MESON Chess Problem Database

Problem Display
PID: 167275 (7Q/8/r7/4NkN1/p2P4/5P2/K1Rb2r1/1B6 w - - 0 1)

Cristoffanini, Guido

Grantham Journal, 1927

(First published on Sat Mar 5 1927)

7Q/8/r7/4NkN1/p2P4/5P2/K1Rb2r1/1B6

#2

8 + 5

14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bf4
      • 2.Rxg2#
  • Tries
    • 1.Rc5+?
      • 1...Kxg5
        • 2.Sg6#
      • 1...Kf4!
    • 1.Rc6+?
      • 1...Kxg5
        • 2.Qh6#
      • 1...Kf4!
  • Keys
    • 1.Sg6!
      • threat
        • 2.Rc5#
      • 1...Kxg5
        • 2.Rc5#
      • 1...Kxg6
        • 2.Rc5#
      • 1...Rxg5
        • 2.Rc6#
      • 1...Rxg6
        • 2.Qe5#
      • 1...Bxg5
        • 2.Re2#
      • 1...Bc1
        • 2.Rxg2#
      • 1...Be1
        • 2.Rxg2#
      • 1...Bc3
        • 2.Rxg2#
      • 1...Be3
        • 2.Rxg2#
      • 1...Bb4
        • 2.Rxg2#
      • 1...Bf4
        • 2.Rxg2#
      • 1...Ba5
        • 2.Rxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATE,P_PINR(C),SBLOCK::B(A)+R(C),XR(b)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(G)::R(C)+S(F)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XS(G)::QAB1(H)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(F);
    • Threat
      • B(A)+R(C),DCHECK
    • Vars
      • K(d);P-FLIGHT,XS(G)::R(C)
      • K(d);S_FLIGHT,XS(F)::B(A)+R(C)
      • R(b);SBLOCK,XS(G)::B(A)+R(C)
      • R(e);SBLOCK,XS(F)::QAR1(H)
      • B(a);OGATE,P_PINR(C),SBLOCK,XS(G)::B(A)+R(C)
      • B(a);OGATE,P_PINR(C)::B(A)+R(C),XR(b)
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