MESON Chess Problem Database

Problem Display
PID: 207455 (6R1/Kb1p2qp/2PN1k1p/Q7/3N1p1p/7P/P5P1/BB6 w - - 0 1)

Cristoffanini, Guido

Il Problema, 1931

6R1/Kb1p2qp/2PN1k1p/Q7/3N1p1p/7P/P5P1/BB6

#2

11 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Qf5#
  • Tries
    • 1.S4b5+?
      • 1...Kg5
        • 2.Sa3#
        • 2.Sc7#
      • 1...Ke7
        • 2.Re8#
      • 1...Ke6!
    • 1.S4f5+?
      • 1...Kg5
        • 2.Se3#
        • 2.Sg3#
        • 2.Se7#
        • 2.Sxg7#
      • 1...Kg6
        • 2.Se3#
        • 2.Sg3#
        • 2.Sxh4#
        • 2.Se7#
        • 2.Sxg7#
      • 1...Ke6!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Sf3#
      • 1...Kg5
        • 2.Qe5#
      • 1...Qxg2
        • 2.Sc2#
      • 1...Qg5
        • 2.S4f5#
      • 1...Qe7
        • 2.Se6#
      • 1...f3
        • 2.Sxf3#

This is a version

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(g);SBLOCK::QAR1(G)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(K)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(G);
    • Threat
      • B(A)+S(F)
    • Vars
      • K(c);P_SPINQ(g),S_FLIGHT::QAR2(G)
      • Q(g);XP(D)::B(A)+S(F)
      • Q(g);::B(A)+S(F)
      • Q(g);SBLOCK::B(A)+S(F)
      • P(a);::B(A)+S(F),XP(a)
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