MESON Chess Problem Database

Problem Display
PID: 269008 (1bK1R3/5p2/3k1N2/2pP2p1/r7/N2n1nRp/1rP4B/5b2 w - - 0 1)

Chicco, Adriano

4th Prize, Parallele 50, 1950

(First published on Fri Sep 29 1950)

1bK1R3/5p2/3k1N2/2pP2p1/r7/N2n1nRp/1rP4B/5b2

#2

8 + 11

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Sb5#
    • 1...Rxc2
      • 2.Sb5#
    • 1...Rb5
      • 2.Sxb5#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Ra5
      • 2.Sc4#
    • 1...Ra6
      • 2.Sc4#
    • 1...Ra7
      • 2.Sc4#
    • 1...Ra8
      • 2.Sc4#
    • 1...Sb4
      • 2.Rxf3#
    • 1...Sd4
      • 2.Rxd3#
  • Tries
    • 1.Rxf3+?
      • 1...Rf4
        • 2.Sc4#
      • 1...Se5
        • 2.Bxe5#
      • 1...Sf4!
    • 1.Rd8+?
      • 1...Ke7
        • 2.Sg8#
      • 1...Ke5!
  • Keys
    • 1.c4!
      • threat
        • 2.Se4#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...Re2
        • 2.Sb5#
      • 1...Sf2
        • 2.Rxf3#
      • 1...Sd2
        • 2.Rxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::S(C)
    • R(b);N_GUARD,XP(A)::S(C)
    • R(b);N_GUARD::S(C),XR(b)
    • R(f);N_GUARD::S(C),XR(f)
    • R(f);N_GUARD::S(C)
    • S(c);N_GUARD,S_CUTR(f)::B(B)+R(D),XS(d)
    • S(d);OGATE::B(B)+R(D),XS(c)
  • Tries
    • Try
      • R(D);CHECK,XS(d)
      • Vars
        • R(f);P_SPINR(f)::S(C)
        • S(c);N_GUARD,P_SPINS(c)::B(B),XS(c)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • R(H);CHECK
      • Vars
        • K(i);N_GUARD,S_FLIGHT::S(F)
      • Refutation
        • K(i);S_FLIGHT
  • Actual
    • P(A);
    • Threat
      • S(F)
    • Vars
      • R(f);XP(A)::S(C),XR(f)
      • R(b);N_GUARD::S(C)
      • S(c);N_GUARD,S_CUTR(b)::B(B)+R(D),XS(d)
      • S(d);OGATE::B(B)+R(D),XS(c)
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