MESON Chess Problem Database

Problem Display
PID: 212383 (2R5/4K3/8/3p1p2/4k3/2P3Q1/8/8 w - - 0 1)

Eyjolfsson, Eyjolfur

The Problemist, 1986

2R5/4K3/8/3p1p2/4k3/2P3Q1/8/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rc4+?
      • 1...d4
        • 2.Rxd4#
      • 1...dxc4!
    • 1.Rc5?
      • 1...d4
        • 2.Re5#
      • 1...f4!
    • 1.Rd8?
      • 1...d4
        • 2.Rxd4#
      • 1...f4!
    • 1.Qf3+?
      • 1...Ke5
        • 2.Qe3#
      • 1...Kxf3!
  • Keys
    • 1.Re8!
      • threat
        • 2.Kd6#
        • 2.Kf6#
        • 2.Kd7#
        • 2.Kf7#
        • 2.Kd8#
        • 2.Kf8#
      • 1...d4
        • 2.Kd6#
      • 1...f4
        • 2.Kf6#

Anticipated by 165106(1981)

This anticipates 103461(1987), 35829(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(b);P_SPINP(b)::R1(D),XP(b)
      • Refutation
        • P(b);XR(D)
    • Try
      • R(D);
      • Vars
        • P(b);OGATE::R1(D)
      • Refutation
        • P(c);
    • Try
      • R(D);
      • Vars
        • P(b);OGATE::R1(D),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
  • Actual
    • R(D);
    • Threat
      • DUALS(6)
    • Vars
      • P(b);::R(D)+K(C)
      • P(c);::R(D)+K(C)
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