MESON Chess Problem Database

Problem Display
PID: 15208 (3R4/n2p4/3k1K2/3P4/2Q5/8/8/8 w - - 0 1)

Speckmann, Werner

Deutsche Schachzeitung, 1981

3R4/n2p4/3k1K2/3P4/2Q5/8/8/8

#2

4 + 3

3295 Einfuhrung in die Welt des Schachproblem 1984
3713 Snap 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Qc6#
    • 1...Sc6
      • 2.Qxc6#
    • 1...Sc8
      • 2.Qc6#
  • Tries
    • 1.Qb5?
      • threat
        • 2.Rxd7#
      • 1...Kc7
        • 2.Qb8#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxb5!
    • 1.Qc1?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qc6#
      • 1...Sb5
        • 2.Qc6#
      • 1...Kxd5!
    • 1.Qc3?
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qc6#
      • 1...Sb5
        • 2.Qc6#
      • 1...Kxd5!
    • 1.Qb4+?
      • 1...Kc7
        • 2.Qb8#
      • 1...Kxd5!
  • Keys
    • 1.Qc2!
      • 1...Kxd5
        • 2.Rxd7#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc8
        • 2.Qc6#
      • 1...Sb5
        • 2.Qc6#

Anticipated by 6424(1929)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
  • Tries
    • Try
      • Q(A);
      • Threat
        • R1(D),XP(c)
      • Vars
        • K(a);N_SPINP(c),S_FLIGHT::QAB1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINP(c),S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XP(B)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT,XP(B)::R(D),XP(c)
      • S(b);N_GUARD::QAR1(A),XS(b)
      • S(b);N_GUARD::QAR1(A)
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