MESON Chess Problem Database

Problem Display
PID: 173159 (8/8/8/8/1r1p4/1RQ4p/1RP4k/2K5 w - - 0 1)

Ling, John Francis

Problem Observer, 2005

8/8/8/8/1r1p4/1RQ4p/1RP4k/2K5

#2

5 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Keys
    • 1.Qe1!
      • threat
        • 2.c3#
        • 2.c4#
      • 1...Kg2
        • 2.c4#
      • 1...Rxb3
        • 2.cxb3#
      • 1...Rc4
        • 2.c3#
      • 1...d3
        • 2.cxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Actual
    • Q(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(a);P-FLIGHT::R(B)+P(C)
      • R(c);OGATE,XR(D)::R(B)+P(C),XR(c)
      • R(c);P_PINP(C)::R(B)+P(C)
      • P(d);OGATE::R(B)+P(C),XP(d)
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