MESON Chess Problem Database

Problem Display
PID: 77325 (4K3/5B2/1Q1p4/4k3/3p2P1/8/2P3P1/2B5 w - - 0 1)

Davey, David Murray

The Tablet, 1950

(First published on Sat Apr 29 1950)

4K3/5B2/1Q1p4/4k3/3p2P1/8/2P3P1/2B5

#2

7 + 3

15239 Valois Notebooks 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Qxd4#
    • 1...d5
      • 2.Qe6#
  • Tries
    • 1.Ke7?
      • 1...d3
        • 2.Qe3#
      • 1...d5
        • 2.Qe6#
      • 1...Ke4!
    • 1.Be3?
      • threat
        • 2.Qxd4#
      • 1...Ke4
        • 2.Qxd4#
      • 1...Kf6
        • 2.Qxd4#
      • 1...d3
        • 2.Qd4#
      • 1...d5
        • 2.Qe6#
      • 1...dxe3!
    • 1.Bg5?
      • 1...d3
        • 2.Qe3#
      • 1...d5
        • 2.Qe6#
      • 1...Ke4!
    • 1.Qa5+?
      • 1...Ke4
        • 2.Bg6#
        • 2.Qe1#
        • 2.Qd5#
        • 2.Qf5#
      • 1...Kf6
        • 2.Qg5#
      • 1...d5!
    • 1.Qc5+?
      • 1...Ke4
        • 2.Bg6#
        • 2.Qd5#
        • 2.Qf5#
      • 1...Kf6
        • 2.Qxd4#
        • 2.Qg5#
      • 1...d5
        • 2.Qe7#
      • 1...dxc5!
    • 1.Qa7?
      • threat
        • 2.Qe7#
      • 1...Ke4
        • 2.Qe7#
      • 1...Kf6
        • 2.Qxd4#
      • 1...d3!
    • 1.Qd8?
      • threat
        • 2.Qe7#
      • 1...Ke4
        • 2.Qe7#
      • 1...d3!
    • 1.Qb5+?
      • 1...Ke4
        • 2.Bg6#
        • 2.Qe2#
        • 2.Qd5#
        • 2.Qf5#
      • 1...Kf6
        • 2.Qg5#
      • 1...d5!
    • 1.Qxd6+?
      • 1...Ke4
        • 2.Bd5#
        • 2.Bg6#
        • 2.Qf4#
        • 2.Qe7#
        • 2.Qd5#
        • 2.Qe6#
      • 1...Kxd6!
    • 1.c3?
      • threat
        • 2.Qxd4#
      • 1...Ke4
        • 2.Qxd4#
      • 1...Kf6
        • 2.Qxd4#
      • 1...d3
        • 2.Qd4#
      • 1...d5
        • 2.Qe6#
      • 1...dxc3!
  • Keys
    • 1.Qb4!
      • 1...Ke4
        • 2.Qe1#
      • 1...Kf6
        • 2.Qxd4#
      • 1...d3
        • 2.Bb2#
        • 2.Qf4#
      • 1...d5
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINP(c),S_FLIGHT::QAB(E),XP(a)
    • P(c);OGATE::QAR1(E)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • P(a);OGATE::QAR2(E)
        • P(c);OGATE::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(A);
      • Threat
        • QAB1(E),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(E),XP(a)
        • K(b);P_SPINP(c),S_FLIGHT::QAB(E),XP(a)
        • P(a);::QAB1(E)
        • P(c);OGATE::QAR1(E)
      • Refutation
        • P(a);XB(A)
    • Try
      • B(A);
      • Vars
        • P(a);OGATE::QAR2(E)
        • P(c);OGATE::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(E);CHECK
      • Vars
        • P(c);OGATE,P_SPINP(c)::QAR2(E)
      • Refutation
        • P(c);XQ(E)
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • K(b);P-FLIGHT::QAR(E)
        • K(b);S_FLIGHT::QAB(E),XP(a)
      • Refutation
        • P(a);
    • Try
      • Q(E);
      • Threat
        • QAR2(E)
      • Vars
        • K(b);P-FLIGHT::QAR(E)
      • Refutation
        • P(a);
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAB1(E)
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(E);CHECK,XP(c)
      • Refutation
        • K(b);S_FLIGHT,XQ(E)
    • Try
      • P(B);
      • Threat
        • QAB1(E),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(E),XP(a)
        • K(b);P_SPINP(c),S_FLIGHT::QAB(E),XP(a)
        • P(a);::QAB1(E)
        • P(c);OGATE::QAR1(E)
      • Refutation
        • P(a);XP(B)
  • Actual
    • Q(E);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(a)::QAR(E)
      • K(b);S_FLIGHT::QAB(E),XP(a)
      • P(c);OGATE::QAR2(E)
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