MESON Chess Problem Database

Problem Display
PID: 160795 (1nQ5/1p3K2/b7/1PPk4/1R1b2N1/3r1PN1/8/q2Rn2B w - - 0 1)

Ahues, Herbert Siegfried Oskar

Schweizerische Arbeiter Schachzeitung, 1972

1nQ5/1p3K2/b7/1PPk4/1R1b2N1/3r1PN1/8/q2Rn2B

#2

10 + 8

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra3
      • 2.Qf5#
    • 1...Rb3
      • 2.Qf5#
    • 1...Rc3
      • 2.Rdxd4#
      • 2.Rbxd4#
      • 2.Qf5#
    • 1...Rxf3+
      • 2.Qf5#
    • 1...Bxc5
      • 2.Qe6#
    • 1...Be5
      • 2.Se3#
  • Tries
    • 1.Sf6+?
      • 1...Ke5
        • 2.Qf5#
        • 2.Qc7#
        • 2.Qxb8#
      • 1...Bxf6!
    • 1.Qc7?
      • threat
        • 2.Qd6#
      • 1...Rxf3+
        • 2.Sf6#
      • 1...Be5
        • 2.Se3#
      • 1...Bxc5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qe6#
      • 1...Rxf3+
        • 2.Sef6#
      • 1...Sd7
        • 2.Qxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(c);P_SPINB(d)::QAR2(J)
    • R(c);CHECK,P_SPINB(d),P_SPINR(c),XP(C)::QAR2(J)
    • B(d);P_SPINR(c),SBLOCK,XP(H)::QAB1(J)
    • B(d);N_GUARD,P_SPINR(c),SBLOCK::S(F)
  • Tries
    • Try
      • S(F);CHECK
      • Refutation
        • B(d);P_SPINR(c),XS(F)
    • Try
      • Q(J);
      • Threat
        • QAR1(J)
      • Vars
        • R(c);CHECK,P_SPINB(d),P_SPINR(c),XP(C)::S(F)
        • B(d);N_GUARD,P_SPINR(c)::S(F)
      • Refutation
        • B(d);P_SPINR(c),XP(H)
  • Actual
    • S(D);
    • Threat
      • QAB1(J)
    • Vars
      • R(c);CHECK,P_SPINB(d),XP(C)::S(D)
      • S(h);N_GUARD::QAR2(J),XS(h)
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