MESON Chess Problem Database

Problem Display
PID: 260859 (8/1p6/n6Q/4k3/2R1P1b1/3p4/1K1NnP2/8 w - - 0 1)

de Barbieri, Vittorio

Otago Witness, 1904

(First published on Wed Oct 26 1904)

8/1p6/n6Q/4k3/2R1P1b1/3p4/1K1NnP2/8

#2

6 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sxf3#
    • 1...Bh3
      • 2.Sf3#
    • 1...Bf5
      • 2.Sf3#
    • 1...Bd7
      • 2.Sf3#
    • 1...Bc8
      • 2.Sf3#
    • 1...Sc1
      • 2.f4#
    • 1...Sg1
      • 2.f4#
    • 1...Sc3
      • 2.f4#
    • 1...Sg3
      • 2.f4#
    • 1...Sd4
      • 2.f4#
  • Tries
    • 1.Rc5+?
      • 1...Kd4
        • 2.Rd5#
        • 2.Qe3#
        • 2.Qd6#
      • 1...Sxc5!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rd5#
        • 2.Qd6#
      • 1...Kxd4
        • 2.Qd6#
      • 1...Sxd4
        • 2.f4#
      • 1...Be6
        • 2.Sf3#
      • 1...Sc3
        • 2.Qd6#
      • 1...Sf4
        • 2.Qd6#
      • 1...Sb4
        • 2.Qd6#
      • 1...Sc7
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 8
  • Sets
    • B(c);N_GUARD::S(B),XB(c)
    • B(c);N_GUARD::S(B)
    • S(a);N_GUARD::P(C)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • S(e);XR(D)
  • Actual
    • R(D);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT,XR(D)::QAR2(F)
      • S(a);N_GUARD,SBLOCK,XR(D)::P(C)
      • B(c);N_GUARD::S(B)
      • S(a);::QAB1(F)
      • S(a);SBLOCK::QAB1(F)
      • S(e);::QAB1(F)
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