MESON Chess Problem Database

Problem Display
PID: 250593 (4K3/4B3/4k3/4p3/1p2Q2p/4n3/3P1P2/4q3 w - - 0 1)

Dawson, Thomas Rayner

Manchester Evening News, 1926

(First published on Sat May 22 1926)

4K3/4B3/4k3/4p3/1p2Q2p/4n3/3P1P2/4q3

#2

5 + 6

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Qg4#
    • 1...Sf5
      • 2.Qc4#
  • Tries
    • 1.Qd3?
      • threat
        • 2.Qd7#
      • 1...e4
        • 2.Qxe4#
      • 1...Sd5
        • 2.Qh3#
      • 1...Qxd2!
    • 1.Qf3?
      • threat
        • 2.Qf7#
      • 1...e4
        • 2.Qxe4#
      • 1...Sf5
        • 2.Qb3#
      • 1...Qxf2!
    • 1.f4?
      • threat
        • 2.Qxe5#
      • 1...Sd1
        • 2.f5#
      • 1...Sf1
        • 2.f5#
      • 1...Sc2
        • 2.f5#
      • 1...Sg2
        • 2.f5#
      • 1...Sc4
        • 2.f5#
      • 1...Sg4
        • 2.f5#
      • 1...Sd5
        • 2.f5#
      • 1...Sf5
        • 2.Qc4#
      • 1...Qa1!
  • Keys
    • 1.d4!
      • threat
        • 2.Qxe5#
      • 1...Sd1
        • 2.d5#
      • 1...Sf1
        • 2.d5#
      • 1...Sc2
        • 2.d5#
      • 1...Sg2
        • 2.d5#
      • 1...Sc4
        • 2.d5#
      • 1...Sg4
        • 2.d5#
      • 1...Sd5
        • 2.Qg4#
      • 1...Sf5
        • 2.d5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,SBLOCK::QAB(C)
  • Tries
    • Try
      • Q(C);N_PINP(e)
      • Threat
        • QAB1(C)
      • Vars
        • P(e);OGATEB::QAR2(C),XP(e)
        • S(b);OGATE,SBLOCK::QAB(C)
      • Refutation
        • Q(a);XP(A)
    • Try
      • Q(C);N_PINP(e)
      • Threat
        • QAB1(C)
      • Vars
        • P(e);OGATEB::QAR2(C),XP(e)
        • S(b);OGATE,SBLOCK::QAB(C)
      • Refutation
        • Q(a);XP(B)
    • Try
      • P(B);
      • Threat
        • QAR1(C),XP(e)
      • Vars
        • S(b);N_GUARD::P(B)
        • S(b);N_GUARD,SBLOCK::QAB(C)
      • Refutation
        • Q(a);
  • Actual
    • P(A);
    • Threat
      • QAR1(C),XP(e)
    • Vars
      • S(b);N_GUARD::P(A)
      • S(b);N_GUARD,SBLOCK::QAB(C)
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