MESON Chess Problem Database

Problem Display
PID: 71717 (8/4N3/2p1Nk2/K1Qb2qB/2pP2PB/p7/6p1/4rr2 w - - 0 1)

Cristoffanini, Guido

L'Echiquier, 1925

8/4N3/2p1Nk2/K1Qb2qB/2pP2PB/p7/6p1/4rr2

#2

8 + 9

6479 Problemschach (Sidler) 1968
133 The Problemist Supplement 2007
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe6
      • 2.Qxg5#
  • Tries
    • 1.Sxd5+?
      • 1...Kxe6
        • 2.Qxc6#
      • 1...cxd5!
    • 1.Sf5?
      • threat
        • 2.Qe7#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Rxe6
        • 2.Qf8#
      • 1...Rxf5!
  • Keys
    • 1.Sc8!
      • threat
        • 2.Qe7#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Rxe6
        • 2.Qf8#
      • 1...Bxe6
        • 2.Qxg5#
      • 1...Bf3
        • 2.Qf5#
      • 1...Be4
        • 2.Qe5#

This anticipates 63021(1937)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(f);OGATE,P_PINQ(E),SBLOCK,XS(G)::QAB1(E),XQ(g)
  • Tries
    • Try
      • S(H);CHECK,XB(f)
      • Vars
        • K(i);N_SPINQ(g),P-FLIGHT,XS(G)::QAR2(E),XP(h)
      • Refutation
        • P(h);XS(H)
    • Try
      • S(H);
      • Threat
        • QAB1(E)
      • Vars
        • K(i);N_SPINQ(g),OGATEB,P-FLIGHT,XS(G)::QAR1(E)
        • R(a);SBLOCK,XS(G)::QAR2(E)
      • Refutation
        • R(b);XS(H)
  • Actual
    • S(H);
    • Threat
      • QAB1(E)
    • Vars
      • K(i);N_SPINQ(g),OGATEB,P-FLIGHT,XS(G)::QAR1(E)
      • R(a);SBLOCK,XS(G)::QAR2(E)
      • B(f);OGATE,P_PINQ(E),SBLOCK,XS(G)::QAB1(E),XQ(g)
      • B(f);OGATE,P_PINQ(E)::QAR1(E)
      • B(f);OGATE,P_PINQ(E)::QAB1(E)
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