MESON Chess Problem Database

Problem Display
PID: 248237 (1b4K1/8/B7/3Q4/r1n3p1/3np1B1/qR1pk1NN/3b1R2 w - - 0 1)

de Blasio, Francis JC

25th Place, Match: Netherlands - USA, 1949-1950

1b4K1/8/B7/3Q4/r1n3p1/3np1B1/qR1pk1NN/3b1R2

#2

8 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Re1#
    • 1...Se1
      • 2.Rxe1#
    • 1...Sf2
      • 2.Re1#
    • 1...Sb4
      • 2.Re1#
    • 1...Sf4
      • 2.Re1#
    • 1...Sc5
      • 2.Re1#
    • 1...Sde5
      • 2.Sf4#
      • 2.Re1#
    • 1...Sa3
      • 2.Bxd3#
      • 2.Re1#
    • 1...Sa5
      • 2.Bxd3#
      • 2.Re1#
    • 1...Sce5
      • 2.Re1#
    • 1...Sb6
      • 2.Bxd3#
      • 2.Re1#
    • 1...Sd6
      • 2.Bxd3#
      • 2.Re1#
  • Tries
    • 1.Sf4+?
      • 1...Sxf4
        • 2.Re1#
      • 1...Bxf4!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qxg4#
      • 1...Sdxb2
        • 2.Qxe3#
      • 1...Scxb2
        • 2.Rf2#
      • 1...Sc1
        • 2.Qxe3#
      • 1...Se1
        • 2.Qxe3#
      • 1...Sf2
        • 2.Qxe3#
      • 1...Sb4
        • 2.Qxe3#
      • 1...Sf4
        • 2.Qxe3#
      • 1...Sc5
        • 2.Qxe3#
      • 1...Sde5
        • 2.Sf4#
      • 1...Sa3
        • 2.Re1#
        • 2.Rf2#
      • 1...Sa5
        • 2.Re1#
        • 2.Rf2#
      • 1...Sce5
        • 2.Re1#
      • 1...Sb6
        • 2.Re1#
        • 2.Rf2#
      • 1...Sd6
        • 2.Re1#
        • 2.Rf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);N_GUARD,P_SPINS(h)::R1(A)
    • S(e);N_GUARD,P_SPINS(h)::R1(A),XS(e)
    • S(h);P_PINQ(F),P_SPINS(e)::R1(A)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • S(e);P_SPINS(h),XS(C)::R1(A)
      • Refutation
        • B(j);XS(C)
  • Actual
    • Q(F);
    • Threat
      • QAB(F),XP(i)
    • Vars
      • S(e);N_SPINP(c),P_SPINP(f),P_SPINS(h),XR(B)::QAR1(F),XP(f)
      • S(h);N_SPINP(c),P_PINQ(F),P_SPINP(f),P_SPINS(e),XR(B)::R1(A)
      • S(e);P_SPINS(h)::QAR1(F),XP(f)
      • S(e);N_GUARD,P_SPINS(h),S_CUTB(j)::S(C)
      • S(h);P_PINQ(F),P_SPINS(e)::R1(A)
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