MESON Chess Problem Database

Problem Display
PID: 267040 (5n2/1K3R2/p2NP3/3k4/QP6/6P1/b3r1r1/B1N1RB2 w - - 0 1)

Castellari, Umberto

Comm., Il Problema, 1931

5n2/1K3R2/p2NP3/3k4/QP6/6P1/b3r1r1/B1N1RB2

#2

11 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd6
      • 2.Qc6#
    • 1...Rd2
      • 2.Qc6#
    • 1...Ref2
      • 2.Qc6#
    • 1...Rxe6
      • 2.Qc6#
    • 1...Sxe6
      • 2.Qc6#
  • Tries
    • 1.Rd1+?
      • 1...Kxe6
        • 2.Qe8#
      • 1...Rd2!
    • 1.Rxe2?
      • threat
        • 2.Qd1#
        • 2.Qc6#
      • 1...Kxd6
        • 2.Qc6#
      • 1...Rxg3
        • 2.Qc6#
      • 1...Sxe6
        • 2.Qc6#
      • 1...Bb1
        • 2.Qc6#
      • 1...Bb3
        • 2.Qc6#
      • 1...Bc4
        • 2.Qc6#
      • 1...Rxe2!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qc6#
      • 1...Kc4
        • 2.Se3#
      • 1...Ke4
        • 2.Bxg2#
      • 1...Kxe6
        • 2.Qxa2#
      • 1...Rxe6
        • 2.Qa5#
      • 1...Rc2
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • K(d);N_GUARD,P-FLIGHT,XS(H)::QAR1(F)
    • R(b);::QAB1(F)
    • R(b);XP(I)::QAB1(F)
    • S(f);SBLOCK,XP(I)::QAB1(F)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);S_CUTR(b),S_FLIGHT,XP(I)::QAR2(F)
      • Refutation
        • R(b);P_SPINR(b)
    • Try
      • R(C);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);P-FLIGHT,XS(H)::QAR1(F)
        • R(c);XP(E)::QAB1(F)
        • S(f);XP(I)::QAB1(F)
        • B(a);::QAB1(F)
      • Refutation
        • R(c);XR(C)
  • Actual
    • S(H);
    • Threat
      • QAB1(F)
    • Vars
      • K(d);N_GUARD,P_SPINR(b),S_FLIGHT::S(H)
      • K(d);N_GUARD,P_SPINR(b),S_FLIGHT::B(D),XR(c)
      • K(d);N_GUARD,P_SPINR(b),S_FLIGHT,XP(I)::QAB(F),XB(a)
      • R(b);XP(I)::QAR(F)
      • R(b);OGATE::R1(C)
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