MESON Chess Problem Database

Problem Display
PID: 239790 (B7/1r2QK2/b3Pn2/1Pn2R1p/1b2k2r/2p2R2/4P3/6B1 w - - 0 1)

Cristoffanini, Guido

Revista Romana de Sah, 1928

B7/1r2QK2/b3Pn2/1Pn2R1p/1b2k2r/2p2R2/4P3/6B1

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.R3f4#
    • 1...Rh2
      • 2.R3f4#
    • 1...Rh3
      • 2.R3f4#
    • 1...Rf4
      • 2.R3xf4#
    • 1...Sd3
      • 2.exd3#
    • 1...Scd7
      • 2.Qxb4#
    • 1...Sg4
      • 2.R3f4#
    • 1...Sfd7
      • 2.Qxh4#
  • Tries
    • 1.Kxf6?
      • threat
        • 2.Re5#
      • 1...Rf4
        • 2.R3xf4#
      • 1...Sd3
        • 2.exd3#
      • 1...Sd7+!
    • 1.Bxb7+?
      • 1...Sxb7
        • 2.Qxb4#
      • 1...Sd5
        • 2.Bxd5#
        • 2.Qxh4#
      • 1...Bxb7!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Re5#
      • 1...Sd3
        • 2.exd3#
      • 1...Scd7
        • 2.Qc4#
      • 1...Sg4
        • 2.R3f4#
      • 1...Sfd7
        • 2.Qc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD::R1(C)
    • R(d);N_GUARD::R1(C),XR(d)
    • S(e);OGATE::P(B),XS(e)
    • S(e);N_PINQ(G)::QAR(G),XB(b)
    • S(h);S_CUTR(d)::R1(C)
    • S(h);N_PINQ(G)::QAR(G),XR(d)
  • Tries
    • Try
      • K(H);N_SPINQ(G),P-FLIGHT,XS(h)
      • Threat
        • R1(E)
      • Vars
        • R(d);N_GUARD,P_PINR(E)::R1(C),XR(d)
        • S(e);OGATE::P(B),XS(e)
      • Refutation
        • S(e);CHECK
    • Try
      • B(I);CHECK,N_SPINQ(G),XR(i)
      • Vars
        • S(e);OGATE,XB(I)::QAR(G),XB(b)
      • Refutation
        • B(g);XB(I)
  • Actual
    • Q(G);
    • Threat
      • R1(E)
    • Vars
      • S(e);OGATE::P(B),XS(e)
      • S(e);N_PINQ(G)::QAR2(G)
      • S(h);S_CUTR(d)::R1(C)
      • S(h);N_PINQ(G)::QAB(G)
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