MESON Chess Problem Database

Problem Display
PID: 17171 (8/2p1K3/n1Q5/3R3p/5k2/3Pp3/4PNb1/8 w - - 0 1)

Onitiu, Valerian

Chemnitzer Tageblatt, 1925

8/2p1K3/n1Q5/3R3p/5k2/3Pp3/4PNb1/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.Qxc7#
    • 1...Sc5
      • 2.Qxc7#
    • 1...Sb8
      • 2.Qxc7#
  • Tries
    • 1.Rf5+?
      • 1...Kxf5
        • 2.Qf6#
      • 1...Kg3!
    • 1.Qg6?
      • threat
        • 2.Rf5#
        • 2.Qg5#
      • 1...exf2
        • 2.Qg5#
      • 1...Be4
        • 2.Sh3#
        • 2.Qg5#
      • 1...Bh3
        • 2.Sxh3#
        • 2.Qg5#
      • 1...Bxd5!
  • Keys
    • 1.Rg5!
      • threat
        • 2.Qf6#
      • 1...Kxg5
        • 2.Qf6#
      • 1...Bxc6
        • 2.Sh3#
      • 1...exf2
        • 2.Qc1#
      • 1...Bh3
        • 2.Sxh3#
      • 1...Be4
        • 2.Sh3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • S(e);N_GUARD::QAB(E),XP(f)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(c);P-FLIGHT,XR(D)::QAR1(E)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XS(B)::QAB1(E)
      • Refutation
        • B(a);XR(D)
  • Actual
    • R(D);
    • Threat
      • QAR2(E)
    • Vars
      • K(c);S_FLIGHT,XR(D)::QAB1(E)
      • B(a);N_GUARD,XQ(E)::S(B)
      • P(b);OGATEB,XS(B)::QAB(E)
      • B(a);N_GUARD::S(B),XB(a)
      • B(a);N_GUARD::S(B)
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