MESON Chess Problem Database

Problem Display
PID: 206251 (r4N2/rP3PP1/pKPk2P1/P1N1Rp2/5P2/8/8/8 w - - 0 1)

Colonelli, Hercules

Il Problema, 1959

r4N2/rP3PP1/pKPk2P1/P1N1Rp2/5P2/8/8/8

#2

11 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb7+
      • 2.Sxb7#
    • 1...Rc8
      • 2.bxc8S#
    • 1...Re8
      • 2.fxe8S#
    • 1...Rxf8
      • 2.gxf8Q#
      • 2.gxf8B#
  • Tries
    • 1.b8Q+?
      • 1...Rc7
        • 2.Sb7#
        • 2.Qxc7#
      • 1...Rxb8+!
    • 1.b8B+?
      • 1...Rc7
        • 2.Sb7#
        • 2.Bxc7#
      • 1...Rxb8+!
  • Keys
    • 1.c7!
      • 1...Rxb7+
        • 2.Sxb7#
      • 1...Rxf8
        • 2.gxf8Q#
        • 2.gxf8B#
      • 1...Rb8
        • 2.cxb8Q#
        • 2.cxb8B#
      • 1...Rc8
        • 2.bxc8S#
      • 1...Rd8
        • 2.cxd8Q#
        • 2.cxd8R#
      • 1...Re8
        • 2.fxe8S#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(d);CHECK,XP(H)::S(C),XR(d)
    • R(e);OGATE::PXR(e)=S
    • R(e);OGATE,XS(K)::PXR(e)=Q
  • Tries
    • Try
      • P(H);CHECK
      • Refutation
        • R(e);CHECK,XQ(H)
    • Try
      • P(H);CHECK
      • Refutation
        • R(e);CHECK,XB(H)
  • Actual
    • P(F);
    • Vars
      • R(d);CHECK,XP(H)::S(C),XR(d)
      • R(e);OGATE,XS(K)::PXR(e)=Q
      • R(e);OGATE,P_PINP(H)::PXR(e)=Q
      • R(e);OGATE::PXR(e)=S
      • R(e);OGATE::PXR(e)=Q
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