MESON Chess Problem Database

Problem Display
PID: 262691 (5B2/1K2n3/Q3p3/2RnR3/1pNkp3/1P5N/8/1B6 w - - 0 1)

Offerstrom, Augusta

The Field, 1889

(First published on Sat Apr 13 1889)

5B2/1K2n3/Q3p3/2RnR3/1pNkp3/1P5N/8/1B6

#2

9 + 6

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc5
      • 2.Qb6#
    • 1...Se3
      • 2.Qa1#
    • 1...Sf4
      • 2.Qa1#
    • 1...Sb6
      • 2.Qa1#
    • 1...Sf6
      • 2.Qa1#
    • 1...Sc7
      • 2.Qa1#
  • Tries
    • 1.Bg7?
      • threat
        • 2.Rexd5#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Sc3
        • 2.Red5#
      • 1...Se3
        • 2.Red5#
        • 2.Qa1#
      • 1...Sf4
        • 2.Red5#
        • 2.Qa1#
      • 1...Sb6
        • 2.Red5#
        • 2.Qa1#
      • 1...Sf6
        • 2.Qa1#
      • 1...Sc7
        • 2.Red5#
        • 2.Qa1#
      • 1...Kc3!
    • 1.Rxe4+?
      • 1...Kxc5
        • 2.Qa5#
        • 2.Qc6#
      • 1...Kc3!
  • Keys
    • 1.Se3!
      • 1...Kxe3
        • 2.Qd3#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Kxe5
        • 2.Bg7#
      • 1...Sxe3
        • 2.Qa1#
      • 1...Sc3
        • 2.Sc2#
      • 1...Sf4
        • 2.Sc2#
      • 1...Sb6
        • 2.Sc2#
      • 1...Sf6
        • 2.Sc2#
      • 1...Sc7
        • 2.Sc2#
      • 1...Sf5
        • 2.Rxe4#
      • 1...Sc6
        • 2.Rxe4#
      • 1...Sg6
        • 2.Rxe4#
      • 1...Sc8
        • 2.Rxe4#
      • 1...Sg8
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XR(E)::QAB1(G)
    • S(d);N_GUARD::QAB(G)
  • Tries
    • Try
      • B(I);
      • Threat
        • B(I)+R(F),DCHECK,XS(d)
      • Vars
        • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XR(E)::QAB1(G)
        • S(d);SBLOCK::B(I)+R(F),DCHECK
        • S(d);N_GUARD::QAB(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(b);N_GUARD,P_SPINP(c),S_FLIGHT,XS(D)::QAR1(G)
      • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XR(E)::QAB1(G)
      • K(b);OGATEB,P_SPINS(d),S_FLIGHT,XR(F)::B(I)
      • S(d);N_GUARD,SBLOCK,XS(D)::QAB(G)
      • S(d);::S(D)
      • S(f);::R1(F),XP(c)
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