MESON Chess Problem Database

Problem Display
PID: 240553 (bb6/2PP1R2/2k1nR2/8/2K2p2/3p3q/8/8 w - - 0 1)

Speckmann, Werner

Die Schwalbe, 1971

bb6/2PP1R2/2k1nR2/8/2K2p2/3p3q/8/8

#2

5 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.cxb8Q?
      • threat
        • 2.d8S#
      • 1...Qh8
        • 2.Rxe6#
      • 1...Bb7!
    • 1.d8S+?
      • 1...Kd6
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Kb6!
  • Keys
    • 1.d8Q!
      • threat
        • 2.cxb8S#
      • 1...Kb6
        • 2.cxb8S#
      • 1...Kb7
        • 2.c8Q#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Ba7
        • 2.c8Q#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • P(C);XB(g)
      • Threat
        • P=S
      • Vars
        • Q(b);N_GUARD::R(B),XS(e)
      • Refutation
        • B(f);
    • Try
      • P(D);CHECK
      • Vars
        • K(d);P-FLIGHT::PXB(g)=Q
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • P(D);
    • Threat
      • PXB(g)=S
    • Vars
      • K(d);P-FLIGHT::PXB(g)=S
      • K(d);N_SPINS(e),S_FLIGHT::P=Q
      • B(g);OGATE,XP(C)::QAR1(D),XB(g)
      • B(g);N_GUARD::P=Q
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