MESON Chess Problem Database

Problem Display
PID: 233840 (B2n1Q2/8/4bR2/R1qnk3/3N2p1/B1P1p1K1/1N6/8 w - - 0 1)

Cristoffanini, Guido

1st HM., Skakbladet, 1932

B2n1Q2/8/4bR2/R1qnk3/3N2p1/B1P1p1K1/1N6/8

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Sd3#
    • 1...Sxf6
      • 2.Sd3#
    • 1...Sc7
      • 2.Sd3#
    • 1...Sc6
      • 2.Rxe6#
    • 1...Sb7
      • 2.Rxe6#
    • 1...Sf7
      • 2.Rxe6#
  • Tries
    • 1.Sf3+?
      • 1...Ke4
        • 2.Rf4#
      • 1...gxf3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rxe6#
      • 1...Ke4
        • 2.Rf4#
      • 1...Kd6
        • 2.Sc4#
      • 1...Qxd4
        • 2.Rf4#
      • 1...Sxf6
        • 2.Qc7#
      • 1...Bf5
        • 2.Re6#
      • 1...Bd7
        • 2.Re6#
      • 1...Bf7
        • 2.Re6#
      • 1...Bc8
        • 2.Re6#
      • 1...Bg8
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 5
  • Sets
    • S(d);P_SPINQ(c)::S(A)
    • S(d);P_SPINQ(c),XR(G)::S(A)
    • S(g);N_GUARD::R1(G),XB(f)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P-FLIGHT,P_SPINS(d)::R1(G)
      • Refutation
        • P(b);XS(E)
  • Actual
    • Q(I);
    • Threat
      • QAB(I)+R(G),DCHECK,XB(f)
    • Vars
      • K(e);P-FLIGHT,P_SPINS(d)::R1(G)
      • K(e);P_SPINB(f),P_SPINQ(c),S_FLIGHT::S(A)
      • Q(c);P_SPINS(d),XS(E)::QAB(I)+R(G)
      • S(d);N_GUARD,P_SPINQ(c),P_SPINS(d),SBLOCK,XR(G)::QAB(I)
      • B(f);::QAB(I)+R(G),DCHECK
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