MESON Chess Problem Database

Problem Display
PID: 262946 (7Q/R2n1p2/3kpr2/1P2R2p/4p1NB/K1P5/8/8 w - - 0 1)

Somma, Francesco

L'Echiquier, 1928

7Q/R2n1p2/3kpr2/1P2R2p/4p1NB/K1P5/8/8

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Qb8#
      • 2.Qf8#
    • 1...Sb6
      • 2.Qb8#
      • 2.Qf8#
    • 1...Sb8
      • 2.Qxb8#
      • 2.Qf8#
    • 1...Sf8
      • 2.Qxf8#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Sxe4#
        • 2.Se8#
      • 1...Ke7
        • 2.Rxd7#
      • 1...Sxe5
        • 2.Qf8#
      • 1...Sxf6
        • 2.Qb8#
      • 1...Sc5
        • 2.Se8#
        • 2.Qb8#
      • 1...e3
        • 2.Se4#
        • 2.Se8#
      • 1...Kxe5!
    • 1.Qb8+?
      • 1...Ke7
        • 2.Bxf6#
      • 1...Sxb8!
  • Keys
    • 1.Se3!
      • 1...Kxe5
        • 2.Bg3#
      • 1...Ke7
        • 2.Sf5#
      • 1...Sxe5
        • 2.Qf8#
      • 1...Rf1
        • 2.Sc4#
      • 1...Rf2
        • 2.Sc4#
      • 1...Rf3
        • 2.Sc4#
      • 1...Rf4
        • 2.Sc4#
      • 1...Rf5
        • 2.Sc4#
      • 1...Rg6
        • 2.Sc4#
      • 1...Rh6
        • 2.Sc4#
      • 1...Sc5
        • 2.Sc4#
        • 2.Qb8#
      • 1...Sb6
        • 2.Qb8#
      • 1...Sb8
        • 2.Sc4#
        • 2.Qxb8#
      • 1...Sf8
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • S(f);N_GUARD::QAB(H),XS(f)
  • Tries
    • Try
      • S(C);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);N_GUARD,P_SPINP(d),P_SPINS(f),S_FLIGHT::R1(G),XS(f)
        • S(f);N_GUARD,SBLOCK,XR(F)::QAB(H)
        • S(f);N_GUARD,XS(C)::QAB(H)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);P_SPINP(d),P_SPINR(e),P_SPINS(f),S_FLIGHT::B(D),XR(e)
      • Refutation
        • S(f);XQ(H)
  • Actual
    • S(C);
    • Vars
      • K(c);OGATEB,P_SPINR(e),S_FLIGHT,XR(F)::B(D)
      • K(c);N_GUARD,P_SPINP(d),P_SPINR(e),P_SPINS(f),S_FLIGHT::S(C)
      • S(f);N_GUARD,SBLOCK,XR(F)::QAB(H)
      • R(e);::S(C)
      • S(f);N_GUARD::QAB(H)
      • S(f);::S(C)
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