MESON Chess Problem Database

Problem Display
PID: 51180 (8/8/4K2p/2p3pP/2p1kp1P/2P1p1P1/2P5/5Q2 w - - 0 1)

Stewart, John

Manchester Guardian, 1953

8/8/4K2p/2p3pP/2p1kp1P/2P1p1P1/2P5/5Q2

#2

7 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qxe2#
    • 1...fxg3
      • 2.Qf5#
    • 1...f3
      • 2.Qxc4#
    • 1...gxh4
      • 2.Qxf4#
    • 1...g4
      • 2.Qxf4#
  • Tries
    • 1.g4?
      • 1...e2
        • 2.Qxe2#
      • 1...f3
        • 2.Qxc4#
      • 1...gxh4!
    • 1.hxg5?
      • threat
        • 2.Qxf4#
      • 1...fxg3
        • 2.Qf5#
      • 1...f3
        • 2.Qxc4#
      • 1...hxg5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qd5#
      • 1...fxg3
        • 2.Qg4#
      • 1...e2
        • 2.Qxe2#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • P(a);OGATEB::QAR2(A),XP(a)
    • P(d);OGATE,XP(D)::QAB1(A)
    • P(d);SBLOCK::QAR2(A),XP(b)
    • P(f);N_GUARD,XP(E)::QAR1(A),XP(d)
    • P(f);N_GUARD::QAR1(A),XP(d)
  • Tries
    • Try
      • P(D);
      • Vars
        • P(a);OGATEB::QAR2(A),XP(a)
        • P(d);SBLOCK::QAR2(A),XP(b)
      • Refutation
        • P(f);XP(E)
    • Try
      • P(E);XP(f)
      • Threat
        • QAR1(A),XP(d)
      • Vars
        • P(d);OGATE,XP(D)::QAB1(A)
        • P(d);SBLOCK::QAR2(A),XP(b)
      • Refutation
        • P(g);XP(E)
  • Actual
    • Q(A);
    • Threat
      • QAB1(A)
    • Vars
      • P(d);OGATEB,XP(D)::QAR2(A)
      • P(a);OGATEB::QAR2(A),XP(a)
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Developed and maintained by Brian Stephenson.
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