MESON Chess Problem Database

Problem Display
PID: 201434 (8/1K3B1b/4p3/Q7/4k2P/4P1p1/4PP2/8 w - - 0 1)

Invrea, David Edoardo

L'Italia Scacchistica, 1922

8/1K3B1b/4p3/Q7/4k2P/4P1p1/4PP2/8

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Bxg6#
    • 1...Bg8
      • 2.Bg6#
  • Tries
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Ke5!
    • 1.Qa2?
      • threat
        • 2.Qxe6#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kf5
        • 2.Qxe6#
      • 1...e5
        • 2.Qb1#
        • 2.Qc2#
      • 1...Bf5!
    • 1.Qa4+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf5
        • 2.Qf4#
      • 1...Ke5!
    • 1.Qc5?
      • threat
        • 2.f3#
      • 1...e5
        • 2.Qc2#
      • 1...gxf2!
    • 1.f4?
      • threat
        • 2.Qe5#
      • 1...e5
        • 2.Qxe5#
      • 1...Kxe3!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Qxe6#
      • 1...Kd5
        • 2.Qd4#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kf5
        • 2.Qxe6#
      • 1...Bf5
        • 2.Qd4#
      • 1...e5
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • B(d);N_GUARD::B(G),XB(d)
    • B(d);N_GUARD::B(G)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(E)
        • K(b);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAR2(E),XP(c)
      • Vars
        • K(b);P-FLIGHT::QAR1(E),XP(c)
        • K(b);S_FLIGHT::QAB1(E),XP(c)
      • Refutation
        • B(d);
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(E)
        • K(b);OGATE,S_FLIGHT::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • P(B)
      • Vars
        • P(c);SBLOCK::QAB(E)
      • Refutation
        • P(a);XP(B)
    • Try
      • P(B);
      • Threat
        • QAR1(E)
      • Vars
        • P(c);::QAR1(E),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • Q(E);
    • Threat
      • QAR2(E),XP(c)
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT::QAR1(E)
      • K(b);P-FLIGHT::QAR1(E),XP(c)
      • K(b);S_FLIGHT::QAB1(E),XP(c)
      • B(d);SBLOCK::QAR1(E)
      • P(c);SBLOCK::QAB(E)
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