MESON Chess Problem Database

Problem Display
PID: 15472 (2N2Nb1/1p3q2/1Bk5/4Pp1p/P7/p3P1QK/r4RR1/7B w - - 0 1)

Sydenham, Colin Peter

4th Prize, Mat 10. TT, 1984

2N2Nb1/1p3q2/1Bk5/4Pp1p/P7/p3P1QK/r4RR1/7B

#2

11 + 8

56 The Problemist 2006
15513 Selected Chess Problems of Colin Sydenham 2015

SOLUTION

  • SOUND
  • Tries
    • 1.Rb2?
      • threat
        • 2.Rgc2#
      • 1...Kd5
        • 2.Rgc2#
      • 1...Qc4
        • 2.Se7#
      • 1...Qxf8!
    • 1.Rc2+?
      • 1...Kd5
        • 2.Rg1#
        • 2.Rgd2#
        • 2.Rge2#
        • 2.Rgf2#
        • 2.Rh2#
      • 1...Rxc2
        • 2.Rxc2#
      • 1...Qc4!
    • 1.Qxg8?
      • threat
        • 2.Rg6#
      • 1...Qxf8
        • 2.Rg7#
      • 1...Qg6
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg5#
        • 2.Rxg6#
        • 2.Qc4#
      • 1...Kd5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rg6#
      • 1...Kd5
        • 2.Rg4#
      • 1...Qd5
        • 2.Qc7#
      • 1...Qg6
        • 2.Rxg6#
        • 2.Qd7#
      • 1...Qf6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Threat
        • B(A)+R(C),DCHECK
      • Vars
        • K(e);S_FLIGHT::B(A)+R(C)
        • Q(g);N_GUARD::S(J)
      • Refutation
        • Q(g);XS(K)
    • Try
      • R(B);CHECK
      • Vars
        • R(a);OGATE,XR(B)::B(A)+R(C),DCHECK,XR(a)
      • Refutation
        • Q(g);P_SPINQ(g)
    • Try
      • Q(E);XB(h)
      • Threat
        • B(A)+R(C),DCHECK
      • Vars
        • Q(g);N_GUARD,XS(K)::B(A)+R(C)
      • Refutation
        • K(e);P_SPINQ(g),S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • B(A)+R(C),DCHECK
    • Vars
      • K(e);S_FLIGHT::B(A)+R(C)
      • Q(g);OGATE,SBLOCK::QAR1(E)
      • Q(g);OGATE::QAB1(E)
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