MESON Chess Problem Database

Problem Display
PID: 239805 (2n4B/2prrb2/2pPpp1q/3Nk1PQ/R5P1/2P1N3/5P1b/3KR3 w - - 0 1)

Cristoffanini, Guido

Nepszava, 1932

2n4B/2prrb2/2pPpp1q/3Nk1PQ/R5P1/2P1N3/5P1b/3KR3

#2

12 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qg7
      • 2.Qxh2#
    • 1...Qf8
      • 2.Qxh2#
    • 1...Qg6
      • 2.Qxh2#
    • 1...cxd5
      • 2.Sf5#
    • 1...exd5
      • 2.Sf5#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sc4#
        • 2.Sf5#
      • 1...Qxg5
        • 2.Sc4#
      • 1...Sxd6
        • 2.Sc4#
      • 1...Bf4
        • 2.Sc4#
      • 1...Kxd6!
  • Keys
    • 1.Sxf6!
      • threat
        • 2.Sf5#
      • 1...Rxd6+
        • 2.Sed5#
      • 1...Kxd6
        • 2.Se4#
      • 1...Qxg5
        • 2.Se8#
      • 1...Qxf6
        • 2.Qxh2#
      • 1...Sxd6
        • 2.Sxd7#
      • 1...Bf4
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • Q(f);N_GUARD,N_SPINP(e)::QAB(J),XB(a)
    • Q(f);N_GUARD::QAB(J),XB(a)
    • P(c);SBLOCK,XS(H)::R(B)+S(E)
    • P(d);SBLOCK,XS(H)::R(B)+S(E)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);P_SPINQ(f),XP(I)::R(B)+S(E),DCHECK
        • S(k);XP(K)::R(B)+S(E),DCHECK
        • B(a);::R(B)+S(E),DCHECK
      • Refutation
        • K(b);N_SPINP(e),S_FLIGHT,XP(K)
  • Actual
    • S(H);P_SPINP(K),XP(e)
    • Threat
      • R(B)+S(E)
    • Vars
      • R(h);CHECK,SBLOCK,XP(K)::R(B)+S(E)
      • K(b);S_FLIGHT,XP(K)::S(H)
      • Q(f);N_GUARD,P_SPINQ(f),XP(I)::B(L)+S(H)
      • Q(f);N_GUARD,P_SPINQ(f),XS(H)::QAB(J),XB(a)
      • S(k);SBLOCK,XP(K)::B(L)+S(H),DCHECK,XR(h)
      • B(a);SBLOCK::R(B)+S(E),DCHECK
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