MESON Chess Problem Database

Problem Display
PID: 254484 (5K2/8/P1Rp2p1/R1pkP1p1/3p2P1/8/1N1P4/1Q3B2 w - - 0 1)

Henning, Hans

Die Schwalbe, 1930

5K2/8/P1Rp2p1/R1pkP1p1/3p2P1/8/1N1P4/1Q3B2

#2

10 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...dxe5
      • 2.Raxc5#
  • Tries
    • 1.Sc4?
      • threat
        • 2.Rxd6#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Rxd6#
      • 1...dxe5
        • 2.Raxc5#
        • 2.Rd6#
      • 1...d3!
    • 1.Raxc5+?
      • 1...Ke6
        • 2.Rxd6#
      • 1...dxc5!
    • 1.Qe4+?
      • 1...Ke6
        • 2.Rxd6#
      • 1...Kxe4!
    • 1.Qxg6?
      • 1...Kxe5
        • 2.Qf5#
      • 1...Kxc6
        • 2.Qxd6#
      • 1...dxe5
        • 2.Bc4#
        • 2.Raxc5#
        • 2.Rcxc5#
        • 2.Rd6#
      • 1...d3!
    • 1.Qe1?
      • threat
        • 2.Rxd6#
      • 1...Ke6
        • 2.Rxd6#
      • 1...dxe5
        • 2.Raxc5#
      • 1...Kxc6!
  • Keys
    • 1.Sd3!
      • 1...Kc4
        • 2.Qa2#
      • 1...Ke4
        • 2.Bg2#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Ke6
        • 2.Rxd6#
      • 1...dxe5
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(e);N_GUARD,SBLOCK,XP(G)::R1(F),XP(b)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(I),XP(e)
      • Vars
        • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XR(I)::QAB1(A)
        • K(c);N_SPINP(b),P_SPINP(e),S_FLIGHT::R1(I),XP(e)
      • Refutation
        • P(a);
    • Try
      • R(F);CHECK,XP(b)
      • Vars
        • K(c);N_GUARD,P_SPINP(e),S_FLIGHT::R1(I),XP(e)
      • Refutation
        • P(e);XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(b),P_SPINP(e),S_FLIGHT::R1(I),XP(e)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XQ(A)
    • Try
      • Q(A);XP(f)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(G)::QAR1(A)
        • K(c);N_GUARD,N_SPINP(b),P_SPINP(e),S_FLIGHT,XR(I)::QAR1(A),XP(e)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • R1(I),XP(e)
      • Vars
        • K(c);N_SPINP(b),P_SPINP(e),S_FLIGHT::R1(I),XP(e)
        • P(e);N_GUARD,XP(G)::R1(F),XP(b)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT,XR(I)
  • Actual
    • S(C);
    • Vars
      • K(c);N_GUARD,S_FLIGHT::QAB(A)
      • K(c);N_GUARD,N_SPINP(b),S_FLIGHT::B(B)
      • K(c);N_SPINP(b),OGATEB,S_FLIGHT,XR(I)::QAB1(A)
      • K(c);N_GUARD,N_SPINP(b),P_SPINP(e),S_FLIGHT::R1(I),XP(e)
      • P(e);SBLOCK,XP(G)::S(C)
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