MESON Chess Problem Database

Problem Display
PID: 203846 (5K2/3p1Q1B/2p2R2/3N4/1p1k2p1/1P1N1bp1/2P1nqp1/6B1 w - - 0 1)

Cristoffanini, Guido

64 Shakhmatnoe obozrenie, 1928

5K2/3p1Q1B/2p2R2/3N4/1p1k2p1/1P1N1bp1/2P1nqp1/6B1

#2

9 + 10

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qe3
      • 2.Bxe3#
  • Tries
    • 1.Rf4+?
      • 1...Be4
        • 2.Rxe4#
      • 1...Sxf4!
    • 1.Qe8?
      • threat
        • 2.Qe5#
      • 1...Kxd5
        • 2.Qxd7#
        • 2.Qe5#
      • 1...d6!
    • 1.Qe7?
      • threat
        • 2.Qc5#
        • 2.Qe5#
      • 1...Kxd5
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qe5#
        • 2.Qxd7#
      • 1...c5
        • 2.Qxc5#
        • 2.Qe5#
      • 1...d6!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rd6#
      • 1...Kxd5
        • 2.Qxd7#
      • 1...Bxd5
        • 2.Rf3#
      • 1...cxd5
        • 2.Rxf3#
        • 2.Re6#
      • 1...d6
        • 2.Rxd6#
      • 1...Be4
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(b);OGATE::B(A),XQ(b)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • B(d);N_GUARD,P_SPINB(d)::R1(F),XB(d)
      • Refutation
        • S(a);XR(F)
    • Try
      • Q(G);
      • Threat
        • QAB1(G)
      • Refutation
        • P(j);
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Refutation
        • P(j);
  • Actual
    • Q(G);
    • Threat
      • QAB(G)+R(F)
    • Vars
      • K(g);N_SPINQ(b),OGATEB,P-FLIGHT,XS(E)::QAR2(G),XP(j)
      • B(d);P_PINR(F),SBLOCK,XS(E)::QAB(G)+R(F)
      • P(j);::QAB(G)+R(F),XP(j)
      • B(d);P_PINR(F),SBLOCK::QAB(G)+R(F)
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