MESON Chess Problem Database

Problem Display
PID: 53168 (7K/Q1R5/1p2b3/4kppP/2Rq4/4p2P/8/B6B w - - 0 1)

Rayner, James

British Chess Magazine, 1881

7K/Q1R5/1p2b3/4kppP/2Rq4/4p2P/8/B6B

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Bxd4#
    • 1...b5
      • 2.Qxd4#
  • Tries
    • 1.Bxd4+?
      • 1...Kd6
        • 2.R4c6#
        • 2.R7c6#
        • 2.Qxb6#
        • 2.Qa3#
      • 1...Kf4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Rf7#
      • 1...Kf4+
        • 2.Rg7#
      • 1...Kd6+
        • 2.Rg7#
      • 1...Kf6
        • 2.Bxd4#
      • 1...Bxc4
        • 2.Rc6#
      • 1...Bd5
        • 2.R7c6#
      • 1...Bd7
        • 2.R7c6#
      • 1...Bf7
        • 2.R7c6#
      • 1...Bc8
        • 2.R7c6#
      • 1...Bg8
        • 2.R7c6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • K(c);S_FLIGHT::B(A),XQ(b)
    • P(f);OGATE::QAB1(F),XQ(b)
  • Tries
    • Try
      • B(A);CHECK,XQ(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(F);
    • Threat
      • QAB(F)+R(G)
    • Vars
      • K(c);CHECK,S_FLIGHT::QAB(F)+R(G)
      • K(c);CHECK,N_SPINQ(b),S_FLIGHT::QAB(F)+R(G)
      • K(c);S_FLIGHT::B(A),XQ(b)
      • B(g);XR(D)::QAB(F)+R(G)
      • B(g);::QAB(F)+R(G)
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