MESON Chess Problem Database

Problem Display
PID: 262001 (K7/5n2/3p4/3Q1N2/R3Pk1P/3p1q1P/8/4nRN1 w - - 0 1)

Somma, Francesco

Il Problema, 1933

K7/5n2/3p4/3Q1N2/R3Pk1P/3p1q1P/8/4nRN1

#2

9 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Rxf3#
    • 1...Sg2
      • 2.Rxf3#
    • 1...Sg5
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qxd6#
    • 1...Sh8
      • 2.Qxd6#
    • 1...d2
      • 2.Se2#
  • Tries
    • 1.Qxd6+?
      • 1...Se5
        • 2.Qh6#
      • 1...Sxd6!
  • Keys
    • 1.Qe6!
      • 1...Qxf1
        • 2.e5#
      • 1...Se5
        • 2.Qh6#
      • 1...Qf2
        • 2.e5#
      • 1...Sc2
        • 2.Rxf3#
      • 1...Sg2
        • 2.Rxf3#
      • 1...Sg5
        • 2.Qxd6#
      • 1...Sh6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qxd6#
      • 1...Sh8
        • 2.Qxd6#
      • 1...d2
        • 2.Se2#
      • 1...d5
        • 2.exd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::R1(A),XQ(c)
    • S(f);N_GUARD::QAB(G),XP(e)
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • Q(G);CHECK,P_SPINP(E),XP(e)
      • Vars
        • S(f);N_GUARD,P_SPINS(f),SBLOCK::QAB(G)
      • Refutation
        • S(f);XQ(G)
  • Actual
    • Q(G);P_SPINP(E)
    • Vars
      • Q(c);N_PINP(E),N_SPINQ(c),XR(A)::R(D)+P(E)
      • S(f);N_GUARD,SBLOCK::QAB(G)
      • Q(c);N_PINP(E)::R(D)+P(E)
      • S(a);N_GUARD::R1(A),XQ(c)
      • S(f);N_GUARD::QAB(G),XP(e)
      • P(b);N_GUARD::S(B)
      • P(e);N_PINP(E)::R(D)+P(E),XP(e)
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