MESON Chess Problem Database

Problem Display
PID: 133899 (2B1K3/p3Np2/Nppk1P2/p5p1/r7/4p3/1QR4b/7b w - - 0 1)

Derbyshire, AE

The Field, 1962

(First published on Thu Jul 26 1962)

2B1K3/p3Np2/Nppk1P2/p5p1/r7/4p3/1QR4b/7b

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rxc6#
    • 1...Bd5
      • 2.Sf5#
  • Tries
    • 1.Qd4+?
      • 1...Bd5
        • 2.Sf5#
        • 2.Rxc6#
      • 1...Rxd4!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Sf5#
      • 1...bxc5
        • 2.Qb8#
      • 1...Re4
        • 2.Rxc6#
      • 1...Rf4
        • 2.Qe5#
      • 1...Be4
        • 2.Qxh2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(d);P_PINS(E),S_CUTB(a)::R1(B),XP(h)
    • B(a);SBLOCK::S(E)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • R(d);XQ(A)
  • Actual
    • R(B);
    • Threat
      • S(E)
    • Vars
      • P(g);OGATE,XR(B)::QAB(A)
      • R(d);P_PINS(E),S_CUTB(a)::R1(B),XP(h)
      • R(d);S_CUTB(b)::QAB1(A)
      • B(a);S_CUTR(d)::QAB(A),XB(b)
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