MESON Chess Problem Database

Problem Display
PID: 24814 (8/8/5KB1/8/2P2k2/4p2p/4Q1pr/3N4 w - - 0 1)

Shanahan, Ian

4th HM., The Problemist Supplement, 2001

8/8/5KB1/8/2P2k2/4p2p/4Q1pr/3N4

#2

5 + 5

56 The Problemist 2003

SOLUTION

  • SOUND
  • Tries
    • 1.Bf5?
      • threat
        • 2.Qg4#
        • 2.Qxe3#
      • 1...Kg3
        • 2.Qg4#
      • 1...g1B
        • 2.Qg4#
      • 1...g1R
        • 2.Qxe3#
      • 1...g1Q!
    • 1.Qf2+?
      • 1...Kg4
        • 2.Sxe3#
      • 1...exf2!
  • Keys
    • 1.Bh5!
      • threat
        • 2.Qf3#
        • 2.Qg4#
        • 2.Qxe3#
      • 1...Kg3
        • 2.Qg4#
      • 1...Ke4
        • 2.Qxe3#
      • 1...g1Q
        • 2.Qf3#
      • 1...g1S
        • 2.Qg4#
        • 2.Qxe3#
      • 1...g1B
        • 2.Qf3#
        • 2.Qg4#
      • 1...g1R
        • 2.Qf3#
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(E);
      • Threat
        • DUALS(2)
      • Vars
        • K(e);S_FLIGHT::QAR1(B)
        • P(a);::QAR1(B)
        • P(a);::QAB1(B),XP(c)
      • Refutation
        • P(a);
    • Try
      • Q(B);CHECK
      • Vars
        • K(e);P-FLIGHT::S(A),XP(c)
      • Refutation
        • P(c);XQ(B)
  • Actual
    • B(E);
    • Threat
      • DUALS(3)
    • Vars
      • K(e);S_FLIGHT::QAR1(B)
      • K(e);P-FLIGHT,P_SPINP(c)::QAR1(B),XP(c)
      • P(a);::QAR1(B)
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