MESON Chess Problem Database

Problem Display
PID: 268522 (3NK3/1r2p3/2p1Rp2/2P2p2/b1Bk1q2/Qp1P4/5p1B/3N4 w - - 0 1)

Barclay, William A

The Problemist, 1956

3NK3/1r2p3/2p1Rp2/2P2p2/b1Bk1q2/Qp1P4/5p1B/3N4

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Sxc6#
  • Tries
    • 1.Re5?
      • threat
        • 2.Qb2#
      • 1...Kxe5
        • 2.Qb2#
      • 1...fxe5
        • 2.Se6#
      • 1...Qc1
        • 2.Se6#
      • 1...Qd2
        • 2.Se6#
      • 1...b2
        • 2.Qc3#
      • 1...Qxe5!
  • Keys
    • 1.Rxc6!
      • threat
        • 2.Qb2#
      • 1...Bxc6+
        • 2.Sxc6#
      • 1...Ke5
        • 2.Qb2#
      • 1...Qc1
        • 2.Se6#
      • 1...Qd2
        • 2.Se6#
      • 1...b2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • R(i);S_CUTB(c)::S(H),XP(g)
  • Tries
    • Try
      • R(G);
      • Threat
        • QAB(C)
      • Vars
        • K(d);P_SPINQ(e),S_FLIGHT,XR(G)::QAB(C)
        • P(h);SBLOCK,XR(G)::S(H)
        • Q(e);::S(H)
        • P(b);OGATE::QAB1(C)
      • Refutation
        • Q(e);XR(G)
  • Actual
    • R(G);P_SPINR(G),XP(g)
    • Threat
      • QAB(C)
    • Vars
      • B(c);CHECK,XR(G)::S(H),XB(c)
      • K(d);P_SPINQ(e),S_FLIGHT::QAB(C)
      • Q(e);::S(H)
      • P(b);OGATE::QAB1(C)
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