHECK,XP(b)
    • S(f);N_PINR(F)::B(G)+R(F),DCHECK,XP(e)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • B(d);XS(B)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(A),XS(a)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • R(I);
    • Threat
      • S(B)
    • Vars
      • Q(g);CHECK,OGATE,P_SPINQ(g),XR(F)::B(G),XQ(g)
      • Q(g);N_PINR(F)::B(G)+R(F),XS(f)
      • B(d);N_GUARD::QAR(A),XB(d)
      • B(d);N_GUARD::S(B)
      • S(a);N_PINR(F)::B(G)+R(F),DCHECK,XP(b)
      • S(f);N_PINR(F)::B(G)+R(F),DCHECK,XP(e)
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