MESON Chess Problem Database

Problem Display
PID: 24242 (3n4/5p2/7K/5k2/4Rp2/8/4Q3/8 w - - 0 1)

Lincoln, Robert A

Die Schwalbe, 1996

3n4/5p2/7K/5k2/4Rp2/8/4Q3/8

#2

3 + 4

2786 More Fun with Chess Miniatures 2000
56 The Problemist 2006

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Rxf4#
    • 1...f3
      • 2.Qxf3#
  • Tries
    • 1.Qf3?
      • threat
        • 2.Qxf4#
      • 1...Kf6
        • 2.Qxf4#
      • 1...Se6!
    • 1.Qh5+?
      • 1...Kf6
        • 2.Qe5#
        • 2.Qg5#
      • 1...Kxe4!
  • Keys
    • 1.Re7!
      • 1...Kf6
        • 2.Qe5#
      • 1...f3
        • 2.Qxf3#
      • 1...Sc6
        • 2.Rxf7#
      • 1...Se6
        • 2.Rxf7#
      • 1...Sb7
        • 2.Rxf7#
      • 1...f6
        • 2.Qh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::R(B),XP(a)
    • P(a);OGATEB::QAR2(A),XP(a)
  • Tries
    • Try
      • Q(A);P_PINP(a)
      • Threat
        • QAR1(A),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR2(A),XP(a)
      • Refutation
        • S(d);
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • R(B);
    • Vars
      • K(b);P-FLIGHT::QAB1(A)
      • P(a);OGATEB::QAR2(A),XP(a)
      • S(d);N_GUARD::R(B),XP(c)
      • P(c);SBLOCK::QAR2(A)
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