MESON Chess Problem Database

Problem Display
PID: 137598 (8/3Bp2K/8/6kp/5n2/1Q3R2/4p3/8 w - - 0 1)

Ryan, M

The Australasian Chess Review, 1929

8/3Bp2K/8/6kp/5n2/1Q3R2/4p3/8

#2

4 + 5

SOLUTION

  • SOUND
  • Tries
    • 1.Qg8+?
      • 1...Kh4
        • 2.Rxf4#
        • 2.Qg3#
      • 1...Kf6
        • 2.Qg7#
      • 1...Sg6!
    • 1.Qe3?
      • threat
        • 2.Qxf4#
        • 2.Qxe7#
      • 1...Kh4
        • 2.Qxf4#
        • 2.Qxe7#
      • 1...Kf6
        • 2.Qxf4#
      • 1...e6
        • 2.Qxf4#
      • 1...e1Q
        • 2.Qxf4#
      • 1...e1R
        • 2.Qxf4#
      • 1...h4
        • 2.Qe5#
      • 1...e5!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qxf4#
      • 1...Kh4
        • 2.Qxf4#
      • 1...Kf6
        • 2.Qxf4#
      • 1...Se6
        • 2.Qg3#
      • 1...Sg2
        • 2.Qg3#
      • 1...Sd3
        • 2.Qg3#
      • 1...Sh3
        • 2.Qg3#
      • 1...Sd5
        • 2.Qg3#
      • 1...Sg6
        • 2.Qg3#
      • 1...h4
        • 2.Qe5#
      • 1...e5
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);P_SPINS(b),S_FLIGHT::QAB1(A)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);P_PINS(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);S_FLIGHT::QAR2(A),XS(b)
        • P(e);::QAB1(A),XS(b)
        • P(a);::QAB1(A),XS(b)
        • P(d);SBLOCK::QAR2(A)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Threat
      • QAB1(A),XS(b)
    • Vars
      • K(c);S_FLIGHT::QAR2(A),XS(b)
      • K(c);P_SPINS(b),S_FLIGHT::QAR2(A),XS(b)
      • S(b);OGATE::QAR2(A)
      • P(d);SBLOCK::QAR2(A)
      • P(e);OGATEB::QAB(A)
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