MESON Chess Problem Database

Problem Display
PID: 240580 (5BB1/1P6/1Npr4/p7/2NR4/nk6/3P4/R2K4 w - - 0 1)

Cristoffanini, Guido

Shakhmaty i Shashki, 1931

5BB1/1P6/1Npr4/p7/2NR4/nk6/3P4/R2K4

#2

9 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Rxa3#
    • 1...Rd5
      • 2.Rxa3#
    • 1...Re6
      • 2.Rxa3#
      • 2.Rd3#
    • 1...Rf6
      • 2.Rxa3#
      • 2.Rd3#
    • 1...Rg6
      • 2.Rxa3#
      • 2.Rd3#
    • 1...Rh6
      • 2.Rxa3#
      • 2.Rd3#
    • 1...Rd7
      • 2.Rxa3#
    • 1...Rd8
      • 2.Rxa3#
  • Tries
    • 1.Rd3+?
      • 1...Rxd3
        • 2.Rxa3#
      • 1...Kb4!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sxa5#
      • 1...Kxa4
        • 2.Sxd6#
      • 1...Kb4
        • 2.Sxa3#
      • 1...Rxd4
        • 2.Rxa3#
      • 1...Sxc4
        • 2.b8Q#
        • 2.b8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(e);P_PINP(C),XR(E)::R1(A),XS(a)
    • R(e);::R1(A),XS(a)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • R(e);P_PINP(C),XR(E)::R1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT,P_SPINR(e)
  • Actual
    • S(F);
    • Threat
      • B(I)+S(D),DCHECK,XP(c)
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT,XS(F)::R(E)+S(D),XR(e)
      • K(b);P-FLIGHT,P_SPINR(e)::R(E)+S(D),XS(a)
      • R(e);P_PINP(C),XR(E)::R1(A),XS(a)
      • S(a);N_GUARD,P_SPINS(a),XS(D)::P=Q
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