MESON Chess Problem Database

Problem Display
PID: 222798 (7N/Q7/2pp4/K1pk1p2/4NB2/4P3/2P5/1B6 w - - 0 1)

Liberali, Giuseppe

Brooklyn Chess Chronicle, 1884

7N/Q7/2pp4/K1pk1p2/4NB2/4P3/2P5/1B6

#2

8 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Ba2#
    • 1...Ke6
      • 2.Qf7#
    • 1...fxe4
      • 2.Qf7#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qf7#
      • 1...Ke6
        • 2.Qf7#
      • 1...c4!
    • 1.Sc3+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
    • 1.Sg5?
      • threat
        • 2.Qf7#
      • 1...c4
        • 2.Qd4#
      • 1...Kc4!
    • 1.Sxd6?
      • threat
        • 2.Qf7#
      • 1...Ke6
        • 2.Qf7#
      • 1...c4!
    • 1.Sf6+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
    • 1.Qd7?
      • 1...Kc4
        • 2.Ba2#
      • 1...fxe4
        • 2.Qf7#
      • 1...c4
        • 2.Qxf5#
      • 1...Kxe4!
    • 1.Qe7?
      • 1...Kc4
        • 2.Ba2#
      • 1...fxe4
        • 2.Qf7#
      • 1...c4!
    • 1.Qg7?
      • 1...Kc4
        • 2.Ba2#
      • 1...Kxe4
        • 2.Qg2#
      • 1...Ke6
        • 2.Qf7#
      • 1...fxe4
        • 2.Qf7#
        • 2.Qg8#
      • 1...c4!
    • 1.c3?
      • threat
        • 2.Qf7#
      • 1...Ke6
        • 2.Qf7#
      • 1...Kc4!
    • 1.c4+?
      • 1...Ke6
        • 2.Qf7#
      • 1...Kxc4!
  • Keys
    • 1.Qh7!
      • 1...Kc4
        • 2.Ba2#
      • 1...Kxe4
        • 2.Qh1#
      • 1...Ke6
        • 2.Qf7#
      • 1...fxe4
        • 2.Qg8#
        • 2.Qf7#
      • 1...c4
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::B(A)
    • K(b);S_FLIGHT::QAB1(G)
    • P(c);SBLOCK,XS(D)::QAB(G)
  • Tries
    • Try
      • S(D);
      • Threat
        • QAB(G)
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • P(a);
    • Try
      • S(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Threat
        • QAB(G)
      • Vars
        • P(a);OGATE::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);XP(e)
      • Threat
        • QAB(G)
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • P(a);
    • Try
      • S(D);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);P_PINP(e)
      • Vars
        • K(b);N_SPINP(e),S_FLIGHT::B(A)
        • P(c);SBLOCK,XS(D)::QAB(G)
        • P(a);SBLOCK::QAR2(G),XP(c)
      • Refutation
        • K(b);N_SPINP(e),S_FLIGHT,XS(D)
    • Try
      • Q(G);
      • Vars
        • K(b);S_FLIGHT::B(A)
        • P(c);SBLOCK,XS(D)::QAB(G)
      • Refutation
        • P(a);
    • Try
      • Q(G);
      • Vars
        • K(b);S_FLIGHT::B(A)
        • K(b);OGATEB,S_FLIGHT,XS(D)::QAB(G)
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • P(a);
    • Try
      • P(B);
      • Threat
        • QAB(G)
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(B);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(G)
      • Refutation
        • K(b);S_FLIGHT,XP(B)
  • Actual
    • Q(G);
    • Vars
      • K(b);S_FLIGHT::B(A)
      • K(b);OGATEB,P_SPINP(c),S_FLIGHT,XS(D)::QAB(G)
      • K(b);S_FLIGHT::QAB1(G)
      • P(a);SBLOCK::QAR2(G),XP(c)
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