MESON Chess Problem Database

Problem Display
PID: 58841 (B7/KR1n4/1Q2p2N/2P1r2q/p6P/5k2/r1p4R/2Bb1N2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

1st Prize, Die Schwalbe, 1965/I

B7/KR1n4/1Q2p2N/2P1r2q/p6P/5k2/r1p4R/2Bb1N2

#2

10 + 9

23 Die Schwalbe 1969
3772 FIDE Album (1965-1967) 1976

SOLUTION

  • SOUND
  • Sets
    • 1...Sxc5
      • 2.Rf7#
    • 1...Sxb6
      • 2.Rf7#
    • 1...Sb8
      • 2.Rf7#
    • 1...Sf8
      • 2.Rf7#
  • Tries
    • 1.Rxd7+?
      • 1...Re4
        • 2.Rd3#
      • 1...Rd5!
    • 1.Qb3+?
      • 1...Ke4
        • 2.Rb4#
      • 1...Re3
        • 2.Qxe3#
      • 1...axb3+!
    • 1.Qd6?
      • threat
        • 2.Rb3#
      • 1...Ke4
        • 2.Rb4#
      • 1...Rd5
        • 2.Qf4#
      • 1...Re3
        • 2.Sd2#
      • 1...Re4
        • 2.Qg3#
      • 1...Sb6
        • 2.Rf7#
      • 1...Qxh6!
  • Keys
    • 1.Qxe6!
      • threat
        • 2.Rb3#
      • 1...Ke4
        • 2.Rxd7#
      • 1...Rd5
        • 2.Qe3#
      • 1...Re3
        • 2.Qxe3#
      • 1...Re4
        • 2.Qh3#
      • 1...Sb6
        • 2.Rf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(i);OGATE,XP(E)::B(J)+R(I),DCHECK
    • S(i);OGATE,XQ(F)::B(J)+R(I),DCHECK
    • S(i);OGATE::B(J)+R(I),DCHECK
  • Tries
    • Try
      • R(I);CHECK,XS(i)
      • Vars
        • R(f);P_SPINR(f)::R(I)
      • Refutation
        • R(f);P_SPINR(f)
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);S_FLIGHT::B(J)+R(I),DCHECK
        • R(f);N_GUARD,P_SPINR(f)::QAR1(F),XR(f)
      • Refutation
        • P(e);CHECK,XQ(F)
    • Try
      • Q(F);
      • Threat
        • B(J)+R(I),DCHECK
      • Vars
        • K(d);S_FLIGHT::B(J)+R(I),DCHECK
        • R(f);OGATE::QAR1(F)
        • R(f);SBLOCK::S(B)
        • R(f);OGATE,SBLOCK::QAR1(F)
        • S(i);OGATE::B(J)+R(I),DCHECK
      • Refutation
        • Q(g);XS(G)
  • Actual
    • Q(F);XP(h)
    • Threat
      • B(J)+R(I),DCHECK
    • Vars
      • K(d);P_SPINR(f),S_FLIGHT::B(J)+R(I),XS(i)
      • R(f);OGATE::QAR1(F)
      • R(f);OGATE::QAR1(F),XR(f)
      • R(f);SBLOCK::QAR2(F)
      • S(i);OGATE::B(J)+R(I),DCHECK
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