MESON Chess Problem Database

Problem Display
PID: 259665 (1BBr1R1b/3n4/1p2qNPK/R2r1kpN/6p1/8/1Q2n3/3b4 w - - 0 1)

Somma, Francesco

Il Problema, 1932

1BBr1R1b/3n4/1p2qNPK/R2r1kpN/6p1/8/1Q2n3/3b4

#2

9 + 11

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg7+
      • 2.Sxg7#
    • 1...Sc1
      • 2.Sg3#
    • 1...Sg1
      • 2.Sg3#
    • 1...Sc3
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Sd4
      • 2.Sg3#
    • 1...Sf4
      • 2.Sg3#
  • Tries
    • 1.Rxd5+?
      • 1...Qe5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Se5
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Qxd5!
    • 1.Qb1+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Bc2!
    • 1.Qc2+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Bxc2!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qxg4#
      • 1...Bg7+
        • 2.Sxg7#
      • 1...Qxf6
        • 2.Qxd5#
      • 1...Bxf6
        • 2.Sg7#
      • 1...Sxd4
        • 2.Sg3#
      • 1...Sxf6
        • 2.Qd3#
      • 1...Sxb8
        • 2.Qe4#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qd6
        • 2.Qe4#
      • 1...Sc1
        • 2.Sg3#
      • 1...Sg1
        • 2.Sg3#
      • 1...Sc3
        • 2.Sg3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Sf4
        • 2.Sg3#
      • 1...Se5
        • 2.Qe4#
      • 1...g3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • B(k);CHECK,N_GUARD::S(C),XB(k)
    • S(b);N_GUARD::S(C)
    • S(b);N_GUARD::S(C),XS(b)
  • Tries
    • Try
      • R(B);CHECK,XR(d)
      • Refutation
        • Q(h);P_SPINS(i),XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h),P_SPINS(i)::QAB1(A),XQ(h)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h),P_SPINS(i)::QAB1(A),XQ(h)
      • Refutation
        • B(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XP(c)
    • Vars
      • B(k);CHECK,N_GUARD::S(C),XB(k)
      • Q(h);N_GUARD,P_PINP(E),P_SPINQ(h),P_SPINS(i),XS(D)::QAR2(A),XR(d)
      • B(k);N_GUARD,P_SPINB(k),XS(D)::S(C)
      • S(b);N_GUARD,XQ(A)::S(C)
      • S(i);P_SPINQ(h),P_SPINS(i),XS(D)::QAB(A)
      • S(i);P_SPINQ(h),XB(G)::QAB1(A)
      • Q(h);N_GUARD,P_SPINS(i)::QAB1(A),XQ(h)
      • Q(h);N_GUARD,P_SPINS(i)::QAB1(A)
      • S(b);N_GUARD::S(C)
      • S(b);N_GUARD::S(C),XS(b)
      • S(i);N_SPINR(d),P_SPINQ(h)::QAB1(A)
      • P(c);::QAB1(A)
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