MESON Chess Problem Database

Problem Display
PID: 265919 (6B1/4N3/1rR1pP1R/4kN2/4p3/p3p1K1/1qrP4/B5Qb w - - 0 1)

Castellari, Umberto

6th Prize, Gruppo Problemistico Italiano, 1935-1936

6B1/4N3/1rR1pP1R/4kN2/4p3/p3p1K1/1qrP4/B5Qb

#2

10 + 9

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc3
      • 2.Rc5#
    • 1...Qd4
      • 2.Bxd4#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Rb3
      • 2.Rxe6#
    • 1...Rb4
      • 2.Rxe6#
    • 1...Rb5
      • 2.Rxe6#
    • 1...Rb7
      • 2.Rxe6#
    • 1...Rb8
      • 2.Rxe6#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Qh2#
        • 2.Qg3#
      • 1...Kf4
        • 2.Qg3#
      • 1...Rxd2
        • 2.Qg3#
      • 1...Bg2
        • 2.Qh2#
      • 1...exf5!
    • 1.Bxb2+?
      • 1...Rcxb2
        • 2.Rc5#
      • 1...Rc3
        • 2.Bxc3#
        • 2.Rc5#
      • 1...Rbxb2
        • 2.Rxe6#
      • 1...axb2!
    • 1.d4+?
      • 1...Qxd4
        • 2.Bxd4#
      • 1...exd4 ep!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Qf4#
      • 1...exf5
        • 2.Sg6#
      • 1...Qc3
        • 2.Rc5#
      • 1...Rc3
        • 2.d4#
      • 1...Rb3
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • Q(b);S_CUTR(c)::R(F)
    • Q(b);OGATE::B(A),XQ(b)
    • R(c);N_GUARD::R(F),XR(c)
    • R(h);N_GUARD::R1(F),XP(i)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(g);N_SPINQ(b),S_FLIGHT::QAB1(B)
        • R(c);XP(C)::QAB(B)
        • B(a);::QAB(B)
      • Refutation
        • P(i);XS(E)
    • Try
      • B(A);CHECK,XQ(b)
      • Vars
        • R(c);XB(A)::R(F)
        • R(h);XB(A)::R1(F),XP(i)
      • Refutation
        • P(d);XB(A)
    • Try
      • P(C);CHECK,N_PINQ(b)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XP(C)::B(A),XQ(b)
      • Refutation
        • P(f);EP,P_SPINQ(b),XP(C)
  • Actual
    • Q(B);P_PINP(f),XP(e)
    • Threat
      • QAB1(B)
    • Vars
      • P(i);SBLOCK,XS(E)::S(I)
      • Q(b);P_PINQ(B),S_CUTR(c)::R(F)
      • R(c);N_SPINQ(b),P_PINQ(B),S_CUTQ(b)::P(C)
      • R(h);N_GUARD,P_PINQ(B)::R1(F),XP(i)
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