MESON Chess Problem Database

Problem Display
PID: 164743 (kBN1K3/1R1Pp3/2n5/1P1B4/q7/8/8/8 w - - 0 1)

Palkoska, Emil

Deutsches Wochenschach, 1903

kBN1K3/1R1Pp3/2n5/1P1B4/q7/8/8/8

#2

7 + 4

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Sb6#
    • 1...Sd4
      • 2.Sb6#
    • 1...Sa5
      • 2.Sb6#
    • 1...Se5
      • 2.Sb6#
    • 1...Sa7
      • 2.Sb6#
    • 1...Sxb8
      • 2.Sb6#
      • 2.Ra7#
    • 1...Sd8
      • 2.Sb6#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Rb8#
      • 1...Kxb7
        • 2.Bxc6#
      • 1...Qxb5
        • 2.Ra7#
      • 1...Qa7
        • 2.Rxa7#
      • 1...Sb8
        • 2.Sb6#
        • 2.Ra7#
        • 2.Rxb8#
      • 1...exd6!
    • 1.Bc7?
      • threat
        • 2.Rb8#
      • 1...Qxb5
        • 2.Ra7#
      • 1...Qa7
        • 2.Rxa7#
      • 1...Sb8
        • 2.Sb6#
        • 2.Ra7#
        • 2.Rxb8#
      • 1...Kxb7!
  • Keys
    • 1.Be5!
      • threat
        • 2.Rb8#
      • 1...Kxb7
        • 2.Bxc6#
      • 1...Qxb5
        • 2.Ra7#
      • 1...Sxe5
        • 2.Sb6#
      • 1...Qa7
        • 2.Rxa7#
      • 1...Sb8
        • 2.Sb6#
        • 2.Ra7#
        • 2.Rxb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(b);::S(F)
  • Tries
    • Try
      • B(E);
      • Threat
        • R1(C)
      • Vars
        • K(d);OGATEB,P_SPINS(b),S_FLIGHT,XR(C)::B(B),XS(b)
        • Q(a);N_GUARD,XP(A)::R1(C)
        • Q(a);N_GUARD::R1(C),XQ(a)
      • Refutation
        • P(c);XB(E)
    • Try
      • B(E);
      • Threat
        • R1(C)
      • Vars
        • Q(a);N_GUARD,XP(A)::R1(C)
        • Q(a);N_GUARD::R1(C),XQ(a)
      • Refutation
        • K(d);P_SPINS(b),S_FLIGHT,XR(C)
  • Actual
    • B(E);
    • Threat
      • R1(C)
    • Vars
      • K(d);OGATEB,P_SPINS(b),S_FLIGHT,XR(C)::B(B),XS(b)
      • Q(a);N_GUARD,XP(A)::R1(C)
      • S(b);XB(E)::S(F)
      • Q(a);N_GUARD::R1(C),XQ(a)
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