MESON Chess Problem Database

Problem Display
PID: 215535 (5b2/1p2p2K/2Q5/3Pr3/3Nk3/4Pp1N/5P1B/2nR1b2 w - - 0 1)

Caliani, Alfonso

Suomen Shakki, 1956

5b2/1p2p2K/2Q5/3Pr3/3Nk3/4Pp1N/5P1B/2nR1b2

#2

9 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Sg5#
    • 1...Rg5
      • 2.Sxg5#
    • 1...Re6
      • 2.Sg5#
      • 2.Qxe6#
  • Tries
    • 1.Qe6?
      • threat
        • 2.Sg5#
        • 2.Qxe5#
      • 1...Bxh3
        • 2.Qxe5#
      • 1...Bh6
        • 2.Qxe5#
      • 1...Bg7
        • 2.Sg5#
      • 1...Sd3
        • 2.Sg5#
      • 1...Rxe6!
    • 1.Qg6+?
      • 1...Rf5
        • 2.Qxf5#
      • 1...Kxd5!
    • 1.d6+?
      • 1...Rd5
        • 2.Sg5#
      • 1...bxc6!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sg3#
      • 1...Kxf5
        • 2.Qg6#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Rxf5
        • 2.Rd4#
      • 1...Re6
        • 2.Qxe6#
      • 1...Se2
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD,P_SPINR(e),XP(G)::S(E)
    • R(e);N_GUARD::S(E),XR(e)
  • Tries
    • Try
      • Q(H);P_PINR(e)
      • Threat
        • DUALS(2)
      • Vars
        • B(b);XS(E)::QAR1(H),XR(e)
        • B(h);::QAR1(H),XR(e)
        • B(h);::S(E)
        • S(a);::S(E)
      • Refutation
        • R(e);N_SPINR(e),XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e)::QAB1(H),XR(e)
      • Refutation
        • K(d);S_FLIGHT,XP(G)
    • Try
      • P(G);CHECK
      • Vars
        • R(e);P_SPINR(e)::S(E)
      • Refutation
        • P(f);XQ(H)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB1(H)
      • R(e);OGATE,P_SPINR(e),XP(G)::QAB1(H),XR(e)
      • R(e);SBLOCK,XS(F)::R1(A)
      • R(e);OGATEB::QAR2(H),XR(e)
      • S(a);N_GUARD,S_CUTB(b)::QAB(H)
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