MESON Chess Problem Database

Problem Display
PID: 273593 (Rb2n1Rr/1Pk5/2P1B3/2Q2N2/p2r3p/8/4n2K/6B1 w - - 0 1)

Sydenham, Colin Peter

diagrammes, 1978

Rb2n1Rr/1Pk5/2P1B3/2Q2N2/p2r3p/8/4n2K/6B1

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd8+
      • 2.c7#
    • 1...Rd1
      • 2.Qb6#
    • 1...Rd2
      • 2.Qb6#
    • 1...Rd3
      • 2.Qb6#
    • 1...Rc4
      • 2.Qb6#
    • 1...Re4
      • 2.Qb6#
    • 1...Rf4
      • 2.Qb6#
    • 1...Rg4
      • 2.Qb6#
    • 1...Rd5
      • 2.Qb6#
    • 1...Rd6
      • 2.Qb6#
    • 1...Rd7
      • 2.Qb6#
    • 1...Rd8
      • 2.Qb6#
    • 1...Ba7
      • 2.Rc8#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Qb6#
      • 1...Kd8+
        • 2.Qd6#
        • 2.c7#
      • 1...Ba7
        • 2.Rc8#
      • 1...Sxd4!
    • 1.Rg7+?
      • 1...Kd8+
        • 2.Rxb8#
      • 1...Rd7
        • 2.Rxd7#
        • 2.Qb6#
      • 1...Sxg7!
  • Keys
    • 1.Bd5!
      • threat
        • 2.Qa5#
      • 1...Kd8+
        • 2.Qd6#
      • 1...Rxd5
        • 2.Qb6#
      • 1...Rb4
        • 2.Qe7#
      • 1...Ba7
        • 2.Rc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • K(e);CHECK,OGATE,P_SPINB(f),P_SPINS(g),S_FLIGHT::P(E)
    • R(c);::QAB1(C)
    • R(c);SBLOCK::QAB1(C)
    • B(f);OGATE::R1(H)
  • Tries
    • Try
      • B(A);XR(c)
      • Threat
        • QAB1(C)
      • Vars
        • B(f);OGATE::R1(H)
      • Refutation
        • S(a);XB(A)
    • Try
      • R(I);CHECK
      • Vars
        • K(e);CHECK,N_GUARD,P_SPINB(f),S_CUTR(c),S_CUTS(g),S_FLIGHT::R(H),XB(f)
      • Refutation
        • S(g);XR(I)
  • Actual
    • B(F);
    • Threat
      • QAB(C)
    • Vars
      • K(e);CHECK,N_GUARD,P_SPINB(f),P_SPINS(g),S_FLIGHT::QAR2(C)
      • R(c);XB(F)::QAB1(C)
      • R(c);::QAR2(C)
      • B(f);OGATE::R1(H)
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