MESON Chess Problem Database

Problem Display
PID: 184801 (kbr5/8/K1R5/8/8/8/8/2Q5 w - - 0 1)

Doyle, James Bernard Harvey

Hobbies, 1908

kbr5/8/K1R5/8/8/8/8/2Q5

#2

3 + 3

5454 Near Snap 2018
3713 Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc6+
      • 2.Qxc6#
  • Keys
    • 1.Qh1!
      • threat
        • 2.Rc7#
        • 2.Rxc8#
      • 1...Rxc6+
        • 2.Qxc6#
      • 1...Bh2
        • 2.Rxc8#
      • 1...Bg3
        • 2.Rxc8#
      • 1...Bf4
        • 2.Rxc8#
      • 1...Be5
        • 2.Rxc8#
      • 1...Bd6
        • 2.Rxc8#
      • 1...Ba7
        • 2.Rxc8#
      • 1...Bc7
        • 2.Rb6#
      • 1...Rc7
        • 2.Rxc7#
      • 1...Rd8
        • 2.Rd6#
      • 1...Re8
        • 2.Re6#
      • 1...Rf8
        • 2.Rf6#
      • 1...Rg8
        • 2.Rg6#
      • 1...Rh8
        • 2.Rh6#

This anticipates 195059(1918), 178096(1965), 157484(1965), 172205(1983)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,OGATE,XR(C)::QAB(A),XR(c)
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • R(c);CHECK,OGATE,P_SPINR(c),XR(C)::QAB(A),XR(c)
      • B(b);::QAB(A)+R(C),DCHECK,XR(c)
      • B(b);S_CUTR(c)::QAB(A)+R(C)
      • R(c);::QAB(A)+R(C),XR(c)
      • R(c);N_GUARD::QAB(A)+R(C)
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