MESON Chess Problem Database

Problem Display
PID: 63321 (7r/R2Pp3/pp1k2N1/b2P1Pp1/1P3r2/2N5/7B/R3K2B w Q - 0 1)

Colonelli, Hercules

3rd Prize, O Globo TT, 1966

7r/R2Pp3/pp1k2N1/b2P1Pp1/1P3r2/2N5/7B/R3K2B

#2

11 + 8

23 Die Schwalbe 2005
15422 Problemskak 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rxh2
      • 2.d8Q#
      • 2.d8R#
    • 1...Rh3
      • 2.d8Q#
      • 2.d8R#
    • 1...Rh4
      • 2.d8Q#
      • 2.d8R#
    • 1...Rh5
      • 2.d8Q#
      • 2.d8R#
    • 1...Rh6
      • 2.d8Q#
      • 2.d8R#
    • 1...Rh7
      • 2.d8Q#
      • 2.d8R#
    • 1...Rc8
      • 2.dxc8S#
    • 1...Re8
      • 2.dxe8S#
  • Tries
    • 1.Bxf4+?
      • 1...e5
        • 2.Bxe5#
      • 1...gxf4!
    • 1.Rd1?
      • threat
        • 2.Se4#
      • 1...Rxh2
        • 2.d8Q#
        • 2.d8R#
      • 1...e5
        • 2.dxe5 ep#
      • 1...Bxb4!
  • Keys
    • 1.0-0-0!
      • threat
        • 2.Se4#
      • 1...Rxh2
        • 2.d8Q#
        • 2.d8R#
      • 1...Rc8
        • 2.dxc8S#
      • 1...e5
        • 2.dxe5 ep#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(h);N_GUARD,N_SPINR(a),XB(D)::P=Q
    • R(h);N_GUARD::P=Q
    • R(h);OGATE::PXR(h)=S
  • Tries
    • Try
      • B(D);CHECK,XR(a)
      • Vars
        • P(g);P_SPINP(g)::B(D),XP(g)
      • Refutation
        • P(c);XB(D)
    • Try
      • R(A);
      • Threat
        • S(E)
      • Vars
        • R(h);N_GUARD,N_SPINR(a),XB(D)::P=Q
        • P(g);N_SPINR(a),OGATE::R(A)+P(G),XP(g),EP
      • Refutation
        • B(b);P_PINS(E),XP(F)
  • Actual
    • K(B);0-0-0
    • Threat
      • S(E)
    • Vars
      • R(h);N_GUARD,N_SPINR(a),XB(D)::P=Q
      • R(h);OGATE,P_PINS(E)::PXR(h)=S
      • P(g);N_SPINR(a),OGATE::R(A)+P(G),XP(g),EP
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