MESON Chess Problem Database

Problem Display
PID: 161597 (rn1Q2K1/3p1p2/2p2rp1/1b2k3/3R2P1/1B2P3/1N1R4/B3q3 w - - 0 1)

Ahues, Herbert Siegfried Oskar

El Ajedrez, 1980

rn1Q2K1/3p1p2/2p2rp1/1b2k3/3R2P1/1B2P3/1N1R4/B3q3

#2

9 + 10

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qe7#
    • 1...Rf2
      • 2.Qe7#
    • 1...Rf3
      • 2.Qe7#
    • 1...Rf4
      • 2.Qe7#
      • 2.exf4#
    • 1...Rf5
      • 2.Qe7#
    • 1...Bd3
      • 2.Sxd3#
    • 1...Ba4
      • 2.Sd3#
  • Tries
    • 1.Sc4+?
      • 1...Ke6
        • 2.Re4#
        • 2.Rd6#
        • 2.Qe8#
      • 1...Bxc4!
    • 1.Qc7+?
      • 1...Rd6
        • 2.Qxd6#
      • 1...d6!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qxf6#
      • 1...Rxf4
        • 2.Qe7#
      • 1...Qh4
        • 2.Sa4#
      • 1...Rf5
        • 2.Qe7#
      • 1...Rd6
        • 2.Sd3#
      • 1...Re6
        • 2.Sc4#
      • 1...Sa6
        • 2.Sd1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • R(e);N_GUARD::QAR2(H)
    • B(b);N_GUARD::S(B),XB(b)
    • B(b);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Refutation
        • B(b);XS(B)
    • Try
      • Q(H);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(H),XR(e)
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • R(F);
    • Threat
      • QAB1(H),XR(e)
    • Vars
      • R(e);N_GUARD,XR(F)::QAR2(H)
      • Q(a);N_GUARD::B(A)+S(B)
      • R(e);N_GUARD::QAR2(H)
      • R(e);SBLOCK::B(A)+S(B),DCHECK
      • S(j);P_PINQ(H),S_CUTR(i)::B(A)+S(B)
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