MESON Chess Problem Database

Problem Display
PID: 23144 (8/8/8/2Q5/3pkp2/3R4/2PK4/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/2Q5/3pkp2/3R4/2PK4/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...f3
      • 2.Rxd4#
  • Tries
    • 1.Rg3?
      • 1...f3
        • 2.Rg4#
      • 1...d3
        • 2.cxd3#
      • 1...fxg3!
    • 1.c3?
      • 1...f3
        • 2.Rxd4#
      • 1...dxc3+!
    • 1.c4?
      • threat
        • 2.Qd5#
      • 1...f3
        • 2.Rxd4#
      • 1...dxc4 ep+!
  • Keys
    • 1.Rh3!
      • 1...f3
        • 2.Rh4#
      • 1...d3
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R1(C),XP(a)
  • Tries
    • Try
      • R(C);
      • Vars
        • P(c);OGATEB,SBLOCK::R(C)
        • P(a);OGATE::P(A),XP(a)
      • Refutation
        • P(c);XR(C)
    • Try
      • P(A);
      • Vars
        • P(c);SBLOCK::R1(C),XP(a)
      • Refutation
        • P(a);CHECK,XP(A)
    • Try
      • P(A);
      • Threat
        • QAB1(D)
      • Vars
        • P(c);SBLOCK::R1(C),XP(a)
      • Refutation
        • P(a);CHECK,EP,XP(A)
  • Actual
    • R(C);
    • Vars
      • P(c);OGATEB,SBLOCK::R(C)
      • P(a);OGATE::P(A),XP(a)
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