MESON Chess Problem Database

Problem Display
PID: 239796 (B3RR2/B4n1p/2n3P1/2Q1NNPK/q4kp1/r2p4/6PP/2b5 w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1931

B3RR2/B4n1p/2n3P1/2Q1NNPK/q4kp1/r2p4/6PP/2b5

#2

12 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxd3#
    • 1...Ra2
      • 2.Sxd3#
    • 1...Sb4
      • 2.Qf2#
    • 1...Sa5
      • 2.Qf2#
    • 1...Sxa7
      • 2.Qf2#
    • 1...Sb8
      • 2.Qf2#
    • 1...Scd8
      • 2.Qf2#
    • 1...Sd6
      • 2.Sxd6#
    • 1...hxg6+
      • 2.Sxg6#
  • Tries
    • 1.Qe3+?
      • 1...Kxf5
        • 2.Rxf7#
      • 1...Bxe3!
    • 1.g3+?
      • 1...Kxf5
        • 2.Sxc6#
      • 1...Ke4!
  • Keys
    • 1.Bb8!
      • threat
        • 2.Sxd3#
      • 1...hxg6+
        • 2.Sxg6#
      • 1...Ke4
        • 2.Sxf7#
      • 1...Kxf5
        • 2.Sxc6#
      • 1...Scxe5
        • 2.Qf2#
      • 1...Sxb8
        • 2.Qf2#
      • 1...Sfxe5
        • 2.Sg3#
      • 1...Sd6
        • 2.Sxd6#
      • 1...d2
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::S(D),XP(c)
    • S(g);::QAR2(C)
    • S(g);XB(I)::QAR2(C)
    • S(h);::R(L)+S(E),XS(h)
    • P(i);CHECK,XP(H)::S(D),XP(i)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(h),XS(E)::R(L),XS(h)
      • Refutation
        • B(a);XQ(C)
    • Try
      • P(A);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(h),XS(E)::QAR(C)+S(D),XS(g)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(g)
  • Actual
    • B(I);
    • Threat
      • B(I)+S(D),DCHECK,XP(c)
    • Vars
      • P(i);CHECK,XP(H)::B(I)+S(D),DCHECK,XP(i)
      • K(e);P-FLIGHT,P_SPINS(g)::R(K)+S(D),XS(h)
      • K(e);P-FLIGHT,P_SPINS(h),XS(E)::QAR(C)+S(D),XS(g)
      • S(g);P_SPINS(g),XS(D)::QAR2(C)
      • S(g);XB(I)::QAR2(C)
      • S(h);P_SPINS(h),XS(D)::R(L)+S(E)
      • S(h);::R(L)+S(E),XS(h)
      • P(c);::B(I)+S(D),DCHECK
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