MESON Chess Problem Database

Problem Display
PID: 205645 (8/3K4/8/3k1p2/P7/4pNP1/2P5/7Q w - - 0 1)

Haycraft, GHP

Land and Water, 1872

(First published on Sat Aug 24 1872)

8/3K4/8/3k1p2/P7/4pNP1/2P5/7Q

#2

6 + 3

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qa1?
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke4!
    • 1.Qd1+?
      • 1...Kc4
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke4!
    • 1.Qh4?
      • threat
        • 2.Qd4#
      • 1...Kc5
        • 2.Qd4#
      • 1...f4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qd4#
      • 1...Kc4
        • 2.Qd4#
      • 1...Ke4
        • 2.Qa8#
      • 1...Kc5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(c);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);S_FLIGHT::QAB(A)
      • K(b);P-FLIGHT::QAB1(A)
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