MESON Chess Problem Database

Problem Display
PID: 125406 (7k/7P/3p2B1/2b2K2/5Q2/8/8/8 w - - 0 1)

Anonymous

Source?, 0000

7k/7P/3p2B1/2b2K2/5Q2/8/8/8

#2

4 + 3

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ba3
      • 2.Qd4#
    • 1...Bb4
      • 2.Qd4#
    • 1...Bd4
      • 2.Qxd4#
    • 1...d5
      • 2.Qe5#
  • Tries
    • 1.Kg4?
      • threat
        • 2.Qf6#
        • 2.Qf8#
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qf8#
      • 1...d5
        • 2.Qe5#
        • 2.Qf6#
      • 1...Kg7!
    • 1.Kg5?
      • threat
        • 2.Qf6#
        • 2.Qf8#
      • 1...Kg7
        • 2.Qf6#
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qf8#
      • 1...d5
        • 2.Qe5#
        • 2.Qf6#
      • 1...Be3!
    • 1.Ke6?
      • threat
        • 2.Qf6#
        • 2.Qf8#
      • 1...Bd4
        • 2.Qxd4#
        • 2.Qf8#
      • 1...d5
        • 2.Qe5#
        • 2.Qf6#
      • 1...Kg7!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Qf6#
      • 1...Kg7
        • 2.h8Q#
      • 1...Bd4
        • 2.Qxd4#

This anticipates 12333(1976-1977)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • P(b);N_GUARD::QAB(A)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::QAB1(A)
      • Refutation
        • B(a);P_PINQ(A)
    • Try
      • K(B);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(c);OGATE,S_FLIGHT::P=Q
      • B(a);N_GUARD::QAB(A),XB(a)
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