MESON Chess Problem Database

Problem Display
PID: 85770 (2R5/3k1p1K/8/5N2/b1Q5/8/7b/8 w - - 0 1)

Speckmann, Werner

stern, 1965

(First published on Sun Sep 26 1965)

2R5/3k1p1K/8/5N2/b1Q5/8/7b/8

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Qc6#
    • 1...Bc2
      • 2.Qc6#
    • 1...Bb3
      • 2.Qc6#
    • 1...Bc6
      • 2.Qxc6#
  • Tries
    • 1.Rf8?
      • threat
        • 2.Qc8#
      • 1...Bc6
        • 2.Qxf7#
      • 1...Bc7!
    • 1.Rg8?
      • threat
        • 2.Qc8#
      • 1...Bc6
        • 2.Qxf7#
      • 1...Bc7!
    • 1.Rh8?
      • threat
        • 2.Qc8#
      • 1...Bc6
        • 2.Qxf7#
      • 1...Bc7!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qc8#
      • 1...Kxe8
        • 2.Qc8#
      • 1...Bc6
        • 2.Qxf7#
      • 1...Bc7
        • 2.Qxa4#

There are these versions: 234561

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • B(b);N_GUARD::QAB1(A)
    • B(b);N_GUARD,P_PINS(B)::QAB1(A)
    • B(b);N_GUARD::QAB1(A),XB(b)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);SBLOCK::QAR2(A),XP(d)
      • Refutation
        • B(a);
    • Try
      • R(D);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);SBLOCK::QAR2(A),XP(d)
      • Refutation
        • B(a);
    • Try
      • R(D);
      • Threat
        • QAB1(A)
      • Vars
        • B(b);SBLOCK::QAR2(A),XP(d)
      • Refutation
        • B(a);
  • Actual
    • R(D);
    • Threat
      • QAB1(A)
    • Vars
      • K(c);S_FLIGHT,XR(D)::QAR2(A)
      • B(b);SBLOCK::QAR2(A),XP(d)
      • B(a);SBLOCK::QAB(A),XB(b)
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