MESON Chess Problem Database

Problem Display
PID: 135367 (1r6/p7/pk3B1n/rn4RK/PN1P4/p7/8/1QR4B w - - 0 1)

Laib, Kurt Friedrich

Die Schwalbe, 1942

1r6/p7/pk3B1n/rn4RK/PN1P4/p7/8/1QR4B

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Sd5#
      • 2.Rc6#
    • 1...Sxd4
      • 2.Sd5#
    • 1...Sd6
      • 2.Sd5#
    • 1...Sc7
      • 2.Sd5#
  • Tries
    • 1.Bd8+?
      • 1...Sc7
        • 2.Sd5#
        • 2.Bxc7#
        • 2.Qg6#
      • 1...Rxd8!
    • 1.Qg6?
      • threat
        • 2.Bd8#
      • 1...Rd8
        • 2.Bxd8#
      • 1...Sd6!
  • Keys
    • 1.Rg6!
      • threat
        • 2.Bd8#
      • 1...Sc3+
        • 2.Be5#
      • 1...Sxd4+
        • 2.Sd5#
      • 1...Sd6+
        • 2.Sd5#
      • 1...Sc7+
        • 2.Sd5#
      • 1...Rd8
        • 2.Bxd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);P_PINR(G),XP(F)::QAR(A)+S(E),DCHECK
    • S(c);P_PINR(G)::QAR(A)+S(E),DCHECK
  • Tries
    • Try
      • B(I);CHECK
      • Refutation
        • R(h);XB(I)
    • Try
      • Q(A);
      • Threat
        • QAR(A)+B(I),DCHECK
      • Vars
        • R(h);::QAR(A)+B(I),DCHECK,XR(h)
      • Refutation
        • S(c);P_PINR(G)
  • Actual
    • R(G);
    • Threat
      • R(G)+B(I),DCHECK
    • Vars
      • S(c);CHECK,N_GUARD::R(G)+B(I)
      • S(c);CHECK,XP(F)::QAR(A)+S(E),DCHECK
      • S(c);CHECK::QAR(A)+S(E),DCHECK
      • R(h);::R(G)+B(I),DCHECK,XR(h)
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