MESON Chess Problem Database

Problem Display
PID: 166878 (2n2K2/B1Q5/2Rp4/R1nk2P1/8/8/N7/1B6 w - - 0 1)

Cristoffanini, Guido

L'Alfiere di Re, 1925

2n2K2/B1Q5/2Rp4/R1nk2P1/8/8/N7/1B6

#2

8 + 4

15148 Sadier Collection 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Rcxc5+?
      • 1...Kd4
        • 2.Rc4#
        • 2.Rd5#
      • 1...Ke6
        • 2.Bf5#
        • 2.Qf7#
        • 2.Qxc8#
      • 1...dxc5!
    • 1.Qxd6+?
      • 1...Kc4
        • 2.Qd3#
      • 1...Sxd6!
  • Keys
    • 1.Qh7!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Qd3#
      • 1...Kd4
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
      • 1...Kxc6
        • 2.Sb4#
      • 1...Ke6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(E);CHECK,XS(a)
      • Refutation
        • P(c);P_SPINP(c),XR(E)
    • Try
      • Q(G);CHECK,XP(c)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(G)
      • Refutation
        • S(d);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • K(b);S_FLIGHT::QAB1(G)
      • K(b);P-FLIGHT::QAR1(G)
      • K(b);N_SPINS(a),S_FLIGHT,XR(E)::S(B)
      • K(b);N_SPINS(a),P_SPINP(c),S_FLIGHT::QAB1(G)
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