MESON Chess Problem Database

Problem Display
PID: 15131 (1R6/3K4/8/2p1p3/3k4/8/2Q2P2/8 w - - 0 1)

Speckmann, Werner

Die Schwalbe, 1980

1R6/3K4/8/2p1p3/3k4/8/2Q2P2/8

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
5454 Near Snap 2008
145 StrateGems 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qd3#
  • Tries
    • 1.Rb4+?
      • 1...Kd5
        • 2.Qd1#
        • 2.Qd3#
        • 2.Qe4#
        • 2.Qd2#
        • 2.Qc4#
      • 1...c4
        • 2.Qxc4#
      • 1...cxb4!
    • 1.Rc8?
      • 1...Kd5
        • 2.Qd3#
      • 1...c4
        • 2.Qxc4#
      • 1...e4!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Kc6#
        • 2.Ke6#
        • 2.Kc7#
        • 2.Ke7#
        • 2.Kc8#
        • 2.Ke8#
      • 1...Kd5
        • 2.Qd3#
      • 1...c4
        • 2.Kc6#
      • 1...e4
        • 2.Ke6#

This anticipates 35829(1997)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(A)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • P(b);P_SPINP(b)::QAR1(A),XP(b)
      • Refutation
        • P(b);XR(D)
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • P(b);::QAR1(A),XP(b)
      • Refutation
        • P(c);
  • Actual
    • R(D);
    • Threat
      • DUALS(6)
    • Vars
      • K(a);P-FLIGHT::QAR2(A)
      • P(b);::R(D)+K(C)
      • P(c);::R(D)+K(C)
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