MESON Chess Problem Database

Problem Display
PID: 76427 (4R3/8/8/3rpkpK/2Q5/2N5/B7/1bb5 w - - 0 1)

Our Black Knight

The Tablet, 1929

(First published on Sat Nov 16 1929)

4R3/8/8/3rpkpK/2Q5/2N5/B7/1bb5

#2

5 + 6

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Rf8#
      • 2.Qf7#
    • 1...Rd2
      • 2.Rf8#
      • 2.Qf7#
    • 1...Rd3
      • 2.Rf8#
      • 2.Qf7#
    • 1...Rd4
      • 2.Rf8#
      • 2.Qf7#
    • 1...Ra5
      • 2.Rf8#
      • 2.Qf7#
    • 1...Rb5
      • 2.Rf8#
      • 2.Qf7#
    • 1...Rc5
      • 2.Rf8#
      • 2.Qf7#
    • 1...Rd8
      • 2.Qf7#
    • 1...Bb2
      • 2.Qf1#
    • 1...Ba3
      • 2.Qf1#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Qg4#
      • 1...Be4
        • 2.Qc8#
      • 1...e4
        • 2.Qc8#
      • 1...g4
        • 2.Qxg4#
      • 1...Bf4!
    • 1.Qxd5?
      • threat
        • 2.Rf8#
        • 2.Qf7#
        • 2.Qxe5#
      • 1...Kf6
        • 2.Qf7#
        • 2.Qxe5#
      • 1...Bxa2
        • 2.Rf8#
        • 2.Qxe5#
      • 1...Bf4
        • 2.Rf8#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Ba3
        • 2.Qf3#
        • 2.Qf7#
        • 2.Qxe5#
      • 1...Kf4!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Qf8#
      • 1...Kf4
        • 2.Qf2#
      • 1...Kf6
        • 2.Qf8#
      • 1...Rxc5
        • 2.Rf8#
      • 1...Rd6
        • 2.Qxe5#
      • 1...Rd7
        • 2.Qxe5#
      • 1...Ba3
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(c);OGATE::QAR2(C)
    • B(b);N_GUARD::QAR(C)
  • Tries
    • Try
      • S(B);XR(c)
      • Threat
        • QAB1(C)
      • Vars
        • B(a);SBLOCK::QAB(C)
        • P(d);::QAB(C)
        • P(f);::QAB1(C),XP(f)
      • Refutation
        • B(b);
    • Try
      • Q(C);P_PINP(d),XR(c)
      • Threat
        • DUALS(3)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • K(e);P-FLIGHT::QAR2(C)
      • R(c);XQ(C)::R(E)
      • R(c);OGATE,P_SPINP(d)::QAR1(C),XP(d)
      • B(b);N_GUARD::QAR(C)
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