MESON Chess Problem Database

Problem Display
PID: 85783 (2K5/2R1p3/3k4/5Q2/8/1p6/4r3/8 w - - 0 1)

Speckmann, Werner

Suomen Shakki, 1990

2K5/2R1p3/3k4/5Q2/8/1p6/4r3/8

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Qd7#
    • 1...Re6
      • 2.Qc5#
    • 1...e5
      • 2.Qd7#
    • 1...e6
      • 2.Qc5#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Qd5#
      • 1...Re5
        • 2.Qxe5#
      • 1...e6
        • 2.Qf8#
      • 1...Rd2
        • 2.Qe5#
      • 1...e5!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Rc6#
        • 2.Rd7#
      • 1...Re5
        • 2.Qd7#
      • 1...e5
        • 2.Qd7#
      • 1...Rc2
        • 2.Rd7#
      • 1...Re6
        • 2.Qc5#
      • 1...e6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);SBLOCK::QAR1(A)
    • R(a);SBLOCK::QAB1(A)
    • P(d);SBLOCK::QAR1(A)
    • P(d);SBLOCK::QAB1(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR1(A)
      • Vars
        • R(a);N_GUARD::QAB1(A),XR(a)
        • P(d);OGATEB,SBLOCK::QAB(A)
        • R(a);N_GUARD::QAB1(A)
      • Refutation
        • P(d);
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • R(a);SBLOCK::QAR1(A)
      • P(d);SBLOCK::QAR1(A)
      • R(a);::R1(B)
      • R(a);SBLOCK::QAB1(A)
      • P(d);SBLOCK::QAB1(A)
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