MESON Chess Problem Database

Problem Display
PID: 185874 (3n4/Q5Nk/1K3B2/6P1/8/8/B7/8 w - - 0 1)

Toma, G

Chess, 1957

3n4/Q5Nk/1K3B2/6P1/8/8/B7/8

#2

6 + 2

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kg6
      • 2.Bb1#
    • 1...Kh8
      • 2.Sf5#
      • 2.Sh5#
      • 2.Se8#
  • Tries
    • 1.Se6+?
      • 1...Kg8
        • 2.Qg7#
      • 1...Sb7
        • 2.Sf8#
      • 1...Sf7
        • 2.Qxf7#
      • 1...Kg6!
    • 1.Bxd8?
      • 1...Kg6
        • 2.Bb1#
      • 1...Kh8!
    • 1.Qb8?
      • 1...Kh8
        • 2.Qh2#
      • 1...Sb7
        • 2.Bb1#
      • 1...Sc6
        • 2.Bb1#
      • 1...Se6
        • 2.Bb1#
      • 1...Sf7
        • 2.Bb1#
      • 1...Kg6!
    • 1.Qf7?
      • threat
        • 2.Qh5#
      • 1...Kh8
        • 2.Sf5#
        • 2.Sh5#
        • 2.Se6#
        • 2.Se8#
        • 2.Qh5#
        • 2.Qg8#
      • 1...Se6
        • 2.Sxe6#
      • 1...Sxf7!
  • Keys
    • 1.Qa8!
      • 1...Kg6
        • 2.Qe4#
      • 1...Kh8
        • 2.Qh1#
      • 1...Sb7
        • 2.Bb1#
      • 1...Sc6
        • 2.Bb1#
      • 1...Se6
        • 2.Bb1#
      • 1...Sf7
        • 2.Bb1#

Anticipated by 31190(1904)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(A)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(E)
        • S(b);P_SPINS(b)::S(F)
        • S(b);N_GUARD,P_SPINS(b)::QAR2(E),XS(b)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);XS(b)
      • Vars
        • K(a);S_FLIGHT::B(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAR(E)
        • S(b);::B(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • S(b);N_GUARD::QAR(E)+S(F),XS(b)
      • Refutation
        • S(b);XQ(E)
  • Actual
    • Q(E);
    • Vars
      • K(a);S_FLIGHT::QAB(E)
      • K(a);P-FLIGHT,P_SPINS(b)::QAB(E)
      • S(b);::B(A)
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