MESON Chess Problem Database

Problem Display
PID: 48131 (6B1/8/QR2r3/1NP5/2kP4/2n2K2/8/1R2B3 w - - 0 1)

Cacciari, Europe

1st Prize, Enigmistica Popolare, 1936

6B1/8/QR2r3/1NP5/2kP4/2n2K2/8/1R2B3

#2

9 + 3

3310 2345 Chess Problems 1997
56 The Problemist 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Bxe6#
  • Tries
    • 1.Sa3+?
      • 1...Kd5
        • 2.Rd6#
        • 2.Qc4#
      • 1...Kxd4!
    • 1.Sd6+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxd4!
    • 1.Bxc3?
      • 1...Kd5
        • 2.Sc7#
        • 2.Bxe6#
        • 2.Qa2#
      • 1...Kd3!
    • 1.Rb4+?
      • 1...Kxb4
        • 2.Sd6#
      • 1...Kd5
        • 2.Sxc3#
        • 2.Sc7#
        • 2.Bxe6#
        • 2.Rd6#
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kd3!
    • 1.Qa3?
      • 1...Kd3
        • 2.Qxc3#
      • 1...Kd5
        • 2.Bxe6#
        • 2.Qb3#
      • 1...Sxb1
        • 2.Bxe6#
      • 1...Sd1
        • 2.Bxe6#
        • 2.Qb3#
      • 1...Sa2
        • 2.Bxe6#
        • 2.Qb3#
      • 1...Se2
        • 2.Bxe6#
        • 2.Qb3#
      • 1...Sa4
        • 2.Bxe6#
        • 2.Qb3#
      • 1...Se4
        • 2.Bxe6#
        • 2.Qb3#
      • 1...Sd5
        • 2.Qb3#
      • 1...Sxb5!
  • Keys
    • 1.Rc1!
      • 1...Kb3
        • 2.Sxc3#
      • 1...Kd3
        • 2.Rxc3#
      • 1...Kb4
        • 2.Sd6#
      • 1...Kd5
        • 2.Bxe6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(I),XR(c)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(b);N_SPINR(c),P-FLIGHT,XP(D)
    • Try
      • S(E);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);N_SPINR(c),P-FLIGHT,XP(D)
    • Try
      • B(B);XS(a)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
    • Try
      • R(A);CHECK
      • Vars
        • K(b);N_SPINR(c),P-FLIGHT,P_SPINS(a),XR(A)::R(H)+S(E)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
    • Try
      • Q(G);
      • Vars
        • K(b);N_SPINR(c),P_SPINS(a),S_FLIGHT::QAR1(G),XS(a)
        • S(a);N_GUARD,XR(A)::B(I),XR(c)
        • S(a);N_SPINR(c),SBLOCK::QAB1(G)
      • Refutation
        • S(a);XS(E)
  • Actual
    • R(A);P_PINS(a)
    • Vars
      • K(b);N_SPINS(a),S_FLIGHT::R(H)+S(E),XS(a)
      • K(b);N_SPINR(c),N_SPINS(a),S_FLIGHT::R1(A),XS(a)
      • K(b);N_SPINR(c),P-FLIGHT::R(H)+S(E)
      • K(b);N_SPINS(a),S_FLIGHT::B(I),XR(c)
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