MESON Chess Problem Database

Problem Display
PID: 181900 (6Q1/3b2pq/7p/2KP1k1N/6NP/3P4/2B5/8 w - - 0 1)

Pereira Machado, AJ

Diario Illustrado, 1905

6Q1/3b2pq/7p/2KP1k1N/6NP/3P4/2B5/8

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ba4
      • 2.Qe6#
    • 1...Bb5
      • 2.Qe6#
    • 1...Bc6
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Be8
      • 2.Qe6#
  • Tries
    • 1.Sf2?
      • threat
        • 2.d4#
      • 1...Ke5
        • 2.d4#
      • 1...Ba4
        • 2.Qe6#
      • 1...Bb5
        • 2.Qe6#
      • 1...Kg6!
    • 1.Sh2?
      • threat
        • 2.d4#
      • 1...Ke5
        • 2.d4#
      • 1...Ba4
        • 2.Qe6#
      • 1...Bb5
        • 2.Qe6#
      • 1...Kg6!
    • 1.Se3+?
      • 1...Ke5
        • 2.Qb8#
        • 2.d4#
      • 1...Kg6!
    • 1.Qxh7+?
      • 1...g6
        • 2.Qxd7#
      • 1...Kxg4!
    • 1.Qxg7?
      • threat
        • 2.Se3#
        • 2.d4#
      • 1...Qg6
        • 2.Se3#
      • 1...Ba4
        • 2.Se3#
      • 1...Bb5
        • 2.Se3#
      • 1...Qxg7!
    • 1.Qf8+?
      • 1...Kg6
        • 2.Sf4#
      • 1...Kxg4!
  • Keys
    • 1.Se5!
      • threat
        • 2.d4#
      • 1...Kxe5
        • 2.d4#
      • 1...Ba4
        • 2.Qe6#
      • 1...Bb5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(c);N_GUARD::QAB1(H)
    • B(c);N_GUARD::QAB1(H),XB(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • B(A)+P(B)
      • Vars
        • K(a);P-FLIGHT::P(B)
        • B(c);N_GUARD::QAB1(H)
      • Refutation
        • K(a);P_SPINP(d),S_FLIGHT
    • Try
      • S(C);
      • Threat
        • B(A)+P(B)
      • Vars
        • K(a);P-FLIGHT::P(B)
        • B(c);N_GUARD::QAB1(H)
      • Refutation
        • K(a);P_SPINP(d),S_FLIGHT
    • Try
      • S(C);CHECK
      • Refutation
        • K(a);P_SPINP(d),S_FLIGHT
    • Try
      • Q(H);CHECK,XQ(e)
      • Vars
        • P(d);OGATE,P_SPINP(d),SBLOCK::QAB(H),XB(c)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
    • Try
      • Q(H);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(e);::S(C)
        • B(c);::S(C)
      • Refutation
        • Q(e);XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • K(a);S_FLIGHT::S(G)
      • Refutation
        • K(a);S_FLIGHT,XS(C)
  • Actual
    • S(C);
    • Threat
      • B(A)+P(B)
    • Vars
      • K(a);P-FLIGHT,XS(C)::P(B)
      • B(c);N_GUARD::QAB1(H)
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