MESON Chess Problem Database

Problem Display
PID: 44063 (5QK1/1p5R/1rk3N1/3r1p1R/bPPp3p/5N2/6nb/4n1qB w - - 0 1)

Chicco, Adriano

4th HM., Het Schaakleven, 1931

5QK1/1p5R/1rk3N1/3r1p1R/bPPp3p/5N2/6nb/4n1qB

#2

9 + 12

133 The Problemist Supplement 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rd6
      • 2.Qc8#
    • 1...Rd7
      • 2.Qc5#
    • 1...Bd6
      • 2.Qe8#
    • 1...Se3
      • 2.Sxd4#
    • 1...Sf4
      • 2.Se5#
  • Tries
    • 1.Sxd4+?
      • 1...Rxd4
        • 2.Qc5#
      • 1...Qxd4!
    • 1.Qc8+?
      • 1...Bc7
        • 2.Qxc7#
      • 1...Kd6!
    • 1.Qe8+?
      • 1...Rd7
        • 2.Qxd7#
      • 1...Kd6!
  • Keys
    • 1.R5h6!
      • threat
        • 2.Sge5#
      • 1...Rd7
        • 2.Qc5#
      • 1...Re5
        • 2.Sgxe5#
      • 1...Rd6
        • 2.Qc8#
      • 1...Be5
        • 2.Sgxe5#
      • 1...Bd6
        • 2.Qe8#
      • 1...Se3
        • 2.Sxd4#
      • 1...Sf4
        • 2.Se5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(h);N_GUARD::QAR1(H),XR(h)
    • R(h);SBLOCK,S_CUTB(d)::QAR2(H)
    • R(h);N_GUARD::QAR1(H)
    • B(d);SBLOCK,S_CUTR(h)::QAB(H)
    • S(c);P_PINS(F),S_CUTQ(b),S_CUTR(h)::S(B),XP(f)
    • S(c);P_PINS(F),S_CUTB(d),S_CUTR(h)::S(B)
  • Tries
    • Try
      • S(B);CHECK,XP(f)
      • Vars
        • R(h);P_SPINS(c),XS(B)::QAR1(H)
      • Refutation
        • Q(b);XS(B)
    • Try
      • Q(H);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::QAR1(H),XB(d)
      • Refutation
        • K(k);P-FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::QAB1(H),XR(h)
      • Refutation
        • K(k);P-FLIGHT
  • Actual
    • R(E);
    • Threat
      • R(E)+S(F),DCHECK
    • Vars
      • R(h);N_GUARD::QAR1(H)
      • R(h);::R(E)+S(F),DCHECK,XR(h)
      • R(h);SBLOCK,S_CUTB(d)::QAR2(H)
      • B(d);::R(E)+S(F),DCHECK,XB(d)
      • B(d);SBLOCK,S_CUTR(h)::QAB(H)
      • S(c);P_PINS(F),S_CUTQ(b),S_CUTR(h)::S(B),XP(f)
      • S(c);P_PINS(F),S_CUTB(d),S_CUTR(h)::S(B)
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