MESON Chess Problem Database

Problem Display
PID: 240222 (2b2B2/2P2p2/1N1K1p2/1R2n3/p1P2n2/k2N3R/5Q2/rr6 w - - 0 1)

Cristoffanini, Guido

1st Prize, Tijdschrift vd KNSB, 1932

2b2B2/2P2p2/1N1K1p2/1R2n3/p1P2n2/k2N3R/5Q2/rr6

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Qb2#
    • 1...Rd1
      • 2.Qb2#
    • 1...Re1
      • 2.Qb2#
    • 1...Rf1
      • 2.Qb2#
    • 1...Rg1
      • 2.Qb2#
    • 1...Rh1
      • 2.Qb2#
    • 1...Rb2
      • 2.Qxb2#
    • 1...Sxc4+
      • 2.Sxc4#
  • Keys
    • 1.Rb2!
      • threat
        • 2.Qc5#
      • 1...Sxc4+
        • 2.Sxc4#
      • 1...Rxb2
        • 2.Qxb2#
      • 1...Sfxd3
        • 2.Kd5#
      • 1...Sexd3
        • 2.Kc6#
      • 1...Sd5
        • 2.Kxd5#
      • 1...Se6
        • 2.Sxe5#
      • 1...Sc6
        • 2.Kxc6#
      • 1...Sd7
        • 2.Sxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAB1(A)
    • R(b);N_GUARD,P_PINS(B)::QAB1(A)
    • R(b);N_GUARD::QAB1(A),XR(b)
    • S(f);CHECK,XP(D)::S(F),XS(f)
  • Actual
    • R(E);
    • Threat
      • QAB(A)
    • Vars
      • S(f);CHECK,XP(D)::S(F),XS(f)
      • R(b);OGATE,XR(E)::QAB1(A),XR(b)
      • S(e);P_SPINS(e),XS(B)::B(I)+K(G)
      • S(f);P_SPINS(f),XS(B)::B(I)+K(G)
      • S(e);::B(I)+K(G),XS(e)
      • S(e);N_GUARD,S_CUTB(i)::R(C)+S(B),XS(f)
      • S(f);::B(I)+K(G),XS(f)
      • S(f);N_GUARD,S_CUTB(i)::R(C)+S(B),XS(e)
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