MESON Chess Problem Database

Problem Display
PID: 267412 (rn6/p1Pk4/p1p1b2R/4R3/1Q3K2/8/8/8 w - - 0 1)

Cristoffanini, Guido

El Diluvio, 1933

rn6/p1Pk4/p1p1b2R/4R3/1Q3K2/8/8/8

#2

5 + 7

SOLUTION

  • SOUND
  • Tries
    • 1.Qf8?
      • threat
        • 2.Qd8#
        • 2.c8Q#
      • 1...c5
        • 2.c8Q#
      • 1...Kxc7!
    • 1.cxb8Q?
      • threat
        • 2.Q4d6#
        • 2.Q4b7#
      • 1...c5
        • 2.Q4b7#
      • 1...Rxb8!
  • Keys
    • 1.Qb7!
      • threat
        • 2.cxb8Q#
      • 1...Kd6
        • 2.c8S#
      • 1...Ke7
        • 2.cxb8Q#
      • 1...Ke8
        • 2.c8Q#
        • 2.c8R#
      • 1...Ba2
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bb3
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bh3
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bc4
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bg4
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bd5
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bf5
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bf7
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#
      • 1...Bg8
        • 2.cxb8Q#
        • 2.cxb8R#
        • 2.c8Q#
        • 2.c8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::P=Q
      • Refutation
        • K(e);P-FLIGHT,XP(E)
    • Try
      • P(E);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • P(b);::QAR2(A)
      • Refutation
        • R(f);XQ(E)
  • Actual
    • Q(A);
    • Threat
      • PXS(g)=Q
    • Vars
      • K(e);N_GUARD,P-FLIGHT,P_SPINB(c)::P=S
      • K(e);P-FLIGHT,P_SPINB(c)::PXS(g)=Q
      • K(e);N_GUARD,P_SPINB(c),S_FLIGHT::P=Q
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