MESON Chess Problem Database

Problem Display
PID: 160053 (3qr3/4B2b/6Rr/3p3B/1p1R4/8/Q3P1p1/2k3K1 w - - 0 1)

Sydenham, Colin Peter

The Problemist, 1984

3qr3/4B2b/6Rr/3p3B/1p1R4/8/Q3P1p1/2k3K1

#2

7 + 8

15513 Selected Chess Problems of Colin Sydenham 2015
56 The Problemist 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Bg5+?
      • 1...Re3
        • 2.Bxe3#
      • 1...Qxg5!
    • 1.Rd2?
      • threat
        • 2.Qb2#
        • 2.Qc2#
      • 1...Bxg6
        • 2.Qb2#
      • 1...Qc7
        • 2.Qb2#
      • 1...Qc8
        • 2.Qb2#
      • 1...b3
        • 2.Qb2#
      • 1...Qb6+!
    • 1.Rc6+?
      • 1...Bc2
        • 2.Rxc2#
        • 2.Qa1#
        • 2.Qxc2#
      • 1...Rxc6!
  • Keys
    • 1.e4!
      • threat
        • 2.Rd1#
      • 1...Rxh5
        • 2.Rc6#
      • 1...dxe4
        • 2.Rc4#
      • 1...Qb6
        • 2.Bg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • R(h);N_GUARD,P_SPINR(h)::B(G),XR(h)
      • Refutation
        • Q(g);XB(G)
    • Try
      • R(D);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XR(F)::QAB1(B)
        • Q(g);::QAB1(B)
        • P(c);::QAB1(B)
      • Refutation
        • Q(g);CHECK
    • Try
      • R(F);CHECK
      • Refutation
        • R(e);XR(F)
  • Actual
    • P(C);
    • Threat
      • R1(D)
    • Vars
      • R(e);N_GUARD,XB(E)::R(F)
      • P(d);N_GUARD,XP(C)::R(D)
      • Q(g);N_GUARD,P_PINR(D)::B(G)
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